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</pre><pre class='rust '>
<span class='comment'>// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT</span>
<span class='comment'>// file at the top-level directory of this distribution and at</span>
<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span>
<span class='comment'>//</span>
<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class='comment'>// option. This file may not be copied, modified, or distributed</span>
<span class='comment'>// except according to those terms.</span>
<span class='comment'>// Extracted from https://github.com/rust-num/num.</span>
<span class='comment'>// Rust 1.5 is unhappy that this private module is undocumented.</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>allow</span>(<span class='ident'>missing_docs</span>)]</span>
<span class='kw'>use</span> <span class='ident'>core</span>::{<span class='ident'>usize</span>, <span class='ident'>u8</span>, <span class='ident'>u16</span>, <span class='ident'>u32</span>, <span class='ident'>u64</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::{<span class='ident'>isize</span>, <span class='ident'>i8</span>, <span class='ident'>i16</span>, <span class='ident'>i32</span>, <span class='ident'>i64</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::{<span class='ident'>f32</span>, <span class='ident'>f64</span>};
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>mem</span>::<span class='ident'>size_of</span>;
<span class='doccomment'>/// Numbers which have upper and lower bounds</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Bounded</span> {
<span class='comment'>// FIXME (#5527): These should be associated constants</span>
<span class='doccomment'>/// returns the smallest finite number this type can represent</span>
<span class='kw'>fn</span> <span class='ident'>min_value</span>() <span class='op'>-></span> <span class='self'>Self</span>;
<span class='doccomment'>/// returns the largest finite number this type can represent</span>
<span class='kw'>fn</span> <span class='ident'>max_value</span>() <span class='op'>-></span> <span class='self'>Self</span>;
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>bounded_impl</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>min</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>max</span>:<span class='ident'>expr</span>) <span class='op'>=></span> {
<span class='kw'>impl</span> <span class='ident'>Bounded</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>min_value</span>() <span class='op'>-></span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span> { <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>min</span> }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>max_value</span>() <span class='op'>-></span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span> { <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>max</span> }
}
}
}
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>::<span class='ident'>MIN</span>, <span class='ident'>usize</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>u8</span>, <span class='ident'>u8</span>::<span class='ident'>MIN</span>, <span class='ident'>u8</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>u16</span>, <span class='ident'>u16</span>::<span class='ident'>MIN</span>, <span class='ident'>u16</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>u32</span>, <span class='ident'>u32</span>::<span class='ident'>MIN</span>, <span class='ident'>u32</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>u64</span>, <span class='ident'>u64</span>::<span class='ident'>MIN</span>, <span class='ident'>u64</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>isize</span>, <span class='ident'>isize</span>::<span class='ident'>MIN</span>, <span class='ident'>isize</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>i8</span>, <span class='ident'>i8</span>::<span class='ident'>MIN</span>, <span class='ident'>i8</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>i16</span>, <span class='ident'>i16</span>::<span class='ident'>MIN</span>, <span class='ident'>i16</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>i32</span>, <span class='ident'>i32</span>::<span class='ident'>MIN</span>, <span class='ident'>i32</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>i64</span>, <span class='ident'>i64</span>::<span class='ident'>MIN</span>, <span class='ident'>i64</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>f32</span>, <span class='ident'>f32</span>::<span class='ident'>MIN</span>, <span class='ident'>f32</span>::<span class='ident'>MAX</span>);
<span class='macro'>bounded_impl</span><span class='macro'>!</span>(<span class='ident'>f64</span>, <span class='ident'>f64</span>::<span class='ident'>MIN</span>, <span class='ident'>f64</span>::<span class='ident'>MAX</span>);
<span class='doccomment'>/// A generic trait for converting a value to a number.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>ToPrimitive</span> {
<span class='doccomment'>/// Converts the value of `self` to an `isize`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_isize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>isize</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_i64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_isize</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `i8`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i8</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_i64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_i8</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `i16`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i16</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_i64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_i16</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `i32`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i32</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_i64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_i32</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `i64`.</span>
<span class='kw'>fn</span> <span class='ident'>to_i64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i64</span><span class='op'>></span>;
<span class='doccomment'>/// Converts the value of `self` to a `usize`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_usize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></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'>to_u64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_usize</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `u8`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_u64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_u8</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `u16`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u16</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_u64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_u16</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `u32`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u32</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_u64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_u32</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `u64`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u64</span><span class='op'>></span>;
<span class='doccomment'>/// Converts the value of `self` to an `f32`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f32</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_f64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_f32</span>())
}
<span class='doccomment'>/// Converts the value of `self` to an `f64`.</span>
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f64</span><span class='op'>></span> {
<span class='self'>self</span>.<span class='ident'>to_i64</span>().<span class='ident'>and_then</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>to_f64</span>())
}
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_int_to_int</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
{
<span class='kw'>if</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span><span class='op'>></span>() <span class='op'><=</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span><span class='op'>></span>() {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='ident'>i64</span>;
<span class='kw'>let</span> <span class='ident'>min_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span> <span class='op'>=</span> <span class='ident'>Bounded</span>::<span class='ident'>min_value</span>();
<span class='kw'>let</span> <span class='ident'>max_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span> <span class='op'>=</span> <span class='ident'>Bounded</span>::<span class='ident'>max_value</span>();
<span class='kw'>if</span> <span class='ident'>min_value</span> <span class='kw'>as</span> <span class='ident'>i64</span> <span class='op'><=</span> <span class='ident'>n</span> <span class='op'>&&</span> <span class='ident'>n</span> <span class='op'><=</span> <span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>i64</span> {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>None</span>
