mirror of https://github.com/rust-lang/rust
32 lines
638 B
Rust
32 lines
638 B
Rust
//@ run-pass
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#[allow(dead_code)]
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fn macros() {
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macro_rules! foo{
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($p:pat, $e:expr, $b:block) => {{
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while let $p = $e $b
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//~^ WARN irrefutable `while let`
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//~| WARN irrefutable `while let`
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}}
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}
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macro_rules! bar{
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($p:pat, $e:expr, $b:block) => {{
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foo!($p, $e, $b)
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}}
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}
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foo!(_a, 1, {
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println!("irrefutable pattern");
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});
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bar!(_a, 1, {
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println!("irrefutable pattern");
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});
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}
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pub fn main() {
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while let _a = 1 { //~ WARN irrefutable `while let`
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println!("irrefutable pattern");
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break;
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}
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}
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