[rustc.git] / src / test / ui / issues / issue-41803.rs

// run-pass
/// A compile-time map from identifiers to arbitrary (heterogeneous) expressions
macro_rules! ident_map {
    ( $name:ident = { $($key:ident => $e:expr,)* } ) => {
        macro_rules! $name {
            $(
                ( $key ) => { $e };
            )*
            // Empty invocation expands to nothing. Needed when the map is empty.
            () => {};
        }
    };
}

ident_map!(my_map = {
    main => 0,
});

fn main() {
    my_map!(main);
}
Commit	Line	Data
b7449926	1	// run-pass
cc61c64b XL	2	/// A compile-time map from identifiers to arbitrary (heterogeneous) expressions
	3	macro_rules! ident_map {
	4	( $name:ident = { $($key:ident => $e:expr,)* } ) => {
	5	macro_rules! $name {
	6	$(
	7	( $key ) => { $e };
	8	)*
	9	// Empty invocation expands to nothing. Needed when the map is empty.
	10	() => {};
	11	}
	12	};
	13	}
	14
	15	ident_map!(my_map = {
	16	main => 0,
	17	});
	18
7453a54e	19	fn main() {
cc61c64b	20	my_map!(main);
223e47cc	21	}