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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="Rewrites `NOT(expr)` into an equivalent `PartitionExpr` without introducing a unary NOT node."><title>negate_split_expr in partition::utils::split - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-17e0aaed.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="partition" data-themes="" data-resource-suffix="" data-rustdoc-version="1.96.0-nightly (ac7f9ec7d 2026-03-20)" data-channel="nightly" data-search-js="search-63369b7b.js" data-stringdex-js="stringdex-2da4960a.js" data-settings-js="settings-170eb4bf.js" ><script src="../../../static.files/storage-41dd4d93.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-5013f961.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-f7c3ffd8.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">negate_split_expr</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../partition/index.html">partition</a><span class="version">1.0.0-rc.2</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In partition::<wbr>utils::<wbr>split</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content" tabindex="-1"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../../index.html">partition</a>::<wbr><a href="../index.html">utils</a>::<wbr><a href="index.html">split</a></div><h1>Function <span class="fn">negate_<wbr>split_<wbr>expr</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../../src/partition/utils/split.rs.html#250-310">Source</a> </span></div><pre class="rust item-decl"><code>pub fn negate_split_expr(expr: &<a class="struct" href="../../expr/struct.PartitionExpr.html" title="struct partition::expr::PartitionExpr">PartitionExpr</a>) -> <a class="type" href="../../error/type.Result.html" title="type partition::error::Result">Result</a><<a class="struct" href="../../expr/struct.PartitionExpr.html" title="struct partition::expr::PartitionExpr">PartitionExpr</a>></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Rewrites <code>NOT(expr)</code> into an equivalent <code>PartitionExpr</code> without introducing a unary NOT node.</p>
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<p>Why this function exists:</p>
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<ul>
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<li><code>PartitionExpr</code> only models binary operators.</li>
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<li>Cut logic needs <code>R AND NOT(S)</code>.</li>
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<li>We therefore rewrite <code>NOT(S)</code> into an equivalent binary-expression tree.</li>
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</ul>
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<p>Rewrite rules:</p>
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<ul>
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<li>Atomic comparisons:
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<ul>
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<li><code>=</code> <-> <code>!=</code></li>
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<li><code><</code> <-> <code>>=</code></li>
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<li><code><=</code> <-> <code>></code></li>
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<li><code>></code> <-> <code><=</code></li>
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<li><code>>=</code> <-> <code><</code></li>
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</ul>
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</li>
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<li>Boolean composition:
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<ul>
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<li><code>NOT(A AND B)</code> => <code>NOT(A) OR NOT(B)</code></li>
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<li><code>NOT(A OR B)</code> => <code>NOT(A) AND NOT(B)</code></li>
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</ul>
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</li>
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</ul>
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<p>Failure behavior:</p>
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<ul>
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<li>For <code>AND/OR</code>, both sides must be <code>Operand::Expr</code>; otherwise returns <code>NoExprOperand</code>.</li>
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<li>Any unsupported shape bubbles up as an error and the caller degrades to no-split.</li>
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</ul>
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</div></details></section></div></main></body></html> |