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// Copyright 2014 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.
// This test is to make sure we don't just ICE if the trait
// method for an operator is not implemented properly.
// (In this case the mul method should take &f64 and not f64)
// See: #11450
use std::ops::Mul;
struct Vec1 {
x: f64
}
// Expecting value in input signature
impl Mul<f64> for Vec1 {
type Output = Vec1;
fn mul(self, s: &f64) -> Vec1 {
//~^ ERROR method `mul` has an incompatible type for trait
Vec1 {
x: self.x * *s
}
}
}
struct Vec2 {
x: f64,
y: f64
}
// Wrong type parameter ordering
impl Mul<Vec2> for Vec2 {
type Output = f64;
fn mul(self, s: f64) -> Vec2 {
//~^ ERROR method `mul` has an incompatible type for trait
Vec2 {
x: self.x * s,
y: self.y * s
}
}
}
struct Vec3 {
x: f64,
y: f64,
z: f64
}
// Unexpected return type
impl Mul<f64> for Vec3 {
type Output = i32;
fn mul(self, s: f64) -> f64 {
//~^ ERROR method `mul` has an incompatible type for trait
s
}
}
pub fn main() {
// Check that the usage goes from the trait declaration:
let x: Vec1 = Vec1 { x: 1.0 } * 2.0; // this is OK
let x: Vec2 = Vec2 { x: 1.0, y: 2.0 } * 2.0; // trait had reversed order
// (we no longer signal a compile error here, since the
// error in the trait signature will cause compilation to
// abort before we bother looking at function bodies.)
let x: i32 = Vec3 { x: 1.0, y: 2.0, z: 3.0 } * 2.0;
}
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