issue9017.go

     1  // errorcheck
     2  
     3  // Copyright 2014 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  // Issue 9017: Method selector shouldn't automatically dereference a named pointer type.
     8  
     9  package main
    10  
    11  type T struct{ x int }
    12  
    13  func (T) mT() {}
    14  
    15  type S struct {
    16  	T
    17  }
    18  
    19  func (S) mS() {}
    20  
    21  type P *S
    22  
    23  type I interface {
    24  	mT()
    25  }
    26  
    27  func main() {
    28  	var s S
    29  	s.T.mT()
    30  	s.mT() // == s.T.mT()
    31  
    32  	var i I
    33  	_ = i
    34  	i = s.T
    35  	i = s
    36  
    37  	var ps = &s
    38  	ps.mS()
    39  	ps.T.mT()
    40  	ps.mT() // == ps.T.mT()
    41  
    42  	i = ps.T
    43  	i = ps
    44  
    45  	var p P = ps
    46  	(*p).mS()
    47  	p.mS() // ERROR "undefined"
    48  
    49  	i = *p
    50  	i = p // ERROR "cannot use|incompatible types"
    51  
    52  	p.T.mT()
    53  	p.mT() // ERROR "undefined"
    54  
    55  	i = p.T
    56  	i = p // ERROR "cannot use|incompatible types"
    57  }
    58
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