bookspec/target/doc/bookspec_checker/derive/index.html

<!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="The specification’s own checker (`plan/served.md` P13 step 5): every example’s expected figures derived from its rule’s symbolic form, by an engine-free reference model with exact decimals."><title>bookspec_checker::derive - 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-0c87338a.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="bookspec_checker" data-themes="" data-resource-suffix="" data-rustdoc-version="1.99.1 (58cf8f9c3 2026-10-13)" data-channel="1.99.1" data-search-js="search-cf4fc35e.js" data-stringdex-js="stringdex-b5109af9.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-417ebf0a.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-9f56287d.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 mod"><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="#">Module derive</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../bookspec_checker/index.html">bookspec_<wbr>checker</a><span class="version">0.1.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module derive</a></h2><h3><a href="#structs">Module Items</a></h3><ul class="block"><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#enums" title="Enums">Enums</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="../index.html">In crate bookspec_<wbr>checker</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">bookspec_checker</a></div><h1>Module <span>derive</span>&nbsp;<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/bookspec_checker/derive.rs.html#1-680">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The specification’s own checker (<code>plan/served.md</code> P13 step 5):
every example’s expected figures derived from its rule’s symbolic
form, by an engine-free reference model with exact decimals.</p>
<p>The runner asks an <em>engine</em> whether it agrees with an example. This
module asks whether the <em>example</em> agrees with the specification: it
replays the example’s events on the smallest ledger the rules of
<code>bookspec/spec/*.md</code> describe (entries, reversals, a close, a bill, an
invoice) and computes each expectation it can from the symbolic forms
(<code>sum</code> of signed values, normal balances, the accounting equation,
net income). An expectation whose figure disagrees with the
derivation, or an event whose refusal the rules do not justify, fails
the specification’s build, before any engine is consulted.</p>
<p>What the model does not cover (depreciation, schedules, members,
1099s, formats, the cash-flow sections) is not derived here: an
expectation is <a href="enum.Derived.html#variant.Skipped" title="variant bookspec_checker::derive::Derived::Skipped"><code>Derived::Skipped</code></a> with the reason, never silently
passed, and the example is still checked by the engines.</p>
</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.Derivation.html" title="struct bookspec_checker::derive::Derivation">Derivation</a></dt><dd>The derivation of one example: one result per event that was refused
and per expectation.</dd></dl><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><dl class="item-table"><dt><a class="enum" href="enum.Derived.html" title="enum bookspec_checker::derive::Derived">Derived</a></dt><dd>What the derivation found of one expectation or event.</dd></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.derive.html" title="fn bookspec_checker::derive::derive">derive</a></dt><dd>Derive what the specification says about <code>ex</code>.</dd></dl></section></div></main></body></html>