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