| // +build !js,!wasip1,gc |
| // 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 the impact of line directives on error positions and position formatting. |
| |
| package main |
| |
| import ( |
| "io/ioutil" |
| "log" |
| "os" |
| "os/exec" |
| "strings" |
| ) |
| |
| // Each of these tests is expected to fail (missing package clause) |
| // at the position determined by the preceding line directive. |
| var tests = []struct { |
| src, pos string |
| }{ |
| {"//line :10\n", ":10:"}, // no filename means no filename |
| {"//line :10:4\n", "filename:10:4"}, // no filename means use existing filename |
| {"//line foo.go:10\n", "foo.go:10:"}, // no column means don't print a column |
| {"//line foo.go:10:4\n", "foo.go:10:4:"}, // column means print a column |
| {"//line foo.go:10:4\n\n", "foo.go:11:1:"}, // relative columns start at 1 after newline |
| |
| {"/*line :10*/", ":10:"}, |
| {"/*line :10:4*/", "filename:10:4"}, |
| {"/*line foo.go:10*/", "foo.go:10:"}, |
| {"/*line foo.go:10:4*/", "foo.go:10:4:"}, |
| {"/*line foo.go:10:4*/\n", "foo.go:11:1:"}, |
| } |
| |
| func main() { |
| f, err := ioutil.TempFile("", "issue22662b.go") |
| if err != nil { |
| log.Fatal(err) |
| } |
| f.Close() |
| defer os.Remove(f.Name()) |
| |
| for _, test := range tests { |
| if err := ioutil.WriteFile(f.Name(), []byte(test.src), 0660); err != nil { |
| log.Fatal(err) |
| } |
| |
| out, err := exec.Command("go", "tool", "compile", "-p=p", f.Name()).CombinedOutput() |
| if err == nil { |
| log.Fatalf("expected compiling\n---\n%s\n---\nto fail", test.src) |
| } |
| |
| errmsg := strings.Replace(string(out), f.Name(), "filename", -1) // use "filename" instead of actual (long) filename |
| if !strings.HasPrefix(errmsg, test.pos) { |
| log.Fatalf("%q: got %q; want position %q", test.src, errmsg, test.pos) |
| } |
| } |
| } |