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</pre><pre class='rust '>
<span class='doccomment'>//! This module supports deserializing from primitives with the `ValueDeserializer` trait.</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::{<span class='ident'>BTreeMap</span>, <span class='ident'>BTreeSet</span>, <span class='ident'>HashMap</span>, <span class='ident'>HashSet</span>, <span class='ident'>btree_map</span>, <span class='ident'>btree_set</span>, <span class='ident'>hash_map</span>,
<span class='ident'>hash_set</span>};
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>borrow</span>::<span class='ident'>Cow</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>vec</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>, <span class='ident'>not</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)))]</span>
<span class='kw'>use</span> <span class='ident'>collections</span>::{<span class='ident'>BTreeMap</span>, <span class='ident'>BTreeSet</span>, <span class='ident'>Vec</span>, <span class='ident'>String</span>, <span class='ident'>btree_map</span>, <span class='ident'>btree_set</span>, <span class='ident'>vec</span>};
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>, <span class='ident'>not</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)))]</span>
<span class='kw'>use</span> <span class='ident'>collections</span>::<span class='ident'>borrow</span>::<span class='ident'>Cow</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>, <span class='ident'>not</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)))]</span>
<span class='kw'>use</span> <span class='ident'>collections</span>::<span class='ident'>boxed</span>::<span class='ident'>Box</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>all</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>, <span class='ident'>not</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)))]</span>
<span class='kw'>use</span> <span class='ident'>collections</span>::<span class='ident'>string</span>::<span class='ident'>ToString</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>hash</span>::<span class='ident'>Hash</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>error</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>not</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>))]</span>
<span class='kw'>use</span> <span class='ident'>error</span>;
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>fmt</span>::{<span class='self'>self</span>, <span class='ident'>Display</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>iter</span>::{<span class='self'>self</span>, <span class='ident'>Iterator</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>marker</span>::<span class='ident'>PhantomData</span>;
<span class='kw'>use</span> <span class='ident'>de</span>::{<span class='self'>self</span>, <span class='ident'>Expected</span>, <span class='ident'>SeqVisitor</span>};
<span class='kw'>use</span> <span class='ident'>bytes</span>;
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// This represents all the possible errors that can occur using the `ValueDeserializer`.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Debug</span>, <span class='ident'>PartialEq</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Error</span> {
<span class='ident'>err</span>: <span class='ident'>ErrorImpl</span>,
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>type</span> <span class='ident'>ErrorImpl</span> <span class='op'>=</span> <span class='ident'>Box</span><span class='op'><</span><span class='ident'>str</span><span class='op'>></span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>not</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>)))]</span>
<span class='kw'>type</span> <span class='ident'>ErrorImpl</span> <span class='op'>=</span> ();
<span class='kw'>impl</span> <span class='ident'>de</span>::<span class='ident'>Error</span> <span class='kw'>for</span> <span class='ident'>Error</span> {
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>fn</span> <span class='ident'>custom</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Display</span><span class='op'>></span>(<span class='ident'>msg</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>Error</span> { <span class='ident'>err</span>: <span class='ident'>msg</span>.<span class='ident'>to_string</span>().<span class='ident'>into_boxed_str</span>() }
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>not</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>)))]</span>
<span class='kw'>fn</span> <span class='ident'>custom</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Display</span><span class='op'>></span>(<span class='ident'>_msg</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>Error</span> { <span class='ident'>err</span>: () }
}
}
<span class='kw'>impl</span> <span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>Error</span> {
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>formatter</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='ident'>fmt</span>::<span class='ident'>Error</span><span class='op'>></span> {
<span class='ident'>formatter</span>.<span class='ident'>write_str</span>(<span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>err</span>)
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>not</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>)))]</span>
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>formatter</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='ident'>fmt</span>::<span class='ident'>Error</span><span class='op'>></span> {
<span class='ident'>formatter</span>.<span class='ident'>write_str</span>(<span class='string'>"Serde deserialization error"</span>)
}
}
<span class='kw'>impl</span> <span class='ident'>error</span>::<span class='ident'>Error</span> <span class='kw'>for</span> <span class='ident'>Error</span> {
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>fn</span> <span class='ident'>description</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='ident'>str</span> {
<span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>err</span>
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>not</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>)))]</span>
<span class='kw'>fn</span> <span class='ident'>description</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='ident'>str</span> {
<span class='string'>"Serde deserialization error"</span>
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// This trait converts primitive types into a deserializer.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>Error</span><span class='op'>></span> {
<span class='doccomment'>/// The actual deserializer type.</span>
