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mirror of https://github.com/golang/go synced 2024-11-22 08:14:40 -07:00
go/test/named.go
Russ Cox 78ebe2b392 test: comparisons have type bool
R=r
DELTA=81  (57 added, 24 deleted, 0 changed)
OCL=34991
CL=34996
2009-09-24 17:54:47 -07:00

282 lines
4.6 KiB
Go

// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test that basic operations on named types are valid
// and preserve the type.
package main
type Array [10]byte
type Bool bool
type Chan chan int
type Float float
type Int int
type Map map[int]byte
type Slice []byte
type String string
// Calling these functions checks at compile time that the argument
// can be converted implicitly to (used as) the given type.
func asArray(Array) {}
func asBool(Bool) {}
func asChan(Chan) {}
func asFloat(Float) {}
func asInt(Int) {}
func asMap(Map) {}
func asSlice(Slice) {}
func asString(String) {}
func (Map) M() {}
// These functions check at run time that the default type
// (in the absence of any implicit conversion hints)
// is the given type.
func isArray(x interface{}) { _ = x.(Array) }
func isBool(x interface{}) { _ = x.(Bool) }
func isChan(x interface{}) { _ = x.(Chan) }
func isFloat(x interface{}) { _ = x.(Float) }
func isInt(x interface{}) { _ = x.(Int) }
func isMap(x interface{}) { _ = x.(Map) }
func isSlice(x interface{}) { _ = x.(Slice) }
func isString(x interface{}) { _ = x.(String) }
func main() {
var (
a Array;
b Bool = true;
c Chan = make(Chan);
f Float = 1;
i Int = 1;
m Map = make(Map);
slice Slice = make(Slice, 10);
str String = "hello";
)
asArray(a);
isArray(a);
asArray(*&a);
isArray(*&a);
asArray(Array{});
isArray(Array{});
asBool(b);
isBool(b);
asBool(!b);
isBool(!b);
asBool(true);
asBool(*&b);
isBool(*&b);
asBool(Bool(true));
isBool(Bool(true));
asChan(c);
isChan(c);
asChan(make(Chan));
isChan(make(Chan));
asChan(*&c);
isChan(*&c);
asChan(Chan(nil));
isChan(Chan(nil));
asFloat(f);
isFloat(f);
asFloat(-f);
isFloat(-f);
asFloat(+f);
isFloat(+f);
asFloat(f+1);
isFloat(f+1);
asFloat(1+f);
isFloat(1+f);
asFloat(f+f);
isFloat(f+f);
f++;
f+=2;
asFloat(f-1);
isFloat(f-1);
asFloat(1-f);
isFloat(1-f);
asFloat(f-f);
isFloat(f-f);
f--;
f-=2;
asFloat(f*2.5);
isFloat(f*2.5);
asFloat(2.5*f);
isFloat(2.5*f);
asFloat(f*f);
isFloat(f*f);
f*=4;
asFloat(f/2.5);
isFloat(f/2.5);
asFloat(2.5/f);
isFloat(2.5/f);
asFloat(f/f);
isFloat(f/f);
f/=4;
asFloat(f);
isFloat(f);
f = 5;
asFloat(*&f);
isFloat(*&f);
asFloat(234);
asFloat(Float(234));
isFloat(Float(234));
asFloat(1.2);
asFloat(Float(i));
isFloat(Float(i));
asInt(i);
isInt(i);
asInt(-i);
isInt(-i);
asInt(^i);
isInt(^i);
asInt(+i);
isInt(+i);
asInt(i+1);
isInt(i+1);
asInt(1+i);
isInt(1+i);
asInt(i+i);
isInt(i+i);
i++;
i+=1;
asInt(i-1);
isInt(i-1);
asInt(1-i);
isInt(1-i);
asInt(i-i);
isInt(i-i);
i--;
i-=1;
asInt(i*2);
isInt(i*2);
asInt(2*i);
isInt(2*i);
asInt(i*i);
isInt(i*i);
i*=2;
asInt(i/5);
isInt(i/5);
asInt(5/i);
isInt(5/i);
asInt(i/i);
isInt(i/i);
i/=2;
asInt(i%5);
isInt(i%5);
asInt(5%i);
isInt(5%i);
asInt(i%i);
isInt(i%i);
i%=2;
asInt(i&5);
isInt(i&5);
asInt(5&i);
isInt(5&i);
asInt(i&i);
isInt(i&i);
i&=2;
asInt(i&^5);
isInt(i&^5);
asInt(5&^i);
isInt(5&^i);
asInt(i&^i);
isInt(i&^i);
i&^=2;
asInt(i|5);
isInt(i|5);
asInt(5|i);
isInt(5|i);
asInt(i|i);
isInt(i|i);
i|=2;
asInt(i^5);
isInt(i^5);
asInt(5^i);
isInt(5^i);
asInt(i^i);
isInt(i^i);
i^=2;
asInt(i<<4);
isInt(i<<4);
i<<=2;
asInt(i>>4);
isInt(i>>4);
i>>=2;
asInt(i);
isInt(i);
asInt(0);
asInt(Int(0));
isInt(Int(0));
i = 10;
asInt(*&i);
isInt(*&i);
asInt(23);
asInt(Int(f));
isInt(Int(f));
asMap(m);
isMap(m);
asMap(nil);
m = nil;
asMap(make(Map));
isMap(make(Map));
asMap(*&m);
isMap(*&m);
asMap(Map(nil));
isMap(Map(nil));
asMap(Map{});
isMap(Map{});
asSlice(slice);
isSlice(slice);
asSlice(make(Slice, 5));
isSlice(make(Slice, 5));
asSlice([]byte{1,2,3});
asSlice([]byte{1,2,3}[0:2]);
asSlice(slice[0:4]);
isSlice(slice[0:4]);
asSlice(slice[3:8]);
isSlice(slice[3:8]);
asSlice(nil);
asSlice(Slice(nil));
isSlice(Slice(nil));
slice = nil;
asSlice(Slice{1,2,3});
isSlice(Slice{1,2,3});
asSlice(Slice{});
isSlice(Slice{});
asSlice(*&slice);
isSlice(*&slice);
asString(str);
isString(str);
asString(str+"a");
isString(str+"a");
asString("a"+str);
isString("a"+str);
asString(str+str);
isString(str+str);
str += "a";
str += str;
asString(String('a'));
isString(String('a'));
asString(String(slice));
isString(String(slice));
asString(String([]byte(nil)));
isString(String([]byte(nil)));
asString("hello");
asString(String("hello"));
isString(String("hello"));
str = "hello";
isString(str);
asString(*&str);
isString(*&str);
}