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authorjohannst <johannst@users.noreply.github.com>2021-09-13 22:26:20 +0000
committerjohannst <johannst@users.noreply.github.com>2021-09-13 22:26:20 +0000
commita47dfd3d1417412f4d55ffa964d9fc98d8d53a9d (patch)
tree417f70d1193d09d22b37ec49b905b03fc916366f /src/llvm_kaleidoscope_rs/lib.rs.html
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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="Source of the Rust file `src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs - source</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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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+<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">&#9776;</div><a href='../../llvm_kaleidoscope_rs/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1"> 1</span>
+<span id="2"> 2</span>
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+<span id="109">109</span>
+</pre><pre class="rust">
+<span class="kw">use</span> <span class="ident">std::convert::TryFrom</span>;
+
+<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">codegen</span>;
+<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">lexer</span>;
+<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">llvm</span>;
+<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">parser</span>;
+
+<span class="doccomment">/// Fixed size of [`SmallCStr`] including the trailing `\0` byte.</span>
+<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SMALL_STR_SIZE</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">16</span>;
+
+<span class="doccomment">/// Small C string on the stack with fixed size [`SMALL_STR_SIZE`].</span>
+<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>)]</span>
+<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SmallCStr</span>([<span class="ident">u8</span>; <span class="ident">SMALL_STR_SIZE</span>]);
+
+<span class="kw">impl</span> <span class="ident">SmallCStr</span> {
+ <span class="doccomment">/// Create a new C string from `src`.</span>
+ <span class="doccomment">/// Returns [`None`] if `src` exceeds the fixed size or contains any `\0` bytes.</span>
+ <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op">&lt;</span><span class="ident">T</span>: <span class="ident">AsRef</span><span class="op">&lt;</span>[<span class="ident">u8</span>]<span class="op">&gt;</span><span class="op">&gt;</span>(<span class="ident">src</span>: <span class="kw-2">&amp;</span><span class="ident">T</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">SmallCStr</span><span class="op">&gt;</span> {
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">as_ref</span>();
+ <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">len</span>();
+
+ <span class="comment">// Check for \0 bytes.</span>
+ <span class="kw">let</span> <span class="ident">contains_null</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="op">!</span><span class="ident">libc::memchr</span>(<span class="ident">src</span>.<span class="ident">as_ptr</span>().<span class="ident">cast</span>(), <span class="number">0</span>, <span class="ident">len</span>).<span class="ident">is_null</span>() };
+
+ <span class="kw">if</span> <span class="ident">contains_null</span> <span class="op">|</span><span class="op">|</span> <span class="ident">len</span> <span class="op">&gt;</span> <span class="ident">SMALL_STR_SIZE</span> <span class="op">-</span> <span class="number">1</span> {
+ <span class="prelude-val">None</span>
+ } <span class="kw">else</span> {
+ <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dest</span> <span class="op">=</span> [<span class="number">0</span>; <span class="ident">SMALL_STR_SIZE</span>];
+ <span class="ident">dest</span>[..<span class="ident">len</span>].<span class="ident">copy_from_slice</span>(<span class="ident">src</span>);
+ <span class="prelude-val">Some</span>(<span class="ident">SmallCStr</span>(<span class="ident">dest</span>))
+ }
+ }
+
+ <span class="doccomment">/// Return pointer to C string.</span>
+ <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">as_ptr</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc::c_char</span> {
+ <span class="self">self</span>.<span class="number">0</span>.<span class="ident">as_ptr</span>().<span class="ident">cast</span>()
+ }
+}
+
+<span class="kw">impl</span> <span class="ident">TryFrom</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">SmallCStr</span> {
+ <span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> ();
+
+ <span class="kw">fn</span> <span class="ident">try_from</span>(<span class="ident">value</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="self">Self</span>, <span class="self">Self</span><span class="ident">::Error</span><span class="op">&gt;</span> {
+ <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">value</span>).<span class="ident">ok_or</span>(())
+ }
+}
+
+<span class="doccomment">/// Either type, for APIs accepting two types.</span>
+<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Either</span><span class="op">&lt;</span><span class="ident">A</span>, <span class="ident">B</span><span class="op">&gt;</span> {
+ <span class="ident">A</span>(<span class="ident">A</span>),
+ <span class="ident">B</span>(<span class="ident">B</span>),
+}
+
+<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
+<span class="kw">mod</span> <span class="ident">test</span> {
+ <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">SmallCStr</span>, <span class="ident">SMALL_STR_SIZE</span>};
+ <span class="kw">use</span> <span class="ident">std::convert::TryInto</span>;
