58 lines
1.1 KiB
Rust
58 lines
1.1 KiB
Rust
//@ run-pass
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#![allow(non_local_definitions)]
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struct Example<const N: usize>;
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macro_rules! external_macro {
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() => {{
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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<{
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#[macro_export]
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macro_rules! const_macro { () => {{ 3 }} } inline!()
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}> {
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Example::<{ const_macro!() }>
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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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}
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gimme_a_const!(run)
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}>;
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let _ok = Example::<{ external_macro!() }>;
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let _ok: [_; gimme_a_const!(blah)] = [0,0,0];
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let _ok: [[u8; gimme_a_const!(blah)]; gimme_a_const!(blah)];
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let _ok: [u8; gimme_a_const!(blah)];
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let _ok: [u8; {
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#[macro_export]
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macro_rules! const_two { () => {{ 2 }} }
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const_two!()
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}];
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let _ok = [0; {
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#[macro_export]
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macro_rules! const_three { () => {{ 3 }} }
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const_three!()
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}];
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let _ok = [0; const_three!()];
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from_marker(make_marker());
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}
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