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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 `crates/lowering/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script>
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</pre><pre class="rust"><code><span class="doccomment">//! Fe Lowering.</span>
<span class="kw">use</span> <span class="ident">fe_analyzer::namespace::items</span>::{<span class="ident">Ingot</span>, <span class="ident">IngotId</span>, <span class="ident">Module</span>, <span class="ident">ModuleId</span>, <span class="ident">ModuleSource</span>};
<span class="kw">mod</span> <span class="ident">ast_utils</span>;
<span class="kw">mod</span> <span class="ident">context</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">db</span>;
<span class="kw">mod</span> <span class="ident">mappers</span>;
<span class="kw">mod</span> <span class="ident">names</span>;
<span class="kw">mod</span> <span class="ident">utils</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::db</span>::{<span class="ident">LoweringDb</span>, <span class="ident">TestDb</span>};
<span class="kw">use</span> <span class="ident">std::rc::Rc</span>;
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">lower_main_module</span>(<span class="ident">db</span>: <span class="kw-2">&mut</span> <span class="kw">dyn</span> <span class="ident">LoweringDb</span>, <span class="ident">module</span>: <span class="ident">ModuleId</span>) -> <span class="ident">ModuleId</span> {
<span class="kw">let</span> <span class="ident">original_ingot</span> <span class="op">=</span> <span class="ident">module</span>.<span class="ident">ingot</span>(<span class="ident">db</span>.<span class="ident">upcast</span>());
<span class="kw">let</span> <span class="ident">lowered_ingot</span> <span class="op">=</span> <span class="ident">lower_ingot</span>(<span class="ident">db</span>, <span class="ident">original_ingot</span>);
<span class="kw">let</span> <span class="ident">lowered_mod</span> <span class="op">=</span> <span class="ident">lowered_ingot</span>
.<span class="ident">root_module</span>(<span class="ident">db</span>.<span class="ident">upcast</span>())
.<span class="ident">expect</span>(<span class="string">"lowered ingot has no main module"</span>);
<span class="ident">lowered_mod</span>
}
<span class="doccomment">/// Lower every module of an ingot.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Creates a new `IngotId` and new `ModuleId`s for the ingot's modules.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">lower_ingot</span>(<span class="ident">db</span>: <span class="kw-2">&mut</span> <span class="kw">dyn</span> <span class="ident">LoweringDb</span>, <span class="ident">ingot</span>: <span class="ident">IngotId</span>) -> <span class="ident">IngotId</span> {
<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="ident">ingot</span>.<span class="ident">data</span>(<span class="ident">db</span>.<span class="ident">upcast</span>());
<span class="kw">let</span> <span class="ident">lowered_ingot</span> <span class="op">=</span> <span class="ident">db</span>.<span class="ident">intern_ingot</span>(<span class="ident">Rc::new</span>(<span class="ident">Ingot</span> {
<span class="ident">name</span>: <span class="ident">data</span>.<span class="ident">name</span>.<span class="ident">clone</span>(),
<span class="ident">mode</span>: <span class="ident">data</span>.<span class="ident">mode</span>,
<span class="ident">original</span>: <span class="prelude-val">Some</span>(<span class="ident">ingot</span>),
<span class="ident">src_dir</span>: <span class="ident">data</span>.<span class="ident">src_dir</span>.<span class="ident">clone</span>(),
}));
<span class="kw">let</span> <span class="ident">lowered_mods</span> <span class="op">=</span> <span class="ident">ingot</span>
.<span class="ident">all_modules</span>(<span class="ident">db</span>.<span class="ident">upcast</span>())
.<span class="ident">iter</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">module</span><span class="op">|</span> <span class="ident">lower_module</span>(<span class="ident">db</span>, <span class="kw-2">*</span><span class="ident">module</span>, <span class="ident">lowered_ingot</span>))
.<span class="ident">collect</span>();
<span class="kw">let</span> <span class="ident">lowered_deps</span> <span class="op">=</span> <span class="ident">ingot</span>
.<span class="ident">external_ingots</span>(<span class="ident">db</span>.<span class="ident">upcast</span>())
.<span class="ident">iter</span>()
.<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">name</span>, <span class="ident">ing</span>)<span class="op">|</span> (<span class="ident">name</span>.<span class="ident">clone</span>(), <span class="ident">lower_ingot</span>(<span class="ident">db</span>, <span class="kw-2">*</span><span class="ident">ing</span>)))
.<span class="ident">collect</span>();
<span class="ident">db</span>.<span class="ident">set_ingot_modules</span>(<span class="ident">lowered_ingot</span>, <span class="ident">lowered_mods</span>);
<span class="ident">db</span>.<span class="ident">set_ingot_external_ingots</span>(<span class="ident">lowered_ingot</span>, <span class="ident">Rc::new</span>(<span class="ident">lowered_deps</span>));
<span class="ident">lowered_ingot</span>
}
<span class="kw">fn</span> <span class="ident">lower_module</span>(<span class="ident">db</span>: <span class="kw-2">&</span><span class="kw">dyn</span> <span class="ident">LoweringDb</span>, <span class="ident">module</span>: <span class="ident">ModuleId</span>, <span class="ident">lowered_ingot</span>: <span class="ident">IngotId</span>) -> <span class="ident">ModuleId</span> {
<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="ident">module</span>.<span class="ident">data</span>(<span class="ident">db</span>.<span class="ident">upcast</span>());
<span class="macro">assert!</span>(
<span class="op">!</span><span class="macro">matches!</span>(<span class="ident">data</span>.<span class="ident">source</span>, <span class="ident">ModuleSource::Lowered</span> { .. }),
<span class="string">"lowering an already lowered module"</span>
);
<span class="ident">db</span>.<span class="ident">intern_module</span>(<span class="ident">Rc::new</span>(<span class="ident">Module</span> {
<span class="ident">name</span>: <span class="ident">data</span>.<span class="ident">name</span>.<span class="ident">clone</span>(),
<span class="ident">ingot</span>: <span class="ident">lowered_ingot</span>,
<span class="ident">source</span>: <span class="ident">ModuleSource::Lowered</span> {
<span class="ident">original</span>: <span class="ident">module</span>,
<span class="ident">ast</span>: <span class="ident">db</span>.<span class="ident">lowered_module_ast</span>(<span class="ident">module</span>),
},
}))
}
</code></pre></div>
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