golang go1_12 代码
文件路径：/src/go/types/testdata/check/go1_12.go
/ -lang=go1.12
/ Copyright 2021 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.
/ Check Go language version-specific errors.
package p
/ numeric literals
const (
_ = 1_000 / ERROR "underscores in numeric literals requires go1.13 or later"
_ = 0b111 / ERROR "binary literals requires go1.13 or later"
_ = 0o567 / ERROR "0o/0O-style octal literals requires go1.13 or later"
_ = 0xabc / ok
_ = 0x0p1 / ERROR "hexadecimal floating-point literals requires go1.13 or later"
_ = 0B111 / ERROR "binary"
_ = 0O567 / ERROR "octal"
_ = 0Xabc / ok
_ = 0X0P1 / ERROR "hexadecimal floating-point"
_ = 1_000i / ERROR "underscores"
_ = 0b111i / ERROR "binary"
_ = 0o567i / ERROR "octal"
_ = 0xabci / ERROR "hexadecimal floating-point"
_ = 0x0p1i / ERROR "hexadecimal floating-point"
)
/ signed shift counts
var (
s int
_ = 1 << s / ERROR "invalid operation: signed shift count s \(variable of type int\) requires go1.13 or later"
_ = 1 >> s / ERROR "signed shift count"
)