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<main>
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<h1 id="inspecting-generated-code"><a class="header" href="#inspecting-generated-code">Inspecting generated code</a></h1>
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<p><code>#[rtic::app]</code> is a procedural macro that produces support code. If for some reason you need to inspect the code generated by this macro you have two options:</p>
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<p>You can inspect the file <code>rtic-expansion.rs</code> inside the <code>target</code> directory. This file contains the expansion of the <code>#[rtic::app]</code> item (not your whole program!) of the <em>last built</em> (via <code>cargo build</code> or <code>cargo check</code>) RTIC application. The expanded code is not pretty printed by default, so you'll want to run <code>rustfmt</code> on it before you read it.</p>
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<pre><code class="language-console">$ cargo build --example smallest --target thumbv7m-none-eabi
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</code></pre>
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<pre><code class="language-console">$ rustfmt target/rtic-expansion.rs
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</code></pre>
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<pre><code class="language-console">$ tail target/rtic-expansion.rs
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</code></pre>
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<pre><code class="language-rust noplayground">#[doc = r" Implementation details"]
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mod app {
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#[doc = r" Always include the device crate which contains the vector table"]
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use lm3s6965 as _;
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#[no_mangle]
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unsafe extern "C" fn main() -> ! {
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rtic::export::interrupt::disable();
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let mut core: rtic::export::Peripherals = core::mem::transmute(());
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core.SCB.scr.modify(|r| r | 1 << 1);
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rtic::export::interrupt::enable();
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loop {
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rtic::export::wfi()
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}
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}
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}</code></pre>
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<p>Or, you can use the <a href="https://crates.io/crates/cargo-expand"><code>cargo-expand</code></a> sub-command. This sub-command will expand <em>all</em> the macros, including the <code>#[rtic::app]</code> attribute, and modules in your crate and print the output to the console.</p>
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<pre><code class="language-console"># produces the same output as before
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</code></pre>
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<pre><code class="language-console">cargo expand --example smallest | tail
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</code></pre>
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