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A crate for generating OpenSCAD models using rust
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    <section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class='rust '>
<span class='kw'>use</span> <span class='ident'>std</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'>std</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'>std</span>::{<span class='ident'>f32</span>, <span class='ident'>f64</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'>-&gt;</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'>-&gt;</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'>$</span><span class='macro-nonterminal'>max</span>:<span class='ident'>expr</span>) <span class='op'>=&gt;</span> {
        <span class='kw'>impl</span> <span class='ident'>Bounded</span> <span class='kw'>for</span> <span class='macro-nonterminal'>$</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'>-&gt;</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'>-&gt;</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'>macro_rules</span><span class='macro'>!</span> <span class='ident'>for_each_tuple_</span> {
    ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span>:<span class='ident'>ident</span> <span class='op'>!</span><span class='op'>!</span> ) <span class='op'>=&gt;</span> (
        <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span><span class='op'>!</span> { }
    );
    ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span>:<span class='ident'>ident</span> <span class='op'>!</span><span class='op'>!</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h</span>:<span class='ident'>ident</span>, $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span>:<span class='ident'>ident</span>,)<span class='op'>*</span> ) <span class='op'>=&gt;</span> (
        <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span><span class='op'>!</span> { <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>h</span> $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span>)<span class='op'>*</span> }
        <span class='macro'>for_each_tuple_</span><span class='macro'>!</span> { <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span> <span class='op'>!</span><span class='op'>!</span> $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>t</span>,)<span class='op'>*</span> }
    );
}
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>for_each_tuple</span> {
    ( <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span>:<span class='ident'>ident</span> ) <span class='op'>=&gt;</span> (
        <span class='macro'>for_each_tuple_</span><span class='macro'>!</span> { <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>m</span> <span class='op'>!</span><span class='op'>!</span> <span class='ident'>A</span>, <span class='ident'>B</span>, <span class='ident'>C</span>, <span class='ident'>D</span>, <span class='ident'>E</span>, <span class='ident'>F</span>, <span class='ident'>G</span>, <span class='ident'>H</span>, <span class='ident'>I</span>, <span class='ident'>J</span>, <span class='ident'>K</span>, <span class='ident'>L</span>, <span class='ident'>M</span>, <span class='ident'>N</span>, <span class='ident'>O</span>, <span class='ident'>P</span>, <span class='ident'>Q</span>, <span class='ident'>R</span>, <span class='ident'>S</span>, <span class='ident'>T</span>, }
    );
}

<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>bounded_tuple</span> {
    ( $(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>:<span class='ident'>ident</span>)<span class='op'>*</span> ) <span class='op'>=&gt;</span> (
        <span class='kw'>impl</span><span class='op'>&lt;</span>$(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>: <span class='ident'>Bounded</span>,)<span class='op'>*</span><span class='op'>&gt;</span> <span class='ident'>Bounded</span> <span class='kw'>for</span> ($(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>,)<span class='op'>*</span>) {
            <span class='kw'>fn</span> <span class='ident'>min_value</span>() <span class='op'>-&gt;</span> <span class='self'>Self</span> {
                ($(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>::<span class='ident'>min_value</span>(),)<span class='op'>*</span>)
            }
            <span class='kw'>fn</span> <span class='ident'>max_value</span>() <span class='op'>-&gt;</span> <span class='self'>Self</span> {
                ($(<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>name</span>::<span class='ident'>max_value</span>(),)<span class='op'>*</span>)
            }
        }
    );
}

<span class='macro'>for_each_tuple</span><span class='macro'>!</span>(<span class='ident'>bounded_tuple</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>);
</pre>
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