<span class='kw'>type</span> <span class='ident'>Deserializer</span>: <span class='ident'>de</span>::<span class='ident'>Deserializer</span><span class='op'><</span><span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span><span class='op'>></span>;
<span class='doccomment'>/// Convert this value into a deserializer.</span>
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span>;
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> ()
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>UnitDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>UnitDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>UnitDeserializer</span> { <span class='ident'>marker</span>: <span class='ident'>PhantomData</span> }
}
}
<span class='doccomment'>/// A helper deserializer that deserializes a `()`.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>UnitDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>UnitDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>seq</span>
<span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span> <span class='kw'>struct</span>
<span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_unit</span>()
}
<span class='kw'>fn</span> <span class='ident'>deserialize_option</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_none</span>()
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>primitive_deserializer</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>ty</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>method</span>:<span class='ident'>ident</span> $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>cast</span>:<span class='ident'>tt</span>)<span class='kw-2'>*</span>) <span class='op'>=></span> {
<span class='doccomment'>/// A helper deserializer that deserializes a number.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>ty</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>ty</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>,
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span> {
<span class='ident'>value</span>: <span class='self'>self</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>,
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span>
<span class='ident'>option</span> <span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span>
<span class='ident'>tuple_struct</span> <span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>,
{
<span class='ident'>visitor</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>method</span>(<span class='self'>self</span>.<span class='ident'>value</span> $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>cast</span>)<span class='kw-2'>*</span>)
}
}
}
}
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>bool</span>, <span class='ident'>BoolDeserializer</span>, <span class='ident'>visit_bool</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>i8</span>, <span class='ident'>I8Deserializer</span>, <span class='ident'>visit_i8</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>i16</span>, <span class='ident'>I16Deserializer</span>, <span class='ident'>visit_i16</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>i32</span>, <span class='ident'>I32Deserializer</span>, <span class='ident'>visit_i32</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>i64</span>, <span class='ident'>I64Deserializer</span>, <span class='ident'>visit_i64</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>isize</span>, <span class='ident'>IsizeDeserializer</span>, <span class='ident'>visit_i64</span> <span class='kw'>as</span> <span class='ident'>i64</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>u8</span>, <span class='ident'>U8Deserializer</span>, <span class='ident'>visit_u8</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>u16</span>, <span class='ident'>U16Deserializer</span>, <span class='ident'>visit_u16</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>u64</span>, <span class='ident'>U64Deserializer</span>, <span class='ident'>visit_u64</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>usize</span>, <span class='ident'>UsizeDeserializer</span>, <span class='ident'>visit_u64</span> <span class='kw'>as</span> <span class='ident'>u64</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>f32</span>, <span class='ident'>F32Deserializer</span>, <span class='ident'>visit_f32</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>f64</span>, <span class='ident'>F64Deserializer</span>, <span class='ident'>visit_f64</span>);
<span class='macro'>primitive_deserializer</span><span class='macro'>!</span>(<span class='ident'>char</span>, <span class='ident'>CharDeserializer</span>, <span class='ident'>visit_char</span>);
<span class='doccomment'>/// A helper deserializer that deserializes a number.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>U32Deserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='ident'>u32</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>u32</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>U32Deserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>U32Deserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>U32Deserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>U32Deserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_u32</span>(<span class='self'>self</span>.<span class='ident'>value</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_enum</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>,
<span class='ident'>_variants</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>],
<span class='ident'>visitor</span>: <span class='ident'>V</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_enum</span>(<span class='self'>self</span>)
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>EnumVisitor</span> <span class='kw'>for</span> <span class='ident'>U32Deserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>type</span> <span class='ident'>Variant</span> <span class='op'>=</span> <span class='ident'>private</span>::<span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>visit_variant_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(<span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Variant</span>), <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='self'>self</span>).<span class='ident'>map</span>(<span class='ident'>private</span>::<span class='ident'>unit_only</span>)
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a `&str`.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>StrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>StrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>StrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>StrDeserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>StrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_str</span>(<span class='self'>self</span>.<span class='ident'>value</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_enum</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>,
