github.com/huandu/go@v0.0.0-20151114150818-04e615e41150/test/interface/assertinline.go (about)

     1  // errorcheck -0 -d=typeassert
     2  
     3  // Copyright 2015 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  package p
     8  
     9  func assertptr(x interface{}) *int {
    10  	return x.(*int) // ERROR "type assertion inlined"
    11  }
    12  
    13  func assertptr2(x interface{}) (*int, bool) {
    14  	z, ok := x.(*int) // ERROR "type assertion inlined"
    15  	return z, ok
    16  }
    17  
    18  func assertfunc(x interface{}) func() {
    19  	return x.(func()) // ERROR "type assertion inlined"
    20  }
    21  
    22  func assertfunc2(x interface{}) (func(), bool) {
    23  	z, ok := x.(func()) // ERROR "type assertion inlined"
    24  	return z, ok
    25  }
    26  
    27  // TODO(rsc): struct{*int} is stored directly in the interface
    28  // and should be possible to fetch back out of the interface,
    29  // but more of the general data movement code needs to
    30  // realize that before we can inline the assertion.
    31  
    32  func assertstruct(x interface{}) struct{ *int } {
    33  	return x.(struct{ *int }) // ERROR "type assertion not inlined"
    34  }
    35  
    36  func assertstruct2(x interface{}) (struct{ *int }, bool) {
    37  	z, ok := x.(struct{ *int }) // ERROR "type assertion not inlined"
    38  	return z, ok
    39  }
    40  
    41  func assertbig(x interface{}) complex128 {
    42  	return x.(complex128) // ERROR "type assertion not inlined"
    43  }
    44  
    45  func assertbig2(x interface{}) (complex128, bool) {
    46  	z, ok := x.(complex128) // ERROR "type assertion not inlined"
    47  	return z, ok
    48  }
    49  
    50  func assertbig2ok(x interface{}) (complex128, bool) {
    51  	_, ok := x.(complex128) // ERROR "type assertion [(]ok only[)] inlined"
    52  	return 0, ok
    53  }