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