| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/v8.h" |
| |
| #include "src/ast.h" |
| #include "src/func-name-inferrer.h" |
| #include "src/list-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone) |
| : isolate_(isolate), |
| entries_stack_(10, zone), |
| names_stack_(5, zone), |
| funcs_to_infer_(4, zone), |
| zone_(zone) { |
| } |
| |
| |
| void FuncNameInferrer::PushEnclosingName(Handle<String> name) { |
| // Enclosing name is a name of a constructor function. To check |
| // that it is really a constructor, we check that it is not empty |
| // and starts with a capital letter. |
| if (name->length() > 0 && Runtime::IsUpperCaseChar( |
| isolate()->runtime_state(), name->Get(0))) { |
| names_stack_.Add(Name(name, kEnclosingConstructorName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushLiteralName(Handle<String> name) { |
| if (IsOpen() && |
| !String::Equals(isolate()->factory()->prototype_string(), name)) { |
| names_stack_.Add(Name(name, kLiteralName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushVariableName(Handle<String> name) { |
| if (IsOpen() && |
| !String::Equals(isolate()->factory()->dot_result_string(), name)) { |
| names_stack_.Add(Name(name, kVariableName), zone()); |
| } |
| } |
| |
| |
| Handle<String> FuncNameInferrer::MakeNameFromStack() { |
| return MakeNameFromStackHelper(0, isolate()->factory()->empty_string()); |
| } |
| |
| |
| Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos, |
| Handle<String> prev) { |
| if (pos >= names_stack_.length()) return prev; |
| if (pos < names_stack_.length() - 1 && |
| names_stack_.at(pos).type == kVariableName && |
| names_stack_.at(pos + 1).type == kVariableName) { |
| // Skip consecutive variable declarations. |
| return MakeNameFromStackHelper(pos + 1, prev); |
| } else { |
| if (prev->length() > 0) { |
| Handle<String> name = names_stack_.at(pos).name; |
| if (prev->length() + name->length() + 1 > String::kMaxLength) return prev; |
| Factory* factory = isolate()->factory(); |
| Handle<String> curr = |
| factory->NewConsString(factory->dot_string(), name).ToHandleChecked(); |
| curr = factory->NewConsString(prev, curr).ToHandleChecked(); |
| return MakeNameFromStackHelper(pos + 1, curr); |
| } else { |
| return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name); |
| } |
| } |
| } |
| |
| |
| void FuncNameInferrer::InferFunctionsNames() { |
| Handle<String> func_name = MakeNameFromStack(); |
| for (int i = 0; i < funcs_to_infer_.length(); ++i) { |
| funcs_to_infer_[i]->set_inferred_name(func_name); |
| } |
| funcs_to_infer_.Rewind(0); |
| } |
| |
| |
| } } // namespace v8::internal |