58 lines
1.5 KiB
Rust
58 lines
1.5 KiB
Rust
// Unit test for the "user substitutions" that are annotated on each
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// node.
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// compile-flags:-Zverbose
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#![feature(rustc_attrs)]
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// Note: we reference the names T and U in the comments below.
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trait Bazoom<T> {
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fn method<U>(&self, arg: T, arg2: U) { }
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}
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impl<S, T> Bazoom<T> for S {
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}
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fn foo<'a, T>(_: T) { }
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#[rustc_dump_user_substs]
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fn main() {
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// Here: nothing is given, so we don't have any annotation.
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let x = foo;
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x(22);
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// Here: `u32` is given, which doesn't contain any lifetimes, so we don't
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// have any annotation.
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let x = foo::<u32>;
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x(22);
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let x = foo::<&'static u32>; //~ ERROR [&ReStatic u32]
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x(&22);
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// Here: we only want the `T` to be given, the rest should be variables.
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//
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// (`T` refers to the declaration of `Bazoom`)
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let x = <_ as Bazoom<u32>>::method::<_>; //~ ERROR [^0, u32, ^1]
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x(&22, 44, 66);
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// Here: all are given and definitely contain no lifetimes, so we
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// don't have any annotation.
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let x = <u8 as Bazoom<u16>>::method::<u32>;
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x(&22, 44, 66);
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// Here: all are given and we have a lifetime.
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let x = <u8 as Bazoom<&'static u16>>::method::<u32>; //~ ERROR [u8, &ReStatic u16, u32]
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x(&22, &44, 66);
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// Here: we want in particular that *only* the method `U`
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// annotation is given, the rest are variables.
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//
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// (`U` refers to the declaration of `Bazoom`)
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let y = 22_u32;
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y.method::<u32>(44, 66); //~ ERROR [^0, ^1, u32]
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// Here: nothing is given, so we don't have any annotation.
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let y = 22_u32;
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y.method(44, 66);
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}
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