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go/test/convlit.go
Russ Cox 1163b1db6f diagnose various conversion problems
R=ken
OCL=17320
CL=17320
2008-10-16 15:59:31 -07:00

36 lines
928 B
Go

// errchk $G -e $D/$F.go
// 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.
package main
// explicit conversions are okay, even if they overflow
var x1 = string(1);
var x2 string = string(1);
var x3 = int(1.5);
var x4 int = int(1.5);
var x5 = "a" + string(1);
var x6 = int(1e100);
var x7 = float(1e1000);
// implicit conversions merit scrutiny
var s string;
var bad1 string = 1; // ERROR "conver"
var bad2 = s + 1; // ERROR "conver"
var bad3 = s + 'a'; // ERROR "conver"
var bad4 = "a" + 1; // ERROR "literals"
var bad5 = "a" + 'a'; // ERROR "literals"
var bad6 int = 1.5; // ERROR "convert"
var bad7 int = 1e100; // ERROR "overflow"
var bad8 float = 1e1000; // ERROR "overflow"
// but these implicit conversions are okay
var good1 string = "a";
var good2 int = 1.0;
var good3 int = 1e9;
var good4 float = 1e20;