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</pre><pre class="rust ">
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Tokens</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">borrow</span>::<span class="ident">Cow</span>;
<span class="doccomment">/// Types that can be interpolated inside a `quote!(...)` invocation.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">ToTokens</span> {
<span class="doccomment">/// Write `self` to the given `Tokens`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Example implementation for a struct representing Rust paths like</span>
<span class="doccomment">/// `std::cmp::PartialEq`:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```ignore</span>
<span class="doccomment">/// pub struct Path {</span>
<span class="doccomment">/// pub global: bool,</span>
<span class="doccomment">/// pub segments: Vec<PathSegment>,</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// impl ToTokens for Path {</span>
<span class="doccomment">/// fn to_tokens(&self, tokens: &mut Tokens) {</span>
<span class="doccomment">/// for (i, segment) in self.segments.iter().enumerate() {</span>
<span class="doccomment">/// if i > 0 || self.global {</span>
<span class="doccomment">/// tokens.append("::");</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// segment.to_tokens(tokens);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>);
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">ToOwned</span> <span class="op">+</span> <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Cow</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Box</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">t</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">t</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">str</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">escaped</span> <span class="op">=</span> <span class="string">"\""</span>.<span class="ident">to_string</span>();
<span class="kw">for</span> <span class="ident">ch</span> <span class="kw">in</span> <span class="self">self</span>.<span class="ident">chars</span>() {
<span class="kw">match</span> <span class="ident">ch</span> {
<span class="string">'\0'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">r"\0"</span>),
<span class="string">'\''</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">"'"</span>),
_ <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">extend</span>(<span class="ident">ch</span>.<span class="ident">escape_default</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">c</span><span class="op">|</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">char</span>)),
}
}
<span class="ident">escaped</span>.<span class="ident">push</span>(<span class="string">'"'</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="ident">escaped</span>);
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">String</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>.<span class="ident">as_str</span>().<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">char</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="string">'\0'</span> <span class="op">=></span> <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">r"'\0'"</span>),
<span class="string">'"'</span> <span class="op">=></span> <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"'\"'"</span>),
_ <span class="op">=></span> <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="self">self</span>)),
}
}
}
<span class="doccomment">/// Wrap a `&str` so it interpolates as a byte-string: `b"abc"`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ByteStr</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw">pub</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">ByteStr</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">escaped</span> <span class="op">=</span> <span class="string">"b\""</span>.<span class="ident">to_string</span>();
<span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">bytes</span>() {
<span class="kw">match</span> <span class="ident">b</span> {
<span class="string">b'\0'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">r"\0"</span>),
<span class="string">b'\t'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">r"\t"</span>),
<span class="string">b'\n'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">r"\n"</span>),
<span class="string">b'\r'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">r"\r"</span>),
<span class="string">b'"'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">"\\\""</span>),
<span class="string">b'\\'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="string">"\\\\"</span>),
<span class="string">b'\x20'</span> ... <span class="string">b'\x7E'</span> <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push</span>(<span class="ident">b</span> <span class="kw">as</span> <span class="ident">char</span>),
_ <span class="op">=></span> <span class="ident">escaped</span>.<span class="ident">push_str</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"\\x{:02X}"</span>, <span class="ident">b</span>)),
}
}
<span class="ident">escaped</span>.<span class="ident">push</span>(<span class="string">'"'</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="ident">escaped</span>);
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_to_tokens_display</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span>) <span class="op">=></span> {
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">to_string</span>());
}
}
};
}
<span class="macro">impl_to_tokens_display</span><span class="macro">!</span>(<span class="ident">Tokens</span>);
<span class="macro">impl_to_tokens_display</span><span class="macro">!</span>(<span class="ident">bool</span>);
<span class="doccomment">/// Wrap an integer so it interpolates as a hexadecimal.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Hex</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw">pub</span> <span class="ident">T</span>);
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_to_tokens_integer</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span>) <span class="op">=></span> {
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>)), <span class="self">self</span>));
}
}
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Hex</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"0x{:X}"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>)), <span class="self">self</span>.<span class="number">0</span>));
}
}
};
}
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">i8</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">i16</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">i32</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">i64</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">isize</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">u8</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">u16</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">u32</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">u64</span>);
<span class="macro">impl_to_tokens_integer</span><span class="macro">!</span>(<span class="ident">usize</span>);
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_to_tokens_floating</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ty</span>) <span class="op">=></span> {
<span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">num</span>::<span class="ident">FpCategory</span>::<span class="kw-2">*</span>;
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">classify</span>() {
<span class="ident">Zero</span> <span class="op">|</span> <span class="ident">Subnormal</span> <span class="op">|</span> <span class="ident">Normal</span> <span class="op">=></span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>)), <span class="self">self</span>));
}