}
}
}
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_int_to_uint</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
{
<span class='kw'>let</span> <span class='ident'>zero</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='kw'>let</span> <span class='ident'>max_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span> <span class='op'>=</span> <span class='ident'>Bounded</span>::<span class='ident'>max_value</span>();
<span class='kw'>if</span> <span class='ident'>zero</span> <span class='op'><=</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='op'>&&</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='ident'>u64</span> <span class='op'><=</span> <span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>u64</span> {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>None</span>
}
}
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_int</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>:<span class='ident'>ty</span>) <span class='op'>=></span> (
<span class='kw'>impl</span> <span class='ident'>ToPrimitive</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_isize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>isize</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_int</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>isize</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i8</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_int</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>i8</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i16</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_int</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>i16</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i32</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_int</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>i32</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i64</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_int</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>i64</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_usize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>usize</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u8</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u16</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u16</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u32</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u32</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u64</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_int_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u64</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f32</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>f32</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f64</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>f64</span>) }
}
)
}
<span class='macro'>impl_to_primitive_int</span><span class='macro'>!</span> { <span class='ident'>isize</span> }
<span class='macro'>impl_to_primitive_int</span><span class='macro'>!</span> { <span class='ident'>i8</span> }
<span class='macro'>impl_to_primitive_int</span><span class='macro'>!</span> { <span class='ident'>i16</span> }
<span class='macro'>impl_to_primitive_int</span><span class='macro'>!</span> { <span class='ident'>i32</span> }
<span class='macro'>impl_to_primitive_int</span><span class='macro'>!</span> { <span class='ident'>i64</span> }
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_uint_to_int</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
{
<span class='kw'>let</span> <span class='ident'>max_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span> <span class='op'>=</span> <span class='ident'>Bounded</span>::<span class='ident'>max_value</span>();
<span class='kw'>if</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='ident'>u64</span> <span class='op'><=</span> <span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>u64</span> {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>None</span>
}
}
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_uint_to_uint</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
{
<span class='kw'>if</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span><span class='op'>></span>() <span class='op'><=</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span><span class='op'>></span>() {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='kw'>let</span> <span class='ident'>zero</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span> <span class='op'>=</span> <span class='number'>0</span>;
<span class='kw'>let</span> <span class='ident'>max_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span> <span class='op'>=</span> <span class='ident'>Bounded</span>::<span class='ident'>max_value</span>();
<span class='kw'>if</span> <span class='ident'>zero</span> <span class='op'><=</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='op'>&&</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='ident'>u64</span> <span class='op'><=</span> <span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>u64</span> {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>None</span>
}
}
}
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_uint</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>:<span class='ident'>ty</span>) <span class='op'>=></span> (
<span class='kw'>impl</span> <span class='ident'>ToPrimitive</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_isize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>isize</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_int</span><span class='macro'>!</span>(<span class='ident'>isize</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i8</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_int</span><span class='macro'>!</span>(<span class='ident'>i8</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i16</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_int</span><span class='macro'>!</span>(<span class='ident'>i16</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i32</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_int</span><span class='macro'>!</span>(<span class='ident'>i32</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i64</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_int</span><span class='macro'>!</span>(<span class='ident'>i64</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_usize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span> {
<span class='macro'>impl_to_primitive_uint_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>usize</span>, <span class='kw-2'>*</span><span class='self'>self</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u8</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u16</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u16</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u32</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u32</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u64</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_uint_to_uint</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>u64</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f32</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>f32</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f64</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>f64</span>) }
}
)
}
<span class='macro'>impl_to_primitive_uint</span><span class='macro'>!</span> { <span class='ident'>usize</span> }
<span class='macro'>impl_to_primitive_uint</span><span class='macro'>!</span> { <span class='ident'>u8</span> }
<span class='macro'>impl_to_primitive_uint</span><span class='macro'>!</span> { <span class='ident'>u16</span> }
<span class='macro'>impl_to_primitive_uint</span><span class='macro'>!</span> { <span class='ident'>u32</span> }
<span class='macro'>impl_to_primitive_uint</span><span class='macro'>!</span> { <span class='ident'>u64</span> }
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_float_to_float</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span>:<span class='ident'>expr</span>) <span class='op'>=></span> (
<span class='kw'>if</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span><span class='op'>></span>() <span class='op'><=</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span><span class='op'>></span>() {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='kw'>let</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='ident'>f64</span>;
<span class='kw'>let</span> <span class='ident'>max_value</span>: <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span> <span class='op'>=</span> ::<span class='ident'>core</span>::<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>SrcT</span>::<span class='ident'>MAX</span>;
<span class='kw'>if</span> <span class='op'>-</span><span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>f64</span> <span class='op'><=</span> <span class='ident'>n</span> <span class='op'>&&</span> <span class='ident'>n</span> <span class='op'><=</span> <span class='ident'>max_value</span> <span class='kw'>as</span> <span class='ident'>f64</span> {
