mirror of https://github.com/rust-lang/rust.git
43 lines
1.0 KiB
Rust
43 lines
1.0 KiB
Rust
//! Test that opaque types only pick up methods from traits in their bounds
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//! if the trait is imported.
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//!
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//! FIXME: always look through the bounds of an opaque type to see if there are
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//! methods that could be called on any of the bound traits, irrespective of
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//! imported traits.
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//@ revisions: import no_import
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//@[import] check-pass
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#[cfg(import)]
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use std::fmt::Debug as _;
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fn foo(f: &mut std::fmt::Formatter<'_>) -> impl std::fmt::Debug {
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if false {
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let x = foo(f);
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x.fmt(f);
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//[no_import]~^ ERROR: no method named `fmt` found
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}
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()
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}
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fn foo1(f: &mut std::fmt::Formatter<'_>) -> impl std::fmt::Debug {
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if false {
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let x = &mut foo(f);
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x.fmt(f);
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//[no_import]~^ ERROR: no method named `fmt` found
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}
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()
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}
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// inconsistent with this
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fn bar<T>(t: impl std::fmt::Debug, f: &mut std::fmt::Formatter<'_>) {
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t.fmt(f);
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}
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// and the desugared version, of course
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fn baz<T: std::fmt::Debug>(t: T, f: &mut std::fmt::Formatter<'_>) {
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t.fmt(f);
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}
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fn main() {}
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