18 lines
333 B
Rust
18 lines
333 B
Rust
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#![deny(unused_variables)]
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macro_rules! make_var {
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($struct:ident, $var:ident) => {
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let $var = $struct.$var;
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};
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}
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#[allow(unused)]
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struct MyStruct {
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var: i32,
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}
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fn main() {
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let s = MyStruct { var: 42 };
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make_var!(s, var); //~ ERROR unused variable: `var`
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let a = 1; //~ ERROR unused variable: `a`
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}
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