<span class='ident'>_variants</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>],
<span class='ident'>visitor</span>: <span class='ident'>V</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_enum</span>(<span class='self'>self</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>EnumVisitor</span> <span class='kw'>for</span> <span class='ident'>StrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>type</span> <span class='ident'>Variant</span> <span class='op'>=</span> <span class='ident'>private</span>::<span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>visit_variant_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(<span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Variant</span>), <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='self'>self</span>).<span class='ident'>map</span>(<span class='ident'>private</span>::<span class='ident'>unit_only</span>)
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a `String`.</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>StringDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='ident'>String</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>String</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>StringDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>StringDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>StringDeserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>StringDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_string</span>(<span class='self'>self</span>.<span class='ident'>value</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_enum</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>,
<span class='ident'>_variants</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>],
<span class='ident'>visitor</span>: <span class='ident'>V</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_enum</span>(<span class='self'>self</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>EnumVisitor</span> <span class='kw'>for</span> <span class='ident'>StringDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>type</span> <span class='ident'>Variant</span> <span class='op'>=</span> <span class='ident'>private</span>::<span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>visit_variant_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(<span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Variant</span>), <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='self'>self</span>).<span class='ident'>map</span>(<span class='ident'>private</span>::<span class='ident'>unit_only</span>)
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a `String`.</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>CowStrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>CowStrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>CowStrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>CowStrDeserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>CowStrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>value</span> {
<span class='ident'>Cow</span>::<span class='ident'>Borrowed</span>(<span class='ident'>string</span>) <span class='op'>=></span> <span class='ident'>visitor</span>.<span class='ident'>visit_str</span>(<span class='ident'>string</span>),
<span class='ident'>Cow</span>::<span class='ident'>Owned</span>(<span class='ident'>string</span>) <span class='op'>=></span> <span class='ident'>visitor</span>.<span class='ident'>visit_string</span>(<span class='ident'>string</span>),
}
}
<span class='kw'>fn</span> <span class='ident'>deserialize_enum</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>,
<span class='ident'>_variants</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>],
<span class='ident'>visitor</span>: <span class='ident'>V</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_enum</span>(<span class='self'>self</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>EnumVisitor</span> <span class='kw'>for</span> <span class='ident'>CowStrDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>type</span> <span class='ident'>Variant</span> <span class='op'>=</span> <span class='ident'>private</span>::<span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>visit_variant_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(<span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Variant</span>), <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='self'>self</span>).<span class='ident'>map</span>(<span class='ident'>private</span>::<span class='ident'>unit_only</span>)
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a sequence.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>iter</span>: <span class='ident'>iter</span>::<span class='ident'>Fuse</span><span class='op'><</span><span class='ident'>I</span><span class='op'>></span>,
<span class='ident'>count</span>: <span class='ident'>usize</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='doccomment'>/// Construct a new `SeqDeserializer<I>`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>iter</span>: <span class='ident'>I</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>SeqDeserializer</span> {
<span class='ident'>iter</span>: <span class='ident'>iter</span>.<span class='ident'>fuse</span>(),
<span class='ident'>count</span>: <span class='number'>0</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
<span class='doccomment'>/// Check for remaining elements after passing a `SeqDeserializer` to</span>
<span class='doccomment'>/// `Visitor::visit_seq`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>end</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='ident'>E</span><span class='op'>></span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>remaining</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>next</span>().<span class='ident'>is_some</span>() {
<span class='ident'>remaining</span> <span class='op'>+=</span> <span class='number'>1</span>;
}
<span class='kw'>if</span> <span class='ident'>remaining</span> <span class='op'>==</span> <span class='number'>0</span> {
<span class='prelude-val'>Ok</span>(())
} <span class='kw'>else</span> {
<span class='comment'>// First argument is the number of elements in the data, second</span>
<span class='comment'>// argument is the number of elements expected by the Deserialize.</span>
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_length</span>(<span class='self'>self</span>.<span class='ident'>count</span> <span class='op'>+</span> <span class='ident'>remaining</span>, <span class='kw-2'>&</span><span class='ident'>ExpectedInSeq</span>(<span class='self'>self</span>.<span class='ident'>count</span>)))
