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177 lines
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<p class='location'><a href='index.html'>synom</a></p><script>window.sidebarCurrent = {name: 'terminated_list', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>synom</a>::<wbr><a class="macro" href=''>terminated_list</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/synom/helper.rs.html#439-496' title='goto source code'>[src]</a></span></h1>
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<pre class="rust macro">
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<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">terminated_list</span> {
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro">punct</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">sep</span>:<span class="ident">expr</span>), <span class="macro-nonterminal">$</span><span class="macro-nonterminal">f</span>:<span class="ident">ident</span>) <span class="op">=></span> { ... };
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">sepmac</span>:<span class="macro">ident</span><span class="macro">!</span>( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">separgs</span>:<span class="ident">tt</span>)<span class="op">*</span> ), <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmac</span>:<span class="macro">ident</span><span class="macro">!</span>( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fargs</span>:<span class="ident">tt</span>)<span class="op">*</span> )) <span class="op">=></span> { ... };
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">sepmac</span>:<span class="macro">ident</span><span class="macro">!</span>( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">separgs</span>:<span class="ident">tt</span>)<span class="op">*</span> ), <span class="macro-nonterminal">$</span><span class="macro-nonterminal">f</span>:<span class="ident">expr</span>) <span class="op">=></span> { ... };
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">sep</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmac</span>:<span class="macro">ident</span><span class="macro">!</span>( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fargs</span>:<span class="ident">tt</span>)<span class="op">*</span> )) <span class="op">=></span> { ... };
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">sep</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">f</span>:<span class="ident">expr</span>) <span class="op">=></span> { ... };
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}</pre>
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<div class='docblock'><p>Zero or more values separated by some separator. A trailing separator is
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allowed.</p>
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<ul>
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<li><strong>Syntax:</strong> <code>terminated_list!(punct!("..."), THING)</code></li>
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<li><strong>Output:</strong> <code>Vec<THING></code></li>
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</ul>
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<p>You may also be looking for:</p>
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<ul>
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<li><code>separated_list!</code> - zero or more, allows trailing separator</li>
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<li><code>separated_nonempty_list!</code> - one or more values</li>
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<li><code>many0!</code> - zero or more, no separator</li>
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</ul>
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<pre class="rust rust-example-rendered">
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">syn</span>;
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<span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">synom</span>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">Expr</span>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">parse</span>::<span class="ident">expr</span>;
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<span class="macro">named</span><span class="macro">!</span>(<span class="ident">expr_list</span> <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Expr</span><span class="op">></span>,
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<span class="macro">terminated_list</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">","</span>), <span class="ident">expr</span>)
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);
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="string">"1 + 1, things, Construct { this: thing },"</span>;
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<span class="kw">let</span> <span class="ident">parsed</span> <span class="op">=</span> <span class="ident">expr_list</span>(<span class="ident">input</span>).<span class="ident">expect</span>(<span class="string">"expr list"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">parsed</span>.<span class="ident">len</span>(), <span class="number">3</span>);
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}</pre>
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<pre class="rust rust-example-rendered">
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">syn</span>;
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<span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">synom</span>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">Ident</span>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">parse</span>::<span class="ident">ident</span>;
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<span class="macro">named</span><span class="macro">!</span>(<span class="ident">run_on</span> <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Ident</span><span class="op">></span>,
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<span class="macro">terminated</span><span class="macro">!</span>(
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<span class="macro">terminated_list</span><span class="macro">!</span>(<span class="macro">keyword</span><span class="macro">!</span>(<span class="string">"and"</span>), <span class="macro">preceded</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"$"</span>), <span class="ident">ident</span>)),
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<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"..."</span>)
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)
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);
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="string">"$expr and $ident and $pat and ..."</span>;
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<span class="kw">let</span> <span class="ident">parsed</span> <span class="op">=</span> <span class="ident">run_on</span>(<span class="ident">input</span>).<span class="ident">expect</span>(<span class="string">"run-on sentence"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">parsed</span>.<span class="ident">len</span>(), <span class="number">3</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">parsed</span>[<span class="number">0</span>], <span class="string">"expr"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">parsed</span>[<span class="number">1</span>], <span class="string">"ident"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">parsed</span>[<span class="number">2</span>], <span class="string">"pat"</span>);
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}</pre>
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