func renameSymbol(sym st.Symbol, newName string, programTree *program.Program) (fnames []string, fsets []*token.FileSet, files []*ast.File, err *errors.GoRefactorError) {
filesMap := make(map[string]bool)
for _, pos := range sym.Positions() {
filesMap[pos.Filename] = true
}
l, i := len(filesMap), 0
fnames, fsets, files = make([]string, l), make([]*token.FileSet, l), make([]*ast.File, l)
for f, _ := range filesMap {
fnames[i] = f
i++
}
for i, f := range fnames {
pack, file := programTree.FindPackageAndFileByFilename(f)
positions := []token.Position{}
for _, pos := range sym.Positions() {
if pos.Filename == f {
positions = append(positions, pos)
}
}
if _, fsets[i], files[i], err = printerUtil.RenameIdents(pack.FileSet, programTree.IdentMap, f, file, positions, newName); err != nil {
return nil, nil, nil, err
}
}
for ident, _ := range sym.Identifiers() {
ident.Name = newName
}
return fnames, fsets, files, nil
}