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span><span class='op'><</span><span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>T</span><span class='op'>></span>,
<span class='ident'>T</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>let</span> <span class='ident'>v</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>visitor</span>.<span class='ident'>visit_seq</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>));
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>end</span>());
<span class='prelude-val'>Ok</span>(<span class='ident'>v</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>SeqVisitor</span> <span class='kw'>for</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span><span class='op'><</span><span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>T</span><span class='op'>></span>,
<span class='ident'>T</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>visit_seed</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span><span class='op'>></span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>next</span>() {
<span class='prelude-val'>Some</span>(<span class='ident'>value</span>) <span class='op'>=></span> {
<span class='self'>self</span>.<span class='ident'>count</span> <span class='op'>+=</span> <span class='number'>1</span>;
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>value</span>.<span class='ident'>into_deserializer</span>()).<span class='ident'>map</span>(<span class='prelude-val'>Some</span>)
}
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='prelude-val'>None</span>),
}
}
<span class='kw'>fn</span> <span class='ident'>size_hint</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> (<span class='ident'>usize</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>) {
<span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>size_hint</span>()
}
}
<span class='kw'>struct</span> <span class='ident'>ExpectedInSeq</span>(<span class='ident'>usize</span>);
<span class='kw'>impl</span> <span class='ident'>Expected</span> <span class='kw'>for</span> <span class='ident'>ExpectedInSeq</span> {
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>formatter</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> {
<span class='kw'>if</span> <span class='self'>self</span>.<span class='number'>0</span> <span class='op'>==</span> <span class='number'>1</span> {
<span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>formatter</span>, <span class='string'>"1 element in sequence"</span>)
} <span class='kw'>else</span> {
<span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>formatter</span>, <span class='string'>"{} elements in sequence"</span>, <span class='self'>self</span>.<span class='number'>0</span>)
}
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>vec</span>::<span class='ident'>IntoIter</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>SeqDeserializer</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>into_iter</span>())
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>BTreeSet</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Eq</span> <span class='op'>+</span> <span class='ident'>Ord</span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>btree_set</span>::<span class='ident'>IntoIter</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>SeqDeserializer</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>into_iter</span>())
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>HashSet</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Eq</span> <span class='op'>+</span> <span class='ident'>Hash</span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>SeqDeserializer</span><span class='op'><</span><span class='ident'>hash_set</span>::<span class='ident'>IntoIter</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>SeqDeserializer</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>into_iter</span>())
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a sequence using a `SeqVisitor`.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>SeqVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>visitor</span>: <span class='ident'>V_</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>SeqVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>SeqVisitor</span><span class='op'><</span><span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='doccomment'>/// Construct a new `SeqVisitorDeserializer<V_, E>`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>visitor</span>: <span class='ident'>V_</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>SeqVisitorDeserializer</span> {
<span class='ident'>visitor</span>: <span class='ident'>visitor</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>SeqVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>SeqVisitor</span><span class='op'><</span><span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span> {
<span class='ident'>visitor</span>.<span class='ident'>visit_seq</span>(<span class='self'>self</span>.<span class='ident'>visitor</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a map.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>I</span>::<span class='ident'>Item</span>: <span class='ident'>private</span>::<span class='ident'>Pair</span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='ident'>iter</span>: <span class='ident'>iter</span>::<span class='ident'>Fuse</span><span class='op'><</span><span class='ident'>I</span><span class='op'>></span>,
<span class='ident'>value</span>: <span class='prelude-ty'>Option</span><span class='op'><<</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span><span class='op'>></span>,
<span class='ident'>count</span>: <span class='ident'>usize</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>I</span>::<span class='ident'>Item</span>: <span class='ident'>private</span>::<span class='ident'>Pair</span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='doccomment'>/// Construct a new `MapDeserializer<I, K, V, E>`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>iter</span>: <span class='ident'>I</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>MapDeserializer</span> {
<span class='ident'>iter</span>: <span class='ident'>iter</span>.<span class='ident'>fuse</span>(),
<span class='ident'>value</span>: <span class='prelude-val'>None</span>,
<span class='ident'>count</span>: <span class='number'>0</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
<span class='doccomment'>/// Check for remaining elements after passing a `MapDeserializer` to</span>
