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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `quick_error` macro in crate `error_chain`."><meta name="keywords" content="rust, rustlang, rust-lang, quick_error"><title>error_chain::quick_error - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc macro"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><div class="sidebar-elems"><p class='location'><a href='index.html'>error_chain</a></p><script>window.sidebarCurrent = {name: 'quick_error', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>error_chain</a>::<wbr><a class="macro" href=''>quick_error</a></span><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../src/error_chain/quick_error.rs.html#7-529' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class="rust macro">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">quick_error</span> {
( $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">chunks</span>:<span class="ident">tt</span>)<span class="op">*</span> }
) <span class="op">=&gt;</span> { ... };
( $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span>
<span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">chunks</span>:<span class="ident">tt</span>)<span class="op">*</span> }
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [<span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [ ]
<span class="ident">queue</span> [ ]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [<span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [ ]
<span class="ident">queue</span> [ ]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">queue</span> [ <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">qmeta</span>:<span class="ident">meta</span>]</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">queue</span> [ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qitem</span>:<span class="ident">ident</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">btyp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] ]
<span class="ident">queue</span> [ <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">qmeta</span>:<span class="ident">meta</span>]</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span> [ ] ]
<span class="ident">queue</span> [($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qtyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span> [ ] ]
<span class="ident">queue</span> [{ $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qtyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>} $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span> <span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span> [ ] ]
<span class="ident">queue</span> [{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qtyp</span>:<span class="ident">ty</span> ),<span class="op">+</span> ,} $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">btyp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] ]
<span class="ident">queue</span> [ {$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qfuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">btyp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] ]
<span class="ident">queue</span> [ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qitem</span>:<span class="ident">ident</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">SORT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">items</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ivar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ityp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ifuncs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">buf</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bitem</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bmode</span>:<span class="ident">tt</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">bvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">btyp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] ]
<span class="ident">queue</span> [ ]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ENUM_DEFINITION</span> [<span class="kw">pub</span> <span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">body</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span> ($(($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ttyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>))<span class="kw-2">*</span>) {$({$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">svar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">styp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>})<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">queue</span> [ ]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ENUM_DEFINITION</span> [<span class="kw">enum</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> $( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">meta</span>:<span class="ident">meta</span>]</span> )<span class="kw-2">*</span>]
<span class="ident">body</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span> ($(($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ttyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>))<span class="kw-2">*</span>) {$({$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">svar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">styp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>})<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">queue</span> [ ]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ENUM_DEFINITION</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">body</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span> ($(($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ttyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>))<span class="kw-2">*</span>) {$({$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">svar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">styp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>})<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">queue</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">qmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qitem</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span> [ ] $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">queue</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ENUM_DEFINITION</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">body</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span> ($(($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ttyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>))<span class="kw-2">*</span>) {$({$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">svar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">styp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>})<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">queue</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">qmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qitem</span>:<span class="ident">ident</span>: <span class="ident">TUPLE</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qtyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>] $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">queue</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ENUM_DEFINITION</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">def</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
<span class="ident">body</span> [$($( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iitem</span>:<span class="ident">ident</span> ($(($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ttyp</span>:<span class="ident">ty</span> ),<span class="op">+</span>))<span class="kw-2">*</span>) {$({$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">svar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">styp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>})<span class="kw-2">*</span>} )<span class="op">*</span> ]
<span class="ident">queue</span> [$( <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">qmeta</span>:<span class="ident">meta</span>]</span> )<span class="op">*</span>
<span class="op">=&gt;</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qitem</span>:<span class="ident">ident</span>: <span class="ident">STRUCT</span> [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">qtyp</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">queue</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">IMPLEMENTATIONS</span>
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> {$(
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> [$(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>] [$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>] {$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">funcs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
)<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DISPLAY_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
{ <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">self_</span>:<span class="ident">tt</span>) <span class="op">-&gt;</span> ($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">exprs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DISPLAY_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
{ <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">pattern</span>:<span class="ident">expr</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DISPLAY_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
{ <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">pattern</span>:<span class="ident">expr</span>, $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">exprs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DISPLAY_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
{ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DISPLAY_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
{ }
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DESCRIPTION_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">me</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">ident</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ <span class="ident">description</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DESCRIPTION_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">me</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">ident</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_DESCRIPTION_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">me</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">ident</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ }
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_CAUSE_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ <span class="ident">cause</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_CAUSE_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_CAUSE_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
{ }
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{ <span class="ident">from</span>() $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span>
[ ]
{ <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">TUPLE</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{ <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) <span class="op">-&gt;</span> ($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">texpr</span>:<span class="ident">expr</span> ),<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">STRUCT</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{ <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) <span class="op">-&gt;</span> {$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">texpr</span>:<span class="ident">expr</span> ),<span class="kw-2">*</span>} $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>}
) <span class="op">=&gt;</span> { ... };
(<span class="ident">FIND_FROM_IMPL</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
{ }
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_BODY</span> $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span>
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_BODY</span> $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">TUPLE</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_BODY</span> $(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">imeta</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">STRUCT</span>
[$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">typ</span>:<span class="ident">ty</span> ),<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_PATTERN</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">UNIT</span> []
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_PATTERN</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">TUPLE</span>
[$( <span class="kw-2">ref</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ITEM_PATTERN</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ident</span>: <span class="ident">STRUCT</span>
[$( <span class="kw-2">ref</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">var</span>:<span class="ident">ident</span> ),<span class="kw-2">*</span>]
) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">self_</span>:<span class="ident">tt</span>) <span class="op">-&gt;</span> ($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">exprs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">pattern</span>: <span class="ident">expr</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">display</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">pattern</span>: <span class="ident">expr</span>, $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">exprs</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">description</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">cause</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>) $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">from</span>() $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="ident">TUPLE</span> <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) <span class="op">-&gt;</span> ($( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span> ),<span class="kw-2">*</span>) $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="ident">STRUCT</span> <span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fvar</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ftyp</span>:<span class="ident">ty</span>) <span class="op">-&gt;</span> {$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">v</span>:<span class="ident">ident</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span> ),<span class="kw-2">*</span>} $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tail</span>:<span class="ident">tt</span> )<span class="kw-2">*</span>) <span class="op">=&gt;</span> { ... };
(<span class="ident">ERROR_CHECK</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">imode</span>:<span class="ident">tt</span> ) <span class="op">=&gt;</span> { ... };
(<span class="ident">IDENT</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=&gt;</span> { ... };
}</pre>
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