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https://github.com/golang/go
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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>
33 lines
1008 B
Go
33 lines
1008 B
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 that large integer constant expressions cause overflow.
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// Does not compile.
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package main
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const (
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A int = 1
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B byte; // ERROR "type without expr|expected .=.|missing init expr"
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)
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const LargeA = 1000000000000000000
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const LargeB = LargeA * LargeA * LargeA
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const LargeC = LargeB * LargeB * LargeB // GC_ERROR "constant multiplication overflow"
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const AlsoLargeA = LargeA << 400 << 400 >> 400 >> 400 // GC_ERROR "constant shift overflow"
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// Issue #42732.
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const a = 1e+500000000
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const b = a * a // ERROR "constant multiplication overflow|not representable"
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const c = b * b
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const MaxInt512 = (1<<256 - 1) * (1<<256 + 1)
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const _ = MaxInt512 + 1 // ERROR "constant addition overflow"
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const _ = MaxInt512 ^ -1 // ERROR "constant bitwise XOR overflow"
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const _ = ^MaxInt512 // ERROR "constant bitwise complement overflow"
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