<span class='doccomment'>/// `Visitor::visit_map`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>end</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='ident'>E</span><span class='op'>></span> {
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>remaining</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>next</span>().<span class='ident'>is_some</span>() {
<span class='ident'>remaining</span> <span class='op'>+=</span> <span class='number'>1</span>;
}
<span class='kw'>if</span> <span class='ident'>remaining</span> <span class='op'>==</span> <span class='number'>0</span> {
<span class='prelude-val'>Ok</span>(())
} <span class='kw'>else</span> {
<span class='comment'>// First argument is the number of elements in the data, second</span>
<span class='comment'>// argument is the number of elements expected by the Deserialize.</span>
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_length</span>(<span class='self'>self</span>.<span class='ident'>count</span> <span class='op'>+</span> <span class='ident'>remaining</span>, <span class='kw-2'>&</span><span class='ident'>ExpectedInMap</span>(<span class='self'>self</span>.<span class='ident'>count</span>)))
}
}
<span class='kw'>fn</span> <span class='ident'>next_pair</span>
(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>)
<span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>, <span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>)<span class='op'>></span> {
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>next</span>() {
<span class='prelude-val'>Some</span>(<span class='ident'>kv</span>) <span class='op'>=></span> {
<span class='self'>self</span>.<span class='ident'>count</span> <span class='op'>+=</span> <span class='number'>1</span>;
<span class='prelude-val'>Some</span>(<span class='ident'>private</span>::<span class='ident'>Pair</span>::<span class='ident'>split</span>(<span class='ident'>kv</span>))
}
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>None</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>I</span>::<span class='ident'>Item</span>: <span class='ident'>private</span>::<span class='ident'>Pair</span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V_</span><span class='op'>></span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V_</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V_</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>let</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>visitor</span>.<span class='ident'>visit_map</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>));
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>end</span>());
<span class='prelude-val'>Ok</span>(<span class='ident'>value</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_seq</span><span class='op'><</span><span class='ident'>V_</span><span class='op'>></span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V_</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V_</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>let</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>visitor</span>.<span class='ident'>visit_seq</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>));
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>end</span>());
<span class='prelude-val'>Ok</span>(<span class='ident'>value</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_seq_fixed_size</span><span class='op'><</span><span class='ident'>V_</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_len</span>: <span class='ident'>usize</span>,
<span class='ident'>visitor</span>: <span class='ident'>V_</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V_</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='self'>self</span>.<span class='ident'>deserialize_seq</span>(<span class='ident'>visitor</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span> <span class='kw'>struct</span> <span class='ident'>struct_field</span>
<span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>MapVisitor</span> <span class='kw'>for</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>I</span>::<span class='ident'>Item</span>: <span class='ident'>private</span>::<span class='ident'>Pair</span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>visit_key_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>T</span>::<span class='ident'>Value</span><span class='op'>></span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>next_pair</span>() {
<span class='prelude-val'>Some</span>((<span class='ident'>key</span>, <span class='ident'>value</span>)) <span class='op'>=></span> {
<span class='self'>self</span>.<span class='ident'>value</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>value</span>);
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>key</span>.<span class='ident'>into_deserializer</span>()).<span class='ident'>map</span>(<span class='prelude-val'>Some</span>)
}
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='prelude-val'>None</span>),
}
}
<span class='kw'>fn</span> <span class='ident'>visit_value_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>let</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>value</span>.<span class='ident'>take</span>();
<span class='comment'>// Panic because this indicates a bug in the program rather than an</span>
<span class='comment'>// expected failure.</span>
<span class='kw'>let</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='ident'>value</span>.<span class='ident'>expect</span>(<span class='string'>"MapVisitor::visit_value called before visit_key"</span>);
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>value</span>.<span class='ident'>into_deserializer</span>())
}
<span class='kw'>fn</span> <span class='ident'>visit_seed</span><span class='op'><</span><span class='ident'>TK</span>, <span class='ident'>TV</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
<span class='ident'>kseed</span>: <span class='ident'>TK</span>,
<span class='ident'>vseed</span>: <span class='ident'>TV</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>TK</span>::<span class='ident'>Value</span>, <span class='ident'>TV</span>::<span class='ident'>Value</span>)<span class='op'>></span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>TK</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>,
<span class='ident'>TV</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>next_pair</span>() {
<span class='prelude-val'>Some</span>((<span class='ident'>key</span>, <span class='ident'>value</span>)) <span class='op'>=></span> {
<span class='kw'>let</span> <span class='ident'>key</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>kseed</span>.<span class='ident'>deserialize</span>(<span class='ident'>key</span>.<span class='ident'>into_deserializer</span>()));
