node/deps/v8/src/func-name-inferrer.cc

// Copyright 2009 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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#include "v8.h"

#include "ast.h"
#include "func-name-inferrer.h"

namespace v8 {
namespace internal {


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(name->Get(0))) {
    names_stack_.Add(name);
  }
}


void FuncNameInferrer::PushLiteralName(Handle<String> name) {
  if (IsOpen() && !Heap::prototype_symbol()->Equals(*name)) {
    names_stack_.Add(name);
  }
}


void FuncNameInferrer::PushVariableName(Handle<String> name) {
  if (IsOpen() && !Heap::result_symbol()->Equals(*name)) {
    names_stack_.Add(name);
  }
}


Handle<String> FuncNameInferrer::MakeNameFromStack() {
  if (names_stack_.is_empty()) {
    return Factory::empty_string();
  } else {
    return MakeNameFromStackHelper(1, names_stack_.at(0));
  }
}


Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
                                                         Handle<String> prev) {
  if (pos >= names_stack_.length()) {
    return prev;
  } else {
    Handle<String> curr = Factory::NewConsString(dot_, names_stack_.at(pos));
    return MakeNameFromStackHelper(pos + 1, Factory::NewConsString(prev, curr));
  }
}


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