| // 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 conversion of constants is work in progress. |
| // the ERRORs in this block are debatable, but they're what |
| // the language spec says for now. |
| var x1 = string(1); |
| var x2 string = string(1); |
| var x3 = int(1.5); // ERROR "convert|truncate" |
| var x4 int = int(1.5); // ERROR "convert|truncate" |
| var x5 = "a" + string(1); |
| var x6 = int(1e100); // ERROR "overflow" |
| var x7 = float(1e1000); // ERROR "overflow" |
| |
| // implicit conversions merit scrutiny |
| var s string; |
| var bad1 string = 1; // ERROR "conver|incompatible|invalid|cannot" |
| var bad2 = s + 1; // ERROR "conver|incompatible|invalid" |
| var bad3 = s + 'a'; // ERROR "conver|incompatible|invalid" |
| var bad4 = "a" + 1; // ERROR "literals|incompatible|convert|invalid" |
| var bad5 = "a" + 'a'; // ERROR "literals|incompatible|convert|invalid" |
| |
| var bad6 int = 1.5; // ERROR "convert|truncate" |
| var bad7 int = 1e100; // ERROR "overflow" |
| var bad8 float32 = 1e200; // 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; |
| |
| // explicit conversion of string is okay |
| var _ = []int("abc") |
| var _ = []byte("abc") |
| |
| // implicit is not |
| var _ []int = "abc" // ERROR "cannot use|incompatible|invalid" |
| var _ []byte = "abc" // ERROR "cannot use|incompatible|invalid" |
| |
| // named string is okay |
| type Tstring string |
| var ss Tstring = "abc" |
| var _ = []int(ss) |
| var _ = []byte(ss) |
| |
| // implicit is still not |
| var _ []int = ss // ERROR "cannot use|incompatible|invalid" |
| var _ []byte = ss // ERROR "cannot use|incompatible|invalid" |
| |
| // named slice is not |
| type Tint []int |
| type Tbyte []byte |
| var _ = Tint("abc") // ERROR "convert|incompatible|invalid" |
| var _ = Tbyte("abc") // ERROR "convert|incompatible|invalid" |
| |
| // implicit is still not |
| var _ Tint = "abc" // ERROR "cannot use|incompatible|invalid" |
| var _ Tbyte = "abc" // ERROR "cannot use|incompatible|invalid" |