<span class='kw'>let</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>vseed</span>.<span class='ident'>deserialize</span>(<span class='ident'>value</span>.<span class='ident'>into_deserializer</span>()));
<span class='prelude-val'>Ok</span>(<span class='prelude-val'>Some</span>((<span class='ident'>key</span>, <span class='ident'>value</span>)))
}
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='prelude-val'>None</span>),
}
}
<span class='kw'>fn</span> <span class='ident'>size_hint</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> (<span class='ident'>usize</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>) {
<span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>size_hint</span>()
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>SeqVisitor</span> <span class='kw'>for</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>I</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>Iterator</span>,
<span class='ident'>I</span>::<span class='ident'>Item</span>: <span class='ident'>private</span>::<span class='ident'>Pair</span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>First</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='op'><</span><span class='ident'>I</span>::<span class='ident'>Item</span> <span class='kw'>as</span> <span class='ident'>private</span>::<span class='ident'>Pair</span><span class='op'>></span>::<span class='ident'>Second</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>visit_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>T</span>::<span class='ident'>Value</span><span class='op'>></span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>next_pair</span>() {
<span class='prelude-val'>Some</span>((<span class='ident'>k</span>, <span class='ident'>v</span>)) <span class='op'>=></span> {
<span class='kw'>let</span> <span class='ident'>de</span> <span class='op'>=</span> <span class='ident'>PairDeserializer</span>(<span class='ident'>k</span>, <span class='ident'>v</span>, <span class='ident'>PhantomData</span>);
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>de</span>).<span class='ident'>map</span>(<span class='prelude-val'>Some</span>)
}
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='prelude-val'>None</span>),
}
}
<span class='kw'>fn</span> <span class='ident'>size_hint</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> (<span class='ident'>usize</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>) {
<span class='self'>self</span>.<span class='ident'>iter</span>.<span class='ident'>size_hint</span>()
}
}
<span class='comment'>// Used in the `impl SeqVisitor for MapDeserializer` to visit the map as a</span>
<span class='comment'>// sequence of pairs.</span>
<span class='kw'>struct</span> <span class='ident'>PairDeserializer</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span>(<span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>);
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>PairDeserializer</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>B</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span> <span class='kw'>struct</span> <span class='ident'>struct_field</span>
<span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='self'>self</span>.<span class='ident'>deserialize_seq</span>(<span class='ident'>visitor</span>)
}
<span class='kw'>fn</span> <span class='ident'>deserialize_seq</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>pair_visitor</span> <span class='op'>=</span> <span class='ident'>PairVisitor</span>(<span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='number'>0</span>), <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='number'>1</span>), <span class='ident'>PhantomData</span>);
<span class='kw'>let</span> <span class='ident'>pair</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>visitor</span>.<span class='ident'>visit_seq</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>pair_visitor</span>));
<span class='kw'>if</span> <span class='ident'>pair_visitor</span>.<span class='number'>1</span>.<span class='ident'>is_none</span>() {
<span class='prelude-val'>Ok</span>(<span class='ident'>pair</span>)
} <span class='kw'>else</span> {
<span class='kw'>let</span> <span class='ident'>remaining</span> <span class='op'>=</span> <span class='ident'>pair_visitor</span>.<span class='ident'>size_hint</span>().<span class='number'>0</span>;
<span class='comment'>// First argument is the number of elements in the data, second</span>
<span class='comment'>// argument is the number of elements expected by the Deserialize.</span>
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_length</span>(<span class='number'>2</span>, <span class='kw-2'>&</span><span class='ident'>ExpectedInSeq</span>(<span class='number'>2</span> <span class='op'>-</span> <span class='ident'>remaining</span>)))
}
}
<span class='kw'>fn</span> <span class='ident'>deserialize_seq_fixed_size</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>len</span>: <span class='ident'>usize</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='kw'>if</span> <span class='ident'>len</span> <span class='op'>==</span> <span class='number'>2</span> {
<span class='self'>self</span>.<span class='ident'>deserialize_seq</span>(<span class='ident'>visitor</span>)
} <span class='kw'>else</span> {
<span class='comment'>// First argument is the number of elements in the data, second</span>
<span class='comment'>// argument is the number of elements expected by the Deserialize.</span>
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_length</span>(<span class='number'>2</span>, <span class='kw-2'>&</span><span class='ident'>ExpectedInSeq</span>(<span class='ident'>len</span>)))
}
}
}
<span class='kw'>struct</span> <span class='ident'>PairVisitor</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span>(<span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>A</span><span class='op'>></span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>B</span><span class='op'>></span>, <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>);
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>SeqVisitor</span> <span class='kw'>for</span> <span class='ident'>PairVisitor</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>A</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>B</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>visit_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>T</span>::<span class='ident'>Value</span><span class='op'>></span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>k</span>) <span class='op'>=</span> <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>take</span>() {
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>k</span>.<span class='ident'>into_deserializer</span>()).<span class='ident'>map</span>(<span class='prelude-val'>Some</span>)
