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https://github.com/golang/go
synced 2024-11-18 04:14:49 -07:00
fc0dc04095
Very few of the compiler regression tests include a comment saying waht they do. Many are obvious, some are anything but. I've started with a-c in the top directory. More will follow once we agree on the approach, correctness, and thoroughness here. zerodivide.go sneaked in too. R=rsc, r CC=golang-dev https://golang.org/cl/5656100
55 lines
812 B
Go
55 lines
812 B
Go
// run
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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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// Test that dynamic interface checks treat byte=uint8
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// and rune=int or rune=int32.
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package main
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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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