mirror of
https://github.com/golang/go
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59c8647562
LGTM=josharian, dsymonds, r R=golang-codereviews, josharian, minux, dsymonds, dave, axwalk, adg, r CC=golang-codereviews https://golang.org/cl/134780043
79 lines
3.1 KiB
Go
79 lines
3.1 KiB
Go
// Copyright 2014 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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// This file contains tests for the suspicious shift checker.
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package testdata
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func ShiftTest() {
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var i8 int8
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_ = i8 << 7
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_ = (i8 + 1) << 8 // ERROR "\(i8 \+ 1\) too small for shift of 8"
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_ = i8 << (7 + 1) // ERROR "i8 too small for shift of 8"
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_ = i8 >> 8 // ERROR "i8 too small for shift of 8"
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i8 <<= 8 // ERROR "i8 too small for shift of 8"
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i8 >>= 8 // ERROR "i8 too small for shift of 8"
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var i16 int16
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_ = i16 << 15
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_ = i16 << 16 // ERROR "i16 too small for shift of 16"
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_ = i16 >> 16 // ERROR "i16 too small for shift of 16"
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i16 <<= 16 // ERROR "i16 too small for shift of 16"
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i16 >>= 16 // ERROR "i16 too small for shift of 16"
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var i32 int32
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_ = i32 << 31
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_ = i32 << 32 // ERROR "i32 too small for shift of 32"
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_ = i32 >> 32 // ERROR "i32 too small for shift of 32"
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i32 <<= 32 // ERROR "i32 too small for shift of 32"
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i32 >>= 32 // ERROR "i32 too small for shift of 32"
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var i64 int64
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_ = i64 << 63
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_ = i64 << 64 // ERROR "i64 too small for shift of 64"
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_ = i64 >> 64 // ERROR "i64 too small for shift of 64"
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i64 <<= 64 // ERROR "i64 too small for shift of 64"
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i64 >>= 64 // ERROR "i64 too small for shift of 64"
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var u8 uint8
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_ = u8 << 7
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_ = u8 << 8 // ERROR "u8 too small for shift of 8"
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_ = u8 >> 8 // ERROR "u8 too small for shift of 8"
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u8 <<= 8 // ERROR "u8 too small for shift of 8"
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u8 >>= 8 // ERROR "u8 too small for shift of 8"
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var u16 uint16
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_ = u16 << 15
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_ = u16 << 16 // ERROR "u16 too small for shift of 16"
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_ = u16 >> 16 // ERROR "u16 too small for shift of 16"
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u16 <<= 16 // ERROR "u16 too small for shift of 16"
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u16 >>= 16 // ERROR "u16 too small for shift of 16"
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var u32 uint32
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_ = u32 << 31
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_ = u32 << 32 // ERROR "u32 too small for shift of 32"
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_ = u32 >> 32 // ERROR "u32 too small for shift of 32"
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u32 <<= 32 // ERROR "u32 too small for shift of 32"
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u32 >>= 32 // ERROR "u32 too small for shift of 32"
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var u64 uint64
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_ = u64 << 63
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_ = u64 << 64 // ERROR "u64 too small for shift of 64"
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_ = u64 >> 64 // ERROR "u64 too small for shift of 64"
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u64 <<= 64 // ERROR "u64 too small for shift of 64"
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u64 >>= 64 // ERROR "u64 too small for shift of 64"
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_ = u64 << u64 // Non-constant shifts should succeed.
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var i int
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_ = i << 31
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_ = i << 32 // ERROR "i might be too small for shift of 32"
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_ = i >> 32 // ERROR "i might be too small for shift of 32"
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i <<= 32 // ERROR "i might be too small for shift of 32"
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i >>= 32 // ERROR "i might be too small for shift of 32"
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var u uint
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_ = u << 31
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_ = u << 32 // ERROR "u might be too small for shift of 32"
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_ = u >> 32 // ERROR "u might be too small for shift of 32"
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u <<= 32 // ERROR "u might be too small for shift of 32"
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u >>= 32 // ERROR "u might be too small for shift of 32"
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var p uintptr
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_ = p << 31
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_ = p << 32 // ERROR "p might be too small for shift of 32"
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_ = p >> 32 // ERROR "p might be too small for shift of 32"
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p <<= 32 // ERROR "p might be too small for shift of 32"
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p >>= 32 // ERROR "p might be too small for shift of 32"
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}
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