} <span class='kw'>else</span> <span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=</span> <span class='self'>self</span>.<span class='number'>1</span>.<span class='ident'>take</span>() {
<span class='ident'>seed</span>.<span class='ident'>deserialize</span>(<span class='ident'>v</span>.<span class='ident'>into_deserializer</span>()).<span class='ident'>map</span>(<span class='prelude-val'>Some</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>Ok</span>(<span class='prelude-val'>None</span>)
}
}
<span class='kw'>fn</span> <span class='ident'>size_hint</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> (<span class='ident'>usize</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>) {
<span class='kw'>let</span> <span class='ident'>len</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>is_some</span>() {
<span class='number'>2</span>
} <span class='kw'>else</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='number'>1</span>.<span class='ident'>is_some</span>() {
<span class='number'>1</span>
} <span class='kw'>else</span> {
<span class='number'>0</span>
};
(<span class='ident'>len</span>, <span class='prelude-val'>Some</span>(<span class='ident'>len</span>))
}
}
<span class='kw'>struct</span> <span class='ident'>ExpectedInMap</span>(<span class='ident'>usize</span>);
<span class='kw'>impl</span> <span class='ident'>Expected</span> <span class='kw'>for</span> <span class='ident'>ExpectedInMap</span> {
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>formatter</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> {
<span class='kw'>if</span> <span class='self'>self</span>.<span class='number'>0</span> <span class='op'>==</span> <span class='number'>1</span> {
<span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>formatter</span>, <span class='string'>"1 element in map"</span>)
} <span class='kw'>else</span> {
<span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>formatter</span>, <span class='string'>"{} elements in map"</span>, <span class='self'>self</span>.<span class='number'>0</span>)
}
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>BTreeMap</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>K</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Eq</span> <span class='op'>+</span> <span class='ident'>Ord</span>,
<span class='ident'>V</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>btree_map</span>::<span class='ident'>IntoIter</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span><span class='op'>></span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>MapDeserializer</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>into_iter</span>())
}
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>)]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>HashMap</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>K</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Eq</span> <span class='op'>+</span> <span class='ident'>Hash</span>,
<span class='ident'>V</span>: <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>MapDeserializer</span><span class='op'><</span><span class='ident'>hash_map</span>::<span class='ident'>IntoIter</span><span class='op'><</span><span class='ident'>K</span>, <span class='ident'>V</span><span class='op'>></span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>MapDeserializer</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>into_iter</span>())
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='doccomment'>/// A helper deserializer that deserializes a map using a `MapVisitor`.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>MapVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>visitor</span>: <span class='ident'>V_</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>MapVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>MapVisitor</span><span class='op'><</span><span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='doccomment'>/// Construct a new `MapVisitorDeserializer<V_, E>`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>visitor</span>: <span class='ident'>V_</span>) <span class='op'>-></span> <span class='self'>Self</span> {
<span class='ident'>MapVisitorDeserializer</span> {
<span class='ident'>visitor</span>: <span class='ident'>visitor</span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>MapVisitorDeserializer</span><span class='op'><</span><span class='ident'>V_</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V_</span>: <span class='ident'>de</span>::<span class='ident'>MapVisitor</span><span class='op'><</span><span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span><span class='op'>></span>,
<span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span> {
<span class='ident'>visitor</span>.<span class='ident'>visit_map</span>(<span class='self'>self</span>.<span class='ident'>visitor</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>bytes</span>::<span class='ident'>Bytes</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>BytesDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>BytesDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>BytesDeserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>.<span class='ident'>into</span>(),
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='doccomment'>/// A helper deserializer that deserializes a `&[u8]`.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>BytesDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> [<span class='ident'>u8</span>],
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>BytesDeserializer</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_bytes</span>(<span class='self'>self</span>.<span class='ident'>value</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>ValueDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>bytes</span>::<span class='ident'>ByteBuf</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Deserializer</span> <span class='op'>=</span> <span class='ident'>ByteBufDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>;
<span class='kw'>fn</span> <span class='ident'>into_deserializer</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='self'>Self</span>::<span class='ident'>Deserializer</span> {
<span class='ident'>ByteBufDeserializer</span> {
<span class='ident'>value</span>: <span class='self'>self</span>.<span class='ident'>into</span>(),
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span>,
}
}
}
<span class='doccomment'>/// A helper deserializer that deserializes a `Vec<u8>`.</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>ByteBufDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>value</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span>,
