30 lines
675 B
Rust
30 lines
675 B
Rust
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// revisions: rpass1 rpass2 rpass3
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// compile-flags: -Zincremental-ignore-spans
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#![feature(generic_associated_types)]
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// This test unsures that with_opt_const_param returns the
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// def_id of the N param in the Foo::Assoc GAT.
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trait Foo {
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type Assoc<const N: usize>;
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fn foo(
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&self,
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) -> Self::Assoc<{ if cfg!(rpass2) { 3 } else { 2 } }>;
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}
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impl Foo for () {
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type Assoc<const N: usize> = [(); N];
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fn foo(
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&self,
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) -> Self::Assoc<{ if cfg!(rpass2) { 3 } else { 2 } }> {
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[(); { if cfg!(rpass2) { 3 } else { 2 } }]
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}
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}
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fn main() {
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assert_eq!(
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().foo(),
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[(); { if cfg!(rpass2) { 3 } else { 2 } }]
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);
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}
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