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https://github.com/golang/go
synced 2024-11-14 05:50:27 -07:00
72ad2f44ea
Added a new flag -G to run. Setting -G (as in: go run run.go -G) will run tests marked with "errorcheck" (and no other flags) also with the compiler using the new typechecker. Many tests don't pass yet (due to discrepancies in error messages). The top-level tests in the test directory which don't pass yet have been explicitly excluded, permitting to see the current status. Future CLs will bring error messages in sync and eventually all tests should pass. Change-Id: I7caf5eff413e173f68d092af4bbe458434718d74 Reviewed-on: https://go-review.googlesource.com/c/go/+/274313 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
95 lines
3.8 KiB
Go
95 lines
3.8 KiB
Go
// errorcheck
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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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// Verify overflow is detected when using numeric constants.
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// Does not compile.
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package main
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import "unsafe"
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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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Float64 float64 = 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 "overflow|cannot convert"
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a2 = Int8 * -1 // OK
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a3 = Int8 * 1000 // ERROR "overflow|cannot convert"
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a4 = Int8 * int8(1000) // ERROR "overflow|cannot convert"
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a5 = int8(Int8 * 1000) // ERROR "overflow|cannot convert"
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a6 = int8(Int8 * int8(1000)) // ERROR "overflow|cannot convert"
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a7 = Int8 - 2*Int8 - 2*Int8 // ERROR "overflow|cannot convert"
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a8 = Int8 * Const / 100 // ERROR "overflow|cannot convert"
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a9 = Int8 * (Const / 100) // OK
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b1 = Uint8 * Uint8 // ERROR "overflow|cannot convert"
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b2 = Uint8 * -1 // ERROR "overflow|cannot convert"
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b3 = Uint8 - Uint8 // OK
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b4 = Uint8 - Uint8 - Uint8 // ERROR "overflow|cannot convert"
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b5 = uint8(^0) // ERROR "overflow|cannot convert"
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b5a = int64(^0) // OK
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b6 = ^uint8(0) // OK
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b6a = ^int64(0) // OK
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b7 = uint8(Minus1) // ERROR "overflow|cannot convert"
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b8 = uint8(int8(-1)) // ERROR "overflow|cannot convert"
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b8a = uint8(-1) // ERROR "overflow|cannot convert"
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b9 byte = (1 << 10) >> 8 // OK
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b10 byte = (1 << 10) // ERROR "overflow|cannot convert"
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b11 byte = (byte(1) << 10) >> 8 // ERROR "overflow|cannot convert"
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b12 byte = 1000 // ERROR "overflow|cannot convert"
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b13 byte = byte(1000) // ERROR "overflow|cannot convert"
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b14 byte = byte(100) * byte(100) // ERROR "overflow|cannot convert"
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b15 byte = byte(100) * 100 // ERROR "overflow|cannot convert"
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b16 byte = byte(0) * 1000 // ERROR "overflow|cannot convert"
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b16a byte = 0 * 1000 // OK
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b17 byte = byte(0) * byte(1000) // ERROR "overflow|cannot convert"
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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 "overflow|cannot convert"
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c3 float64 = float64(Big) * Big // ERROR "overflow|cannot convert"
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c4 = Big * Big // ERROR "overflow|cannot convert"
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c5 = Big / 0 // ERROR "division by zero"
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c6 = 1000 % 1e3 // ERROR "invalid operation|expected integer type"
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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|wrong type|cannot"
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f(Minus1) // ERROR "convert|wrong type|cannot"
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f(Uint8) // ERROR "convert|wrong type|cannot"
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f(Const) // OK
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f(Float32) // ERROR "convert|wrong type|cannot"
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f(Float64) // ERROR "convert|wrong type|cannot"
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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|wrong type|cannot"
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f(String) // ERROR "convert|wrong type|cannot|incompatible"
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f(Bool) // ERROR "convert|wrong type|cannot|incompatible"
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}
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const ptr = nil // ERROR "const.*nil|not constant"
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const _ = string([]byte(nil)) // ERROR "is not a? ?constant"
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const _ = uintptr(unsafe.Pointer((*int)(nil))) // ERROR "is not a? ?constant"
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const _ = unsafe.Pointer((*int)(nil)) // ERROR "cannot be nil|invalid constant type|is not a constant|not constant"
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const _ = (*int)(nil) // ERROR "cannot be nil|invalid constant type|is not a constant|not constant"
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