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>any</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"std"</span>, <span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"collections"</span>))]</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>Deserializer</span> <span class='kw'>for</span> <span class='ident'>ByteBufDeserializer</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>deserialize</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='ident'>visitor</span>.<span class='ident'>visit_byte_buf</span>(<span class='self'>self</span>.<span class='ident'>value</span>)
}
<span class='macro'>forward_to_deserialize</span><span class='macro'>!</span> {
<span class='ident'>bool</span> <span class='ident'>u8</span> <span class='ident'>u16</span> <span class='ident'>u32</span> <span class='ident'>u64</span> <span class='ident'>i8</span> <span class='ident'>i16</span> <span class='ident'>i32</span> <span class='ident'>i64</span> <span class='ident'>f32</span> <span class='ident'>f64</span> <span class='ident'>char</span> <span class='ident'>str</span> <span class='ident'>string</span> <span class='ident'>unit</span> <span class='ident'>option</span>
<span class='ident'>seq</span> <span class='ident'>seq_fixed_size</span> <span class='ident'>bytes</span> <span class='ident'>map</span> <span class='ident'>unit_struct</span> <span class='ident'>newtype_struct</span> <span class='ident'>tuple_struct</span>
<span class='kw'>struct</span> <span class='ident'>struct_field</span> <span class='ident'>tuple</span> <span class='kw'>enum</span> <span class='ident'>ignored_any</span> <span class='ident'>byte_buf</span>
}
}
<span class='comment'>///////////////////////////////////////////////////////////////////////////////</span>
<span class='kw'>mod</span> <span class='ident'>private</span> {
<span class='kw'>use</span> <span class='ident'>de</span>::{<span class='self'>self</span>, <span class='ident'>Unexpected</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>marker</span>::<span class='ident'>PhantomData</span>;
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> {
<span class='ident'>marker</span>: <span class='ident'>PhantomData</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>,
}
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>unit_only</span><span class='op'><</span><span class='ident'>T</span>, <span class='ident'>E</span><span class='op'>></span>(<span class='ident'>t</span>: <span class='ident'>T</span>) <span class='op'>-></span> (<span class='ident'>T</span>, <span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>) {
(<span class='ident'>t</span>, <span class='ident'>UnitOnly</span> { <span class='ident'>marker</span>: <span class='ident'>PhantomData</span> })
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span> <span class='ident'>de</span>::<span class='ident'>VariantVisitor</span> <span class='kw'>for</span> <span class='ident'>UnitOnly</span><span class='op'><</span><span class='ident'>E</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>de</span>::<span class='ident'>Error</span>
{
<span class='kw'>type</span> <span class='ident'>Error</span> <span class='op'>=</span> <span class='ident'>E</span>;
<span class='kw'>fn</span> <span class='ident'>visit_unit</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span> {
<span class='prelude-val'>Ok</span>(())
}
<span class='kw'>fn</span> <span class='ident'>visit_newtype_seed</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>_seed</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>T</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>T</span>: <span class='ident'>de</span>::<span class='ident'>DeserializeSeed</span>
{
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_type</span>(<span class='ident'>Unexpected</span>::<span class='ident'>UnitVariant</span>, <span class='kw-2'>&</span><span class='string'>"newtype variant"</span>))
}
<span class='kw'>fn</span> <span class='ident'>visit_tuple</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>_len</span>: <span class='ident'>usize</span>, <span class='ident'>_visitor</span>: <span class='ident'>V</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_type</span>(<span class='ident'>Unexpected</span>::<span class='ident'>UnitVariant</span>, <span class='kw-2'>&</span><span class='string'>"tuple variant"</span>))
}
<span class='kw'>fn</span> <span class='ident'>visit_struct</span><span class='op'><</span><span class='ident'>V</span><span class='op'>></span>(<span class='self'>self</span>,
<span class='ident'>_fields</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>],
<span class='ident'>_visitor</span>: <span class='ident'>V</span>)
<span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>V</span>::<span class='ident'>Value</span>, <span class='self'>Self</span>::<span class='ident'>Error</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>V</span>: <span class='ident'>de</span>::<span class='ident'>Visitor</span>
{
<span class='prelude-val'>Err</span>(<span class='ident'>de</span>::<span class='ident'>Error</span>::<span class='ident'>invalid_type</span>(<span class='ident'>Unexpected</span>::<span class='ident'>UnitVariant</span>, <span class='kw-2'>&</span><span class='string'>"struct variant"</span>))
}
}
<span class='doccomment'>/// Avoid having to restate the generic types on `MapDeserializer`. The</span>
<span class='doccomment'>/// `Iterator::Item` contains enough information to figure out K and V.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Pair</span> {
<span class='kw'>type</span> <span class='ident'>First</span>;
<span class='kw'>type</span> <span class='ident'>Second</span>;
<span class='kw'>fn</span> <span class='ident'>split</span>(<span class='self'>self</span>) <span class='op'>-></span> (<span class='self'>Self</span>::<span class='ident'>First</span>, <span class='self'>Self</span>::<span class='ident'>Second</span>);
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>A</span>, <span class='ident'>B</span><span class='op'>></span> <span class='ident'>Pair</span> <span class='kw'>for</span> (<span class='ident'>A</span>, <span class='ident'>B</span>) {
<span class='kw'>type</span> <span class='ident'>First</span> <span class='op'>=</span> <span class='ident'>A</span>;
<span class='kw'>type</span> <span class='ident'>Second</span> <span class='op'>=</span> <span class='ident'>B</span>;
<span class='kw'>fn</span> <span class='ident'>split</span>(<span class='self'>self</span>) <span class='op'>-></span> (<span class='ident'>A</span>, <span class='ident'>B</span>) {
<span class='self'>self</span>
}
}
}
</pre>
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