}
	})
}

// flagExclude implements the -exclude flag.
func flagExclude(arg string) {
	path, version := parsePathVersion("exclude", arg)
	edits = append(edits, func(f *modfile.File) {
		if err := f.AddExclude(path, version); err != nil {
			base.Fatalf("go: -exclude=%s: %v", arg, err)
		}
	})
}

// flagDropExclude implements the -dropexclude flag.
func flagDropExclude(arg string) {

		if r.Mod.Path == path {
			r.Syntax.markRemoved()
			*r = Require{}
		}
	}
	return nil
}

// AddExclude adds a exclude statement to the mod file. Errors if the provided
// version is not a canonical version string
func (f *File) AddExclude(path, vers string) error {
	if err := checkCanonicalVersion(path, vers); err != nil {
		return err
	}

	var hint *Line