for _, d := range f.Use {
		if d.Path == path {
			d.Syntax.markRemoved()
			*d = Use{}
		}
	}
	return nil
}

func (f *WorkFile) AddReplace(oldPath, oldVers, newPath, newVers string) error {
	return addReplace(f.Syntax, &f.Replace, oldPath, oldVers, newPath, newVers)
}

func (f *WorkFile) DropReplace(oldPath, oldVers string) error {
	for _, r := range f.Replace {

	if newPath == new && !modfile.IsDirectoryPath(new) {
		base.Fatalf("go: -replace=%s: unversioned new path must be local directory", arg)
	}

	workedits = append(workedits, func(f *modfile.WorkFile) {
		if err := f.AddReplace(oldPath, oldVersion, newPath, newVersion); err != nil {
			base.Fatalf("go: -replace=%s: %v", arg, err)
		}
	})
}

// flagEditworkDropReplace implements the -dropreplace flag.

			x.Syntax.markRemoved()
			*x = Exclude{}
		}
	}
	return nil
}

func (f *File) AddReplace(oldPath, oldVers, newPath, newVers string) error {
	return addReplace(f.Syntax, &f.Replace, oldPath, oldVers, newPath, newVers)
}

func addReplace(syntax *FileSyntax, replace *[]*Replace, oldPath, oldVers, newPath, newVers string) error {
	need := true

	}
	if newPath == new && !modfile.IsDirectoryPath(new) {
		base.Fatalf("go: -replace=%s: unversioned new path must be local directory", arg)
	}

	edits = append(edits, func(f *modfile.File) {
		if err := f.AddReplace(oldPath, oldVersion, newPath, newVersion); err != nil {
			base.Fatalf("go: -replace=%s: %v", arg, err)
		}
	})
}

// flagDropReplace implements the -dropreplace flag.
func flagDropReplace(arg string) {