rust/tests/ui/proc-macro/meta-delim.rs

//@ aux-build:meta-delim.rs
//@ edition:2018
//@ run-pass

// Tests that we can properly deserialize a macro with strange delimiters
// See https://github.com/rust-lang/rust/pull/73569#issuecomment-650860457

extern crate meta_delim;

fn main() {
    assert_eq!("a bunch of idents", meta_delim::meta_delim!(a bunch of idents));
}
Handle `None`-delimited groups when parsing `macro_rules!` macro When a `macro_rules!` macro expands to another `macro_rules!` macro, we may see `None`-delimited groups in odd places when another crate deserializes the 'inner' macro. This commit 'unwraps' an outer `None`-delimited group to avoid breaking existing code. See https://github.com/rust-lang/rust/pull/73569#issuecomment-650860457 for more details. The proper fix is to handle `None`-delimited groups systematically throughout the parser, but that will require significant work. In the meantime, this hack lets us fix important hygiene bugs in macros 2020-06-29 13:55:28 +00:00			`//@ aux-build:meta-delim.rs`
			`//@ edition:2018`
			`//@ run-pass`

			`// Tests that we can properly deserialize a macro with strange delimiters`
			`// See https://github.com/rust-lang/rust/pull/73569#issuecomment-650860457`

			`extern crate meta_delim;`

			`fn main() {`
			`assert_eq!("a bunch of idents", meta_delim::meta_delim!(a bunch of idents));`
			`}`