| // 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" |
| "strings" |
| ) |
| |
| // Since go.dev/issue/70478, the compiler resolves a relative filename in a |
| // line directive against the directory of the source file, so the expected |
| // path may be a suffix of the actual filename rather than equal to it. |
| // Accept either an exact match or the file as a path-component suffix. |
| // Compiler-emitted paths are always slash-normalized (cmd/internal/objabi.AbsFile). |
| func check(file string, line int) { |
| _, f, l, ok := runtime.Caller(1) |
| if !ok { |
| panic("runtime.Caller(1) failed") |
| } |
| // Prepend exactly one "/" even if file already starts with one, so that |
| // e.g. file="/foo/bar.go" looks for "/foo/bar.go" as the suffix, not "//". |
| want := "/" + strings.TrimPrefix(file, "/") |
| if (f != file && !strings.HasSuffix(f, want)) || l != line { |
| panic(fmt.Sprintf("got %s:%d; want %s:%d (or suffix %s)", f, l, file, line, want)) |
| } |
| } |
| |
| 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) |
| } |
