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https://github.com/golang/go
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8f194bf5ff
various bug fixes and tests involving constants. test/const1.go is the major new test case. R=ken OCL=26216 CL=26224
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// errchk $G -e $F.go
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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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package main
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type I interface {}
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const (
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// assume all types behave similarly to int8/uint8
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Int8 int8 = 101;
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Minus1 int8 = -1;
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Uint8 uint8 = 102;
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Const = 103;
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Float32 float32 = 104.5;
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Float float = 105.5;
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ConstFloat = 106.5;
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Big float64 = 1e300;
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String = "abc";
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Bool = true;
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)
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var (
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a1 = Int8 * 100; // ERROR "overflows"
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a2 = Int8 * -1; // OK
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a3 = Int8 * 1000; // ERROR "overflows"
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a4 = Int8 * int8(1000); // ERROR "overflows"
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a5 = int8(Int8 * 1000); // ERROR "overflows"
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a6 = int8(Int8 * int8(1000)); // ERROR "overflows"
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a7 = Int8 - 2*Int8 - 2*Int8; // ERROR "overflows"
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a8 = Int8 * Const / 100; // ERROR "overflows"
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a9 = Int8 * (Const / 100); // OK
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b1 = Uint8 * Uint8; // ERROR "overflows"
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b2 = Uint8 * -1; // ERROR "overflows"
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b3 = Uint8 - Uint8; // OK
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b4 = Uint8 - Uint8 - Uint8; // ERROR "overflows"
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b5 = uint8(^0); // ERROR "overflows"
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b6 = ^uint8(0); // ERROR "overflows"
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b7 = uint8(Minus1); // ERROR "overflows"
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b8 = uint8(int8(-1)); // ERROR "overflows"
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b8a = uint8(-1); // ERROR "overflows"
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b9 byte = (1<<10) >> 8; // OK
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b10 byte = (1<<10); // ERROR "overflows"
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b11 byte = (byte(1)<<10) >> 8; // ERROR "overflows"
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b12 byte = 1000; // ERROR "overflows"
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b13 byte = byte(1000); // ERROR "overflows"
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b14 byte = byte(100) * byte(100); // ERROR "overflows"
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b15 byte = byte(100) * 100; // ERROR "overflows"
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b16 byte = byte(0) * 1000; // ERROR "overflows"
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b16a byte = 0 * 1000; // OK
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b17 byte = byte(0) * byte(1000); // ERROR "overflows"
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b18 byte = Uint8/0; // ERROR "division by zero"
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c1 float64 = Big;
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c2 float64 = Big*Big; // ERROR "overflows"
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c3 float64 = float64(Big)*Big; // ERROR "overflows"
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c4 = Big*Big; // ERROR "overflows"
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c5 = Big/0; // ERROR "division by zero"
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)
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func f(int);
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func main() {
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f(Int8); // ERROR "convert"
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f(Minus1); // ERROR "convert"
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f(Uint8); // ERROR "convert"
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f(Const); // OK
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f(Float32); // ERROR "convert"
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f(Float); // ERROR "convert"
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f(ConstFloat); // ERROR "truncate"
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f(ConstFloat - 0.5); // OK
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f(Big); // ERROR "convert"
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f(String); // ERROR "convert"
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f(Bool); // ERROR "convert"
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}
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