1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
8 #include "func-name-inferrer.h"
14 FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone)
16 entries_stack_(10, zone),
17 names_stack_(5, zone),
18 funcs_to_infer_(4, zone),
23 void FuncNameInferrer::PushEnclosingName(Handle<String> name) {
24 // Enclosing name is a name of a constructor function. To check
25 // that it is really a constructor, we check that it is not empty
26 // and starts with a capital letter.
27 if (name->length() > 0 && Runtime::IsUpperCaseChar(
28 isolate()->runtime_state(), name->Get(0))) {
29 names_stack_.Add(Name(name, kEnclosingConstructorName), zone());
34 void FuncNameInferrer::PushLiteralName(Handle<String> name) {
36 !String::Equals(isolate()->factory()->prototype_string(), name)) {
37 names_stack_.Add(Name(name, kLiteralName), zone());
42 void FuncNameInferrer::PushVariableName(Handle<String> name) {
44 !String::Equals(isolate()->factory()->dot_result_string(), name)) {
45 names_stack_.Add(Name(name, kVariableName), zone());
50 Handle<String> FuncNameInferrer::MakeNameFromStack() {
51 return MakeNameFromStackHelper(0, isolate()->factory()->empty_string());
55 Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
56 Handle<String> prev) {
57 if (pos >= names_stack_.length()) return prev;
58 if (pos < names_stack_.length() - 1 &&
59 names_stack_.at(pos).type == kVariableName &&
60 names_stack_.at(pos + 1).type == kVariableName) {
61 // Skip consecutive variable declarations.
62 return MakeNameFromStackHelper(pos + 1, prev);
64 if (prev->length() > 0) {
65 Handle<String> name = names_stack_.at(pos).name;
66 if (prev->length() + name->length() + 1 > String::kMaxLength) return prev;
67 Factory* factory = isolate()->factory();
69 factory->NewConsString(factory->dot_string(), name).ToHandleChecked();
70 curr = factory->NewConsString(prev, curr).ToHandleChecked();
71 return MakeNameFromStackHelper(pos + 1, curr);
73 return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name);
79 void FuncNameInferrer::InferFunctionsNames() {
80 Handle<String> func_name = MakeNameFromStack();
81 for (int i = 0; i < funcs_to_infer_.length(); ++i) {
82 funcs_to_infer_[i]->set_inferred_name(func_name);
84 funcs_to_infer_.Rewind(0);
88 } } // namespace v8::internal