40 lines
888 B
Rust
40 lines
888 B
Rust
//@ run-pass
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#![warn(unused_parens)]
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#![allow(dead_code)]
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trait Foo {
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fn bar();
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fn tar();
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}
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macro_rules! unused_parens {
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($ty:ident) => {
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impl<$ty: Foo> Foo for ($ty,) {
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fn bar() { <$ty>::bar() }
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fn tar() {}
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}
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};
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($ty:ident $(, $rest:ident)*) => {
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impl<$ty: Foo, $($rest: Foo),*> Foo for ($ty, $($rest),*) {
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fn bar() {
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<$ty>::bar();
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<($($rest),*)>::bar() //~WARN unnecessary parentheses around type
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}
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fn tar() {
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let (_t) = 1; //~WARN unnecessary parentheses around pattern
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//~| WARN unnecessary parentheses around pattern
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let (_t1,) = (1,);
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let (_t2, _t3) = (1, 2);
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}
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}
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unused_parens!($($rest),*);
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}
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}
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unused_parens!(T1, T2, T3);
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fn main() {}
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