1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
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31 #include "func-name-inferrer.h"
37 FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone)
39 entries_stack_(10, zone),
40 names_stack_(5, zone),
41 funcs_to_infer_(4, zone),
46 void FuncNameInferrer::PushEnclosingName(Handle<String> name) {
47 // Enclosing name is a name of a constructor function. To check
48 // that it is really a constructor, we check that it is not empty
49 // and starts with a capital letter.
50 if (name->length() > 0 && Runtime::IsUpperCaseChar(
51 isolate()->runtime_state(), name->Get(0))) {
52 names_stack_.Add(Name(name, kEnclosingConstructorName), zone());
57 void FuncNameInferrer::PushLiteralName(Handle<String> name) {
58 if (IsOpen() && !isolate()->heap()->prototype_string()->Equals(*name)) {
59 names_stack_.Add(Name(name, kLiteralName), zone());
64 void FuncNameInferrer::PushVariableName(Handle<String> name) {
65 if (IsOpen() && !isolate()->heap()->dot_result_string()->Equals(*name)) {
66 names_stack_.Add(Name(name, kVariableName), zone());
71 Handle<String> FuncNameInferrer::MakeNameFromStack() {
72 return MakeNameFromStackHelper(0, isolate()->factory()->empty_string());
76 Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
77 Handle<String> prev) {
78 if (pos >= names_stack_.length()) return prev;
79 if (pos < names_stack_.length() - 1 &&
80 names_stack_.at(pos).type == kVariableName &&
81 names_stack_.at(pos + 1).type == kVariableName) {
82 // Skip consecutive variable declarations.
83 return MakeNameFromStackHelper(pos + 1, prev);
85 if (prev->length() > 0) {
86 Factory* factory = isolate()->factory();
87 Handle<String> curr = factory->NewConsString(
88 factory->dot_string(), names_stack_.at(pos).name);
89 return MakeNameFromStackHelper(pos + 1,
90 factory->NewConsString(prev, curr));
92 return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name);
98 void FuncNameInferrer::InferFunctionsNames() {
99 Handle<String> func_name = MakeNameFromStack();
100 for (int i = 0; i < funcs_to_infer_.length(); ++i) {
101 funcs_to_infer_[i]->set_inferred_name(func_name);
103 funcs_to_infer_.Rewind(0);
107 } } // namespace v8::internal