mirror of https://github.com/rust-lang/rust
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
struct Example<const N: usize>;
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macro_rules! external_macro {
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() => {{
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//~^ ERROR expected type
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const X: usize = 1337;
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X
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}}
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}
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trait Marker<const N: usize> {}
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impl<const N: usize> Marker<N> for Example<N> {}
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fn make_marker() -> impl Marker<gimme_a_const!(marker)> {
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//~^ ERROR: type provided when a constant was expected
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//~| ERROR: type provided when a constant was expected
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Example::<gimme_a_const!(marker)>
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//~^ ERROR: type provided when a constant was expected
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}
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fn from_marker(_: impl Marker<{
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#[macro_export]
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macro_rules! inline { () => {{ 3 }} }; inline!()
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}>) {}
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fn main() {
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let _ok = Example::<{
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#[macro_export]
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macro_rules! gimme_a_const {
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($rusty: ident) => {{ let $rusty = 3; *&$rusty }}
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//~^ ERROR expected type
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//~| ERROR expected type
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};
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gimme_a_const!(run)
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}>;
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let _fail = Example::<external_macro!()>;
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//~^ ERROR: type provided when a constant was expected
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let _fail = Example::<gimme_a_const!()>;
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//~^ ERROR unexpected end of macro invocation
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//~| ERROR: type provided when a constant was expected
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}
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