75 lines
1.4 KiB
Rust
75 lines
1.4 KiB
Rust
// Test the mechanism for warning about possible missing `self` declarations.
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trait CtxtFn {
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fn f8(self, _: usize) -> usize;
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fn f9(_: usize) -> usize;
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}
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trait OtherTrait {
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fn f9(_: usize) -> usize;
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}
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// Note: this trait is not implemented, but we can't really tell
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// whether or not an impl would match anyhow without a self
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// declaration to match against, so we wind up prisizeing it as a
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// candidate. This seems not unreasonable -- perhaps the user meant to
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// implement it, after all.
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trait UnusedTrait {
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fn f9(_: usize) -> usize;
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}
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impl CtxtFn for usize {
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fn f8(self, i: usize) -> usize {
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i * 4
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}
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fn f9(i: usize) -> usize {
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i * 4
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}
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}
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impl OtherTrait for usize {
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fn f9(i: usize) -> usize {
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i * 8
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}
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}
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struct Myisize(isize);
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impl Myisize {
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fn fff(i: isize) -> isize {
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i
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}
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}
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trait ManyImplTrait {
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fn is_str() -> bool {
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false
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}
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}
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impl ManyImplTrait for String {
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fn is_str() -> bool {
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true
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}
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}
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impl ManyImplTrait for usize {}
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impl ManyImplTrait for isize {}
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impl ManyImplTrait for char {}
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impl ManyImplTrait for Myisize {}
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fn no_param_bound(u: usize, m: Myisize) -> usize {
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u.f8(42) + u.f9(342) + m.fff(42)
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//~^ ERROR no method named `f9` found
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//~| ERROR no method named `fff` found
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}
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fn param_bound<T: ManyImplTrait>(t: T) -> bool {
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t.is_str()
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//~^ ERROR no method named `is_str` found
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}
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fn main() {
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}
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