<span class='prelude-val'>Some</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>slf</span> <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>DstT</span>)
} <span class='kw'>else</span> {
<span class='prelude-val'>None</span>
}
}
)
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_to_primitive_float</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>:<span class='ident'>ident</span>) <span class='op'>=></span> (
<span class='kw'>impl</span> <span class='ident'>ToPrimitive</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_isize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>isize</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>isize</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i8</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>i8</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i16</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>i16</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i32</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>i32</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_i64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>i64</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>i64</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_usize</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>usize</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u8</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>u8</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u16</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u16</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>u16</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u32</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>u32</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_u64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>u64</span><span class='op'>></span> { <span class='prelude-val'>Some</span>(<span class='kw-2'>*</span><span class='self'>self</span> <span class='kw'>as</span> <span class='ident'>u64</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f32</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f32</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_float_to_float</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>f32</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>to_f64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>f64</span><span class='op'>></span> { <span class='macro'>impl_to_primitive_float_to_float</span><span class='macro'>!</span>(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>, <span class='ident'>f64</span>, <span class='kw-2'>*</span><span class='self'>self</span>) }
}
)
}
<span class='macro'>impl_to_primitive_float</span><span class='macro'>!</span> { <span class='ident'>f32</span> }
<span class='macro'>impl_to_primitive_float</span><span class='macro'>!</span> { <span class='ident'>f64</span> }
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>FromPrimitive</span>: <span class='ident'>Sized</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_isize</span>(<span class='ident'>n</span>: <span class='ident'>isize</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_i64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>i64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_i8</span>(<span class='ident'>n</span>: <span class='ident'>i8</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_i64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>i64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_i16</span>(<span class='ident'>n</span>: <span class='ident'>i16</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_i64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>i64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_i32</span>(<span class='ident'>n</span>: <span class='ident'>i32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_i64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>i64</span>)
}
<span class='kw'>fn</span> <span class='ident'>from_i64</span>(<span class='ident'>n</span>: <span class='ident'>i64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span>;
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_usize</span>(<span class='ident'>n</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_u64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>u64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_u8</span>(<span class='ident'>n</span>: <span class='ident'>u8</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_u64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>u64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_u16</span>(<span class='ident'>n</span>: <span class='ident'>u16</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_u64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>u64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_u32</span>(<span class='ident'>n</span>: <span class='ident'>u32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_u64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>u64</span>)
}
<span class='kw'>fn</span> <span class='ident'>from_u64</span>(<span class='ident'>n</span>: <span class='ident'>u64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span>;
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_f32</span>(<span class='ident'>n</span>: <span class='ident'>f32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_f64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>f64</span>)
}
<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>fn</span> <span class='ident'>from_f64</span>(<span class='ident'>n</span>: <span class='ident'>f64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='self'>Self</span><span class='op'>></span> {
<span class='ident'>FromPrimitive</span>::<span class='ident'>from_i64</span>(<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>i64</span>)
}
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>impl_from_primitive</span> {
(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span>:<span class='ident'>ty</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>:<span class='ident'>ident</span>) <span class='op'>=></span> (
<span class='kw'>impl</span> <span class='ident'>FromPrimitive</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span> {
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_i8</span>(<span class='ident'>n</span>: <span class='ident'>i8</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_i16</span>(<span class='ident'>n</span>: <span class='ident'>i16</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_i32</span>(<span class='ident'>n</span>: <span class='ident'>i32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_i64</span>(<span class='ident'>n</span>: <span class='ident'>i64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_u8</span>(<span class='ident'>n</span>: <span class='ident'>u8</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_u16</span>(<span class='ident'>n</span>: <span class='ident'>u16</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_u32</span>(<span class='ident'>n</span>: <span class='ident'>u32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_u64</span>(<span class='ident'>n</span>: <span class='ident'>u64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_f32</span>(<span class='ident'>n</span>: <span class='ident'>f32</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
<span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>from_f64</span>(<span class='ident'>n</span>: <span class='ident'>f64</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>T</span><span class='op'>></span> { <span class='ident'>n</span>.<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>to_ty</span>() }
}
)
}
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>isize</span>, <span class='ident'>to_isize</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>i8</span>, <span class='ident'>to_i8</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>i16</span>, <span class='ident'>to_i16</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>i32</span>, <span class='ident'>to_i32</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>i64</span>, <span class='ident'>to_i64</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>usize</span>, <span class='ident'>to_usize</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>u8</span>, <span class='ident'>to_u8</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>u16</span>, <span class='ident'>to_u16</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>u32</span>, <span class='ident'>to_u32</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>u64</span>, <span class='ident'>to_u64</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>f32</span>, <span class='ident'>to_f32</span> }
<span class='macro'>impl_from_primitive</span><span class='macro'>!</span> { <span class='ident'>f64</span>, <span class='ident'>to_f64</span> }
</pre>
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