mirror of
https://github.com/golang/go
synced 2024-11-23 19:30:05 -07:00
78ebe2b392
R=r DELTA=81 (57 added, 24 deleted, 0 changed) OCL=34991 CL=34996
282 lines
4.6 KiB
Go
282 lines
4.6 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 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 basic operations on named types are valid
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// and preserve the type.
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package main
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type Array [10]byte
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type Bool bool
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type Chan chan int
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type Float float
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type Int int
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type Map map[int]byte
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type Slice []byte
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type String string
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// Calling these functions checks at compile time that the argument
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// can be converted implicitly to (used as) the given type.
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func asArray(Array) {}
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func asBool(Bool) {}
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func asChan(Chan) {}
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func asFloat(Float) {}
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func asInt(Int) {}
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func asMap(Map) {}
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func asSlice(Slice) {}
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func asString(String) {}
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func (Map) M() {}
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// These functions check at run time that the default type
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// (in the absence of any implicit conversion hints)
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// is the given type.
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func isArray(x interface{}) { _ = x.(Array) }
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func isBool(x interface{}) { _ = x.(Bool) }
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func isChan(x interface{}) { _ = x.(Chan) }
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func isFloat(x interface{}) { _ = x.(Float) }
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func isInt(x interface{}) { _ = x.(Int) }
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func isMap(x interface{}) { _ = x.(Map) }
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func isSlice(x interface{}) { _ = x.(Slice) }
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func isString(x interface{}) { _ = x.(String) }
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func main() {
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var (
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a Array;
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b Bool = true;
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c Chan = make(Chan);
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f Float = 1;
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i Int = 1;
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m Map = make(Map);
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slice Slice = make(Slice, 10);
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str String = "hello";
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)
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asArray(a);
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isArray(a);
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asArray(*&a);
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isArray(*&a);
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asArray(Array{});
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isArray(Array{});
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asBool(b);
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isBool(b);
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asBool(!b);
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isBool(!b);
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asBool(true);
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asBool(*&b);
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isBool(*&b);
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asBool(Bool(true));
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isBool(Bool(true));
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asChan(c);
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isChan(c);
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asChan(make(Chan));
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isChan(make(Chan));
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asChan(*&c);
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isChan(*&c);
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asChan(Chan(nil));
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isChan(Chan(nil));
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asFloat(f);
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isFloat(f);
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asFloat(-f);
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isFloat(-f);
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asFloat(+f);
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isFloat(+f);
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asFloat(f+1);
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isFloat(f+1);
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asFloat(1+f);
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isFloat(1+f);
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asFloat(f+f);
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isFloat(f+f);
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f++;
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f+=2;
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asFloat(f-1);
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isFloat(f-1);
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asFloat(1-f);
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isFloat(1-f);
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asFloat(f-f);
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isFloat(f-f);
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f--;
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f-=2;
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asFloat(f*2.5);
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isFloat(f*2.5);
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asFloat(2.5*f);
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isFloat(2.5*f);
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asFloat(f*f);
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isFloat(f*f);
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f*=4;
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asFloat(f/2.5);
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isFloat(f/2.5);
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asFloat(2.5/f);
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isFloat(2.5/f);
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asFloat(f/f);
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isFloat(f/f);
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f/=4;
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asFloat(f);
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isFloat(f);
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f = 5;
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asFloat(*&f);
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isFloat(*&f);
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asFloat(234);
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asFloat(Float(234));
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isFloat(Float(234));
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asFloat(1.2);
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asFloat(Float(i));
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isFloat(Float(i));
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asInt(i);
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isInt(i);
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asInt(-i);
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isInt(-i);
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asInt(^i);
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isInt(^i);
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asInt(+i);
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isInt(+i);
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asInt(i+1);
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isInt(i+1);
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asInt(1+i);
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isInt(1+i);
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asInt(i+i);
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isInt(i+i);
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i++;
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i+=1;
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asInt(i-1);
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isInt(i-1);
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asInt(1-i);
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isInt(1-i);
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asInt(i-i);
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isInt(i-i);
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i--;
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i-=1;
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asInt(i*2);
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isInt(i*2);
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asInt(2*i);
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isInt(2*i);
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asInt(i*i);
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isInt(i*i);
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i*=2;
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asInt(i/5);
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isInt(i/5);
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asInt(5/i);
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isInt(5/i);
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asInt(i/i);
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isInt(i/i);
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i/=2;
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asInt(i%5);
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isInt(i%5);
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asInt(5%i);
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isInt(5%i);
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asInt(i%i);
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isInt(i%i);
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i%=2;
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asInt(i&5);
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isInt(i&5);
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asInt(5&i);
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isInt(5&i);
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asInt(i&i);
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isInt(i&i);
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i&=2;
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asInt(i&^5);
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isInt(i&^5);
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asInt(5&^i);
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isInt(5&^i);
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asInt(i&^i);
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isInt(i&^i);
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i&^=2;
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asInt(i|5);
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isInt(i|5);
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asInt(5|i);
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isInt(5|i);
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asInt(i|i);
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isInt(i|i);
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i|=2;
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asInt(i^5);
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isInt(i^5);
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asInt(5^i);
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isInt(5^i);
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asInt(i^i);
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isInt(i^i);
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i^=2;
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asInt(i<<4);
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isInt(i<<4);
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i<<=2;
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asInt(i>>4);
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isInt(i>>4);
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i>>=2;
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asInt(i);
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isInt(i);
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asInt(0);
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asInt(Int(0));
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isInt(Int(0));
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i = 10;
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asInt(*&i);
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isInt(*&i);
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asInt(23);
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asInt(Int(f));
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isInt(Int(f));
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asMap(m);
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isMap(m);
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asMap(nil);
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m = nil;
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asMap(make(Map));
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isMap(make(Map));
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asMap(*&m);
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isMap(*&m);
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asMap(Map(nil));
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isMap(Map(nil));
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asMap(Map{});
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isMap(Map{});
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asSlice(slice);
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isSlice(slice);
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asSlice(make(Slice, 5));
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isSlice(make(Slice, 5));
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asSlice([]byte{1,2,3});
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asSlice([]byte{1,2,3}[0:2]);
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asSlice(slice[0:4]);
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isSlice(slice[0:4]);
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asSlice(slice[3:8]);
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isSlice(slice[3:8]);
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asSlice(nil);
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asSlice(Slice(nil));
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isSlice(Slice(nil));
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slice = nil;
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asSlice(Slice{1,2,3});
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isSlice(Slice{1,2,3});
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asSlice(Slice{});
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isSlice(Slice{});
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asSlice(*&slice);
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isSlice(*&slice);
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asString(str);
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isString(str);
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asString(str+"a");
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isString(str+"a");
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asString("a"+str);
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isString("a"+str);
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asString(str+str);
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isString(str+str);
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str += "a";
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str += str;
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asString(String('a'));
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isString(String('a'));
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asString(String(slice));
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isString(String(slice));
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asString(String([]byte(nil)));
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isString(String([]byte(nil)));
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asString("hello");
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asString(String("hello"));
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isString(String("hello"));
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str = "hello";
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isString(str);
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asString(*&str);
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isString(*&str);
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}
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