rust/tests/ui/macros/empty-trailing-stmt.rs

macro_rules! empty {
    () => { }
}

fn foo() -> bool { //~ ERROR mismatched
    { true } //~ ERROR mismatched
    empty!();
}

fn main() {}
Treat trailing semicolon as a statement in macro call See https://github.com/rust-lang/rust/issues/61733#issuecomment-716188981 We now preserve the trailing semicolon in a macro invocation, even if the macro expands to nothing. As a result, the following code no longer compiles: ```rust macro_rules! empty { () => { } } fn foo() -> bool { //~ ERROR mismatched { true } //~ ERROR mismatched empty!(); } ``` Previously, `{ true }` would be considered the trailing expression, even though there's a semicolon in `empty!();` This makes macro expansion more token-based. 2020-10-25 21:14:19 +00:00			`macro_rules! empty {`
			`() => { }`
			`}`

			`fn foo() -> bool { //~ ERROR mismatched`
			`{ true } //~ ERROR mismatched`
			`empty!();`
			`}`

			`fn main() {}`