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Source file test/initializerr.go

Documentation: test

     1  // errorcheck
     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  // Verify that erroneous initialization expressions are caught by the compiler
     8  // Does not compile.
     9  
    10  package main
    11  
    12  type S struct {
    13  	A, B, C, X, Y, Z int
    14  }
    15  
    16  type T struct {
    17  	S
    18  }
    19  
    20  var x = 1
    21  var a1 = S { 0, X: 1 }	// ERROR "mixture|undefined"
    22  var a2 = S { Y: 3, Z: 2, Y: 3 } // ERROR "duplicate"
    23  var a3 = T { S{}, 2, 3, 4, 5, 6 }	// ERROR "convert|too many"
    24  var a4 = [5]byte{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }	// ERROR "index|too many"
    25  var a5 = []byte { x: 2 }	// ERROR "index"
    26  var a6 = []byte{1: 1, 2: 2, 1: 3}	// ERROR "duplicate index"
    27  
    28  var ok1 = S { }	// should be ok
    29  var ok2 = T { S: ok1 }	// should be ok
    30  
    31  // These keys can be computed at compile time but they are
    32  // not constants as defined by the spec, so they do not trigger
    33  // compile-time errors about duplicate key values.
    34  // See issue 4555.
    35  
    36  type Key struct {X, Y int}
    37  
    38  var _ = map[Key]string{
    39  	Key{1,2}: "hello",
    40  	Key{1,2}: "world",
    41  }
    42  

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