go shift3 源码
golang shift3 代码
文件路径：/test/shift3.go
// run
// Copyright 2022 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.
// Test that the compiler's noder uses the correct type
// for RHS shift operands that are untyped. Must compile;
// run for good measure.
package main
import (
"fmt"
"math"
)
func f(x, y int) {
if x != y {
panic(fmt.Sprintf("%d != %d", x, y))
}
}
func main() {
var x int = 1
f(x<<1, 2)
f(x<<1., 2)
f(x<<(1+0i), 2)
f(x<<0i, 1)
f(x<<(1<<x), 4)
f(x<<(1.<<x), 4)
f(x<<((1+0i)<<x), 4)
f(x<<(0i<<x), 1)
// corner cases
const M = math.MaxUint
f(x<<(M+0), 0) // shift by untyped int representable as uint
f(x<<(M+0.), 0) // shift by untyped float representable as uint
f(x<<(M+0.+0i), 0) // shift by untyped complex representable as uint
}
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