issue19482.go

     1  // errorcheck
     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  // Compiler rejected initialization of structs to composite literals
     8  // in a non-static setting (e.g. in a function)
     9  // when the struct contained a field named _.
    10  
    11  package p
    12  
    13  type T struct {
    14  	_ string
    15  }
    16  
    17  func ok() {
    18  	var x = T{"check"}
    19  	_ = x
    20  	_ = T{"et"}
    21  }
    22  
    23  var (
    24  	y = T{"stare"}
    25  	w = T{_: "look"} // ERROR "invalid field name _ in struct initializer|expected struct field name|unknown field _ in struct literal of type T"
    26  	_ = T{"page"}
    27  	_ = T{_: "out"} // ERROR "invalid field name _ in struct initializer|expected struct field name|unknown field _ in struct literal of type T"
    28  )
    29  
    30  func bad() {
    31  	var z = T{_: "verse"} // ERROR "invalid field name _ in struct initializer|expected struct field name|unknown field _ in struct literal of type T"
    32  	_ = z
    33  	_ = T{_: "itinerary"} // ERROR "invalid field name _ in struct initializer|expected struct field name|unknown field _ in struct literal of type T"
    34  }
    35
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