+
+ <span class="attribute">#[<span class="ident">test</span>]</span>
+ <span class="kw">fn</span> <span class="ident">test_create</span>() {
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="string">&quot;\x30\x31\x32\x33&quot;</span>;
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>).<span class="ident">unwrap</span>();
+ <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span><span class="ident">scs</span>.<span class="number">0</span>[..<span class="number">5</span>], <span class="kw-2">&amp;</span>[<span class="number">0x30</span>, <span class="number">0x31</span>, <span class="number">0x32</span>, <span class="number">0x33</span>, <span class="number">0x00</span>]);
+
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="string">b&quot;abcd1234&quot;</span>;
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>).<span class="ident">unwrap</span>();
+ <span class="macro">assert_eq!</span>(
+ <span class="kw-2">&amp;</span><span class="ident">scs</span>.<span class="number">0</span>[..<span class="number">9</span>],
+ <span class="kw-2">&amp;</span>[<span class="number">0x61</span>, <span class="number">0x62</span>, <span class="number">0x63</span>, <span class="number">0x64</span>, <span class="number">0x31</span>, <span class="number">0x32</span>, <span class="number">0x33</span>, <span class="number">0x34</span>, <span class="number">0x00</span>]
+ );
+ }
+
+ <span class="attribute">#[<span class="ident">test</span>]</span>
+ <span class="kw">fn</span> <span class="ident">test_contain_null</span>() {
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="string">&quot;\x30\x00\x32\x33&quot;</span>;
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>);
+ <span class="macro">assert_eq!</span>(<span class="ident">scs</span>, <span class="prelude-val">None</span>);
+
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="string">&quot;\x30\x31\x32\x33\x00&quot;</span>;
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>);
+ <span class="macro">assert_eq!</span>(<span class="ident">scs</span>, <span class="prelude-val">None</span>);
+ }
+
+ <span class="attribute">#[<span class="ident">test</span>]</span>
+ <span class="kw">fn</span> <span class="ident">test_too_large</span>() {
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> (<span class="number">0</span>..<span class="ident">SMALL_STR_SIZE</span>).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="string">&#39;a&#39;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>();
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>);
+ <span class="macro">assert_eq!</span>(<span class="ident">scs</span>, <span class="prelude-val">None</span>);
+
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> (<span class="number">0</span>..<span class="ident">SMALL_STR_SIZE</span> <span class="op">+</span> <span class="number">10</span>).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="string">&#39;a&#39;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>();
+ <span class="kw">let</span> <span class="ident">scs</span> <span class="op">=</span> <span class="ident">SmallCStr::new</span>(<span class="kw-2">&amp;</span><span class="ident">src</span>);
+ <span class="macro">assert_eq!</span>(<span class="ident">scs</span>, <span class="prelude-val">None</span>);
+ }
+
+ <span class="attribute">#[<span class="ident">test</span>]</span>
+ <span class="kw">fn</span> <span class="ident">test_try_into</span>() {
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="string">&quot;\x30\x31\x32\x33&quot;</span>;
+ <span class="kw">let</span> <span class="ident">scs</span>: <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SmallCStr</span>, ()<span class="op">&gt;</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">try_into</span>();
+ <span class="macro">assert!</span>(<span class="ident">scs</span>.<span class="ident">is_ok</span>());
+
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> (<span class="number">0</span>..<span class="ident">SMALL_STR_SIZE</span>).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="string">&#39;a&#39;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>();
+ <span class="kw">let</span> <span class="ident">scs</span>: <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SmallCStr</span>, ()<span class="op">&gt;</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">as_str</span>().<span class="ident">try_into</span>();
+ <span class="macro">assert!</span>(<span class="ident">scs</span>.<span class="ident">is_err</span>());
+
+ <span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> (<span class="number">0</span>..<span class="ident">SMALL_STR_SIZE</span> <span class="op">+</span> <span class="number">10</span>).<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="string">&#39;a&#39;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>();
+ <span class="kw">let</span> <span class="ident">scs</span>: <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">SmallCStr</span>, ()<span class="op">&gt;</span> <span class="op">=</span> <span class="ident">src</span>.<span class="ident">as_str</span>().<span class="ident">try_into</span>();
+ <span class="macro">assert!</span>(<span class="ident">scs</span>.<span class="ident">is_err</span>());
+ }
+}
+</pre></div>
+</section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="llvm_kaleidoscope_rs" data-search-index-js="../../search-index.js" data-search-js="../../search.js"></div><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script></body></html> \ No newline at end of file
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