| // 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/ast-value-factory.h" |
| #include "src/func-name-inferrer.h" |
| #include "src/list-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| FuncNameInferrer::FuncNameInferrer(AstValueFactory* ast_value_factory, |
| Zone* zone) |
| : ast_value_factory_(ast_value_factory), |
| entries_stack_(10, zone), |
| names_stack_(5, zone), |
| funcs_to_infer_(4, zone), |
| zone_(zone) { |
| } |
| |
| |
| void FuncNameInferrer::PushEnclosingName(const AstRawString* 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->IsEmpty() && unibrow::Uppercase::Is(name->FirstCharacter())) { |
| names_stack_.Add(Name(name, kEnclosingConstructorName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushLiteralName(const AstRawString* name) { |
| if (IsOpen() && name != ast_value_factory_->prototype_string()) { |
| names_stack_.Add(Name(name, kLiteralName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushVariableName(const AstRawString* name) { |
| if (IsOpen() && name != ast_value_factory_->dot_result_string()) { |
| names_stack_.Add(Name(name, kVariableName), zone()); |
| } |
| } |
| |
| |
| const AstString* FuncNameInferrer::MakeNameFromStack() { |
| return MakeNameFromStackHelper(0, ast_value_factory_->empty_string()); |
| } |
| |
| const AstString* FuncNameInferrer::MakeNameFromStackHelper( |
| int pos, const AstString* 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) { |
| const AstRawString* name = names_stack_.at(pos).name; |
| if (prev->length() + name->length() + 1 > String::kMaxLength) return prev; |
| const AstConsString* curr = ast_value_factory_->NewConsString( |
| ast_value_factory_->dot_string(), name); |
| curr = ast_value_factory_->NewConsString(prev, curr); |
| return MakeNameFromStackHelper(pos + 1, curr); |
| } else { |
| return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name); |
| } |
| } |
| } |
| |
| |
| void FuncNameInferrer::InferFunctionsNames() { |
| const AstString* func_name = MakeNameFromStack(); |
| for (int i = 0; i < funcs_to_infer_.length(); ++i) { |
| funcs_to_infer_[i]->set_raw_inferred_name(func_name); |
| } |
| funcs_to_infer_.Rewind(0); |
| } |
| |
| |
| } } // namespace v8::internal |