<span class="ident">Nan</span> <span class="op">=></span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"std"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>));
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"NAN"</span>);
}
<span class="ident">Infinite</span> <span class="op">=></span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"std"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>));
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"::"</span>);
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_sign_positive</span>() {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"INFINITY"</span>);
} <span class="kw">else</span> {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"NEG_INFINITY"</span>);
}
}
}
}
}
};
}
<span class="macro">impl_to_tokens_floating</span><span class="macro">!</span>(<span class="ident">f32</span>);
<span class="macro">impl_to_tokens_floating</span><span class="macro">!</span>(<span class="ident">f64</span>);
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> [<span class="ident">T</span>] {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"["</span>);
<span class="kw">for</span> <span class="ident">item</span> <span class="kw">in</span> <span class="self">self</span> {
<span class="ident">item</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">","</span>);
}
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"]"</span>);
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</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">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>[..].<span class="ident">to_tokens</span>(<span class="ident">tokens</span>)
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">array_impls</span> {
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">N</span>:<span class="ident">expr</span>)<span class="op">+</span>) <span class="op">=></span> {
$(
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">ToTokens</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> [<span class="ident">T</span>; <span class="macro-nonterminal">$</span><span class="macro-nonterminal">N</span>] {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="self">self</span>[..].<span class="ident">to_tokens</span>(<span class="ident">tokens</span>)
}
}
)<span class="op">+</span>
}
}
<span class="macro">array_impls</span><span class="macro">!</span> {
<span class="number">0</span> <span class="number">1</span> <span class="number">2</span> <span class="number">3</span> <span class="number">4</span> <span class="number">5</span> <span class="number">6</span> <span class="number">7</span> <span class="number">8</span> <span class="number">9</span>
<span class="number">10</span> <span class="number">11</span> <span class="number">12</span> <span class="number">13</span> <span class="number">14</span> <span class="number">15</span> <span class="number">16</span> <span class="number">17</span> <span class="number">18</span> <span class="number">19</span>
<span class="number">20</span> <span class="number">21</span> <span class="number">22</span> <span class="number">23</span> <span class="number">24</span> <span class="number">25</span> <span class="number">26</span> <span class="number">27</span> <span class="number">28</span> <span class="number">29</span>
<span class="number">30</span> <span class="number">31</span> <span class="number">32</span>
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">tuple_impls</span> {
($(
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">Tuple</span>:<span class="ident">ident</span> {
$((<span class="macro-nonterminal">$</span><span class="macro-nonterminal">idx</span>:<span class="ident">tt</span>) <span class="op">-></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>:<span class="ident">ident</span>)<span class="op">*</span>
}
)<span class="op">+</span>) <span class="op">=></span> {
$(
<span class="kw">impl</span><span class="op"><</span>$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>: <span class="ident">ToTokens</span>),<span class="kw-2">*</span><span class="op">></span> <span class="ident">ToTokens</span> <span class="kw">for</span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">T</span>,)<span class="kw-2">*</span>) {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Tokens</span>) {
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">"("</span>);
$(
<span class="self">self</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">idx</span>.<span class="ident">to_tokens</span>(<span class="ident">tokens</span>);
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">","</span>);
)<span class="op">*</span>
<span class="ident">tokens</span>.<span class="ident">append</span>(<span class="string">")"</span>);
}
}
)<span class="op">+</span>
}
}
<span class="macro">tuple_impls</span><span class="macro">!</span> {
<span class="ident">Tuple0</span> {}
<span class="ident">Tuple1</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
}
<span class="ident">Tuple2</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
}
<span class="ident">Tuple3</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
}
<span class="ident">Tuple4</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
}
<span class="ident">Tuple5</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
}
<span class="ident">Tuple6</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
}
<span class="ident">Tuple7</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
}
<span class="ident">Tuple8</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
(<span class="number">7</span>) <span class="op">-></span> <span class="ident">H</span>
}
<span class="ident">Tuple9</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
(<span class="number">7</span>) <span class="op">-></span> <span class="ident">H</span>
(<span class="number">8</span>) <span class="op">-></span> <span class="ident">I</span>
}
<span class="ident">Tuple10</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
(<span class="number">7</span>) <span class="op">-></span> <span class="ident">H</span>
(<span class="number">8</span>) <span class="op">-></span> <span class="ident">I</span>
(<span class="number">9</span>) <span class="op">-></span> <span class="ident">J</span>
}
<span class="ident">Tuple11</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
(<span class="number">7</span>) <span class="op">-></span> <span class="ident">H</span>
(<span class="number">8</span>) <span class="op">-></span> <span class="ident">I</span>
(<span class="number">9</span>) <span class="op">-></span> <span class="ident">J</span>
(<span class="number">10</span>) <span class="op">-></span> <span class="ident">K</span>
}
<span class="ident">Tuple12</span> {
(<span class="number">0</span>) <span class="op">-></span> <span class="ident">A</span>
(<span class="number">1</span>) <span class="op">-></span> <span class="ident">B</span>
(<span class="number">2</span>) <span class="op">-></span> <span class="ident">C</span>
(<span class="number">3</span>) <span class="op">-></span> <span class="ident">D</span>
(<span class="number">4</span>) <span class="op">-></span> <span class="ident">E</span>
(<span class="number">5</span>) <span class="op">-></span> <span class="ident">F</span>
(<span class="number">6</span>) <span class="op">-></span> <span class="ident">G</span>
(<span class="number">7</span>) <span class="op">-></span> <span class="ident">H</span>
(<span class="number">8</span>) <span class="op">-></span> <span class="ident">I</span>
(<span class="number">9</span>) <span class="op">-></span> <span class="ident">J</span>
(<span class="number">10</span>) <span class="op">-></span> <span class="ident">K</span>
(<span class="number">11</span>) <span class="op">-></span> <span class="ident">L</span>
}
}
</pre>
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