package go/token
File returns the file that contains the position p(1st parameter). If no such file is found (for instance for p == NoPos), the result is nil.
Golang go/token.FileSet.File function usage examples
Example 1:
func FindFileAst(fset *token.FileSet, file *token.File, fileAsts []*ast.File) *ast.File {
for _, fileAst := range fileAsts {
if fset.File(fileAst.Package) == file {
return fileAst
}
}
return nil
}
Example 2:
for file, pos := range offsets {
f := fset.File(Pos(pos))
if f.Name() != file {
t.Errorf("got %q at position %d, want %q", f.Name(), pos, file)
}
}
References :
http://golang.org/src/pkg/go/token/position_test.go
http://golang.org/pkg/go/token/#FileSet.File
