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Source file test/fixedbugs/bug281.go

Documentation: test/fixedbugs

     1  // run
     2  
     3  // Copyright 2010 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // https://golang.org/issue/807
     8  
     9  package main
    10  
    11  type Point struct {
    12  	X, Y int64
    13  }
    14  
    15  type Rect struct {
    16  	Min, Max Point
    17  }
    18  
    19  func (p Point) Sub(q Point) Point {
    20  	return Point{p.X-q.X, p.Y-q.Y}
    21  }
    22  
    23  type Obj struct {
    24  	bbox Rect
    25  }
    26  
    27  func (o *Obj) Bbox() Rect {
    28  	return o.bbox
    29  }
    30  
    31  func (o *Obj) Points() [2]Point{
    32  	return [2]Point{o.bbox.Min, o.bbox.Max}
    33  }
    34  
    35  var x = 0
    36  
    37  func main() {
    38  	o := &Obj{Rect{Point{800, 0}, Point{}}}
    39  	p := Point{800, 300}
    40  	q := p.Sub(o.Bbox().Min)
    41  	if q.X != 0 || q.Y != 300 {
    42  		println("BUG dot: ", q.X, q.Y)
    43  		return
    44  	}
    45  	
    46  	q = p.Sub(o.Points()[0])
    47  	if q.X != 0 || q.Y != 300 {
    48  		println("BUG index const: ", q.X, q.Y)
    49  	}
    50  	
    51  	q = p.Sub(o.Points()[x])
    52  	if q.X != 0 || q.Y != 300 {
    53  		println("BUG index var: ", q.X, q.Y)
    54  	}
    55  }
    56  

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