github.com/karrick/go@v0.0.0-20170817181416-d5b0ec858b37/test/method3.go (about)

     1  // run
     2  
     3  // Copyright 2009 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  // Test methods on slices.
     8  
     9  package main
    10  
    11  type T []int
    12  
    13  func (t T) Len() int { return len(t) }
    14  
    15  type I interface {
    16  	Len() int
    17  }
    18  
    19  func main() {
    20  	var t T = T{0, 1, 2, 3, 4}
    21  	var i I
    22  	i = t
    23  	if i.Len() != 5 {
    24  		println("i.Len", i.Len())
    25  		panic("fail")
    26  	}
    27  	if T.Len(t) != 5 {
    28  		println("T.Len", T.Len(t))
    29  		panic("fail")
    30  	}
    31  	if (*T).Len(&t) != 5 {
    32  		println("(*T).Len", (*T).Len(&t))
    33  		panic("fail")
    34  	}
    35  }