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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
mod mul1 {
pub trait Mul {}
}
mod mul2 {
pub trait Mul {}
}
mod mul3 {
enum Mul {
Yes,
No
}
}
mod mul4 {
type Mul = String;
}
mod mul5 {
struct Mul{
left_term: u32,
right_term: u32
}
}
#[derive(Debug)]
struct Foo;
// When we comment the next line:
//use mul1::Mul;
// BEFORE, we got the following error for the `impl` below:
// error: use of undeclared trait name `Mul` [E0405]
// AFTER, we get this message:
// error: trait `Mul` is not in scope.
// help: ...
// help: you can import several candidates into scope (`use ...;`):
// help: `mul1::Mul`
// help: `mul2::Mul`
// help: `std::ops::Mul`
impl Mul for Foo {
//~^ ERROR trait `Mul` is not in scope
//~| HELP `mul1::Mul`
//~| HELP `mul2::Mul`
//~| HELP `std::ops::Mul`
//~| HELP run `rustc --explain E0405` to see a detailed explanation
//~| HELP you can import several candidates into scope (`use ...;`):
}
// BEFORE, we got:
// error: use of undeclared type name `Mul` [E0412]
// AFTER, we get:
// error: type name `Mul` is not in scope. Maybe you meant:
// help: ...
// help: you can import several candidates into scope (`use ...;`):
// help: `mul1::Mul`
// help: `mul2::Mul`
// help: `mul3::Mul`
// help: `mul4::Mul`
// help: and 2 other candidates
fn getMul() -> Mul {
//~^ ERROR type name `Mul` is undefined or not in scope
//~| HELP `mul1::Mul`
//~| HELP `mul2::Mul`
//~| HELP `mul3::Mul`
//~| HELP `mul4::Mul`
//~| HELP and 2 other candidates
//~| HELP run `rustc --explain E0412` to see a detailed explanation
//~| HELP you can import several candidates into scope (`use ...;`):
}
// Let's also test what happens if the trait doesn't exist:
impl ThisTraitReallyDoesntExistInAnyModuleReally for Foo {
//~^ ERROR trait `ThisTraitReallyDoesntExistInAnyModuleReally` is not in scope
//~^^ HELP run `rustc --explain E0405` to see a detailed explanation
//~^^^ HELP no candidates by the name of `ThisTraitReallyDoesntExistInAnyModuleReally` found
}
// Let's also test what happens if there's just one alternative:
impl Div for Foo {
//~^ ERROR trait `Div` is not in scope
//~| HELP `use std::ops::Div;`
//~| HELP run `rustc --explain E0405` to see a detailed explanation
}
fn main() {
let foo = Foo();
println!("Hello, {:?}!", foo);
}
|
