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test/alias.go: additional tests
R=ken2 CC=golang-dev https://golang.org/cl/5327045
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@ -9,11 +9,27 @@ package main
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// Test that error messages say what the source file says
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// (uint8 vs byte).
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import (
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"fmt"
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"utf8"
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)
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func f(byte) {}
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func g(uint8) {}
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func main() {
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var x int
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var x float64
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f(x) // ERROR "byte"
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g(x) // ERROR "uint8"
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// Test across imports.
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var ff fmt.Formatter
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var fs fmt.State
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ff.Format(fs, x) // ERROR "rune"
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utf8.RuneStart(x) // ERROR "byte"
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var s utf8.String
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s.At(x) // ERROR "int"
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}
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54
test/alias1.go
Normal file
54
test/alias1.go
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@ -0,0 +1,54 @@
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// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// Test that dynamic interface checks treat byte=uint8
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// and rune=int or rune=int32.
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func main() {
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var x interface{}
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x = byte(1)
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switch x.(type) {
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case uint8:
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// ok
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default:
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println("byte != uint8")
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}
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x = uint8(2)
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switch x.(type) {
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case byte:
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// ok
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default:
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println("uint8 != byte")
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}
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rune32 := false
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x = rune(3)
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switch x.(type) {
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case int:
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// ok
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case int32:
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// must be new code
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rune32 = true
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default:
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println("rune != int and rune != int32")
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}
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if rune32 {
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x = int32(4)
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} else {
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x = int(5)
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}
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switch x.(type) {
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case rune:
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// ok
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default:
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println("int (or int32) != rune")
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}
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}
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