go bug281 源码
golang bug281 代码
文件路径：/test/fixedbugs/bug281.go
// run
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// https://golang.org/issue/807
package main
type Point struct {
X, Y int64
}
type Rect struct {
Min, Max Point
}
func (p Point) Sub(q Point) Point {
return Point{p.X-q.X, p.Y-q.Y}
}
type Obj struct {
bbox Rect
}
func (o *Obj) Bbox() Rect {
return o.bbox
}
func (o *Obj) Points() [2]Point{
return [2]Point{o.bbox.Min, o.bbox.Max}
}
var x = 0
func main() {
o := &Obj{Rect{Point{800, 0}, Point{}}}
p := Point{800, 300}
q := p.Sub(o.Bbox().Min)
if q.X != 0 || q.Y != 300 {
println("BUG dot: ", q.X, q.Y)
return
}
q = p.Sub(o.Points()[0])
if q.X != 0 || q.Y != 300 {
println("BUG index const: ", q.X, q.Y)
}
q = p.Sub(o.Points()[x])
if q.X != 0 || q.Y != 300 {
println("BUG index var: ", q.X, q.Y)
}
}
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