Source file test/method7.go

     1  // run
     2  
     3  // Copyright 2017 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 forms of method expressions T.m where T is
     8  // a literal type.
     9  
    10  package main
    11  
    12  var got, want string
    13  
    14  type I interface {
    15  	m()
    16  }
    17  
    18  type S struct {
    19  }
    20  
    21  func (S) m()          { got += " m()" }
    22  func (S) m1(s string) { got += " m1(" + s + ")" }
    23  
    24  type T int
    25  
    26  func (T) m2() { got += " m2()" }
    27  
    28  type Outer struct{ *Inner }
    29  type Inner struct{ s string }
    30  
    31  func (i Inner) M() string { return i.s }
    32  
    33  func main() {
    34  	// method expressions with named receiver types
    35  	I.m(S{})
    36  	want += " m()"
    37  
    38  	S.m1(S{}, "a")
    39  	want += " m1(a)"
    40  
    41  	// method expressions with literal receiver types
    42  	f := interface{ m1(string) }.m1
    43  	f(S{}, "b")
    44  	want += " m1(b)"
    45  
    46  	interface{ m1(string) }.m1(S{}, "c")
    47  	want += " m1(c)"
    48  
    49  	x := S{}
    50  	interface{ m1(string) }.m1(x, "d")
    51  	want += " m1(d)"
    52  
    53  	g := struct{ T }.m2
    54  	g(struct{ T }{})
    55  	want += " m2()"
    56  
    57  	if got != want {
    58  		panic("got" + got + ", want" + want)
    59  	}
    60  
    61  	h := (*Outer).M
    62  	got := h(&Outer{&Inner{"hello"}})
    63  	want := "hello"
    64  	if got != want {
    65  		panic("got " + got + ", want " + want)
    66  	}
    67  }
    68  

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