go issue22662 源码
golang issue22662 代码
文件路径：/test/fixedbugs/issue22662.go
// run
// Copyright 2018 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.
// Verify effect of various line directives.
// TODO: check columns
package main
import (
"fmt"
"runtime"
)
func check(file string, line int) {
_, f, l, ok := runtime.Caller(1)
if !ok {
panic("runtime.Caller(1) failed")
}
if f != file || l != line {
panic(fmt.Sprintf("got %s:%d; want %s:%d", f, l, file, line))
}
}
func main() {
//-style line directives
//line :1
check("??", 1) // no file specified
//line foo.go:1
check("foo.go", 1)
//line bar.go:10:20
check("bar.go", 10)
//line :11:22
check("bar.go", 11) // no file, but column specified => keep old filename
/*-style line directives */
/*line :1*/ check("??", 1) // no file specified
/*line foo.go:1*/ check("foo.go", 1)
/*line bar.go:10:20*/ check("bar.go", 10)
/*line :11:22*/ check("bar.go", 11) // no file, but column specified => keep old filename
/*line :10*/ check("??", 10); /*line foo.go:20*/ check("foo.go", 20); /*line :30:1*/ check("foo.go", 30)
check("foo.go", 31)
}
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