80 lines
1.9 KiB
Rust
80 lines
1.9 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// This test is to make sure we don't just ICE if the trait
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// method for an operator is not implemented properly.
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// (In this case the mul method should take &f64 and not f64)
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// See: #11450
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use std::ops::Mul;
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struct Vec1 {
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x: f64
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}
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// Expecting value in input signature
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impl Mul<f64> for Vec1 {
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type Output = Vec1;
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fn mul(self, s: &f64) -> Vec1 {
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//~^ ERROR method `mul` has an incompatible type for trait
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Vec1 {
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x: self.x * *s
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}
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}
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}
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struct Vec2 {
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x: f64,
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y: f64
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}
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// Wrong type parameter ordering
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impl Mul<Vec2> for Vec2 {
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type Output = f64;
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fn mul(self, s: f64) -> Vec2 {
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//~^ ERROR method `mul` has an incompatible type for trait
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Vec2 {
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x: self.x * s,
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y: self.y * s
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}
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}
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}
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struct Vec3 {
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x: f64,
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y: f64,
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z: f64
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}
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// Unexpected return type
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impl Mul<f64> for Vec3 {
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type Output = i32;
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fn mul(self, s: f64) -> f64 {
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//~^ ERROR method `mul` has an incompatible type for trait
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s
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}
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}
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pub fn main() {
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// Check that the usage goes from the trait declaration:
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let x: Vec1 = Vec1 { x: 1.0 } * 2.0; // this is OK
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let x: Vec2 = Vec2 { x: 1.0, y: 2.0 } * 2.0; // trait had reversed order
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// (we no longer signal a compile error here, since the
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// error in the trait signature will cause compilation to
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// abort before we bother looking at function bodies.)
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let x: i32 = Vec3 { x: 1.0, y: 2.0, z: 3.0 } * 2.0;
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}
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