Merge 'wip/next' into dev

Change-Id: Iff9ee5e23bb326c4371ec8ed81d56f2f05d680e9

1 files changed, 125 insertions, 14 deletions

diff --git a/Source/JavaScriptCore/parser/ParserModes.h b/Source/JavaScriptCore/parser/ParserModes.h
index a7383a3e1..4f6bac6c3 100644
--- a/Source/JavaScriptCore/parser/ParserModes.h
+++ b/Source/JavaScriptCore/parser/ParserModes.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2012, 2013, 2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -27,28 +27,139 @@
 #ifndef ParserModes_h
 #define ParserModes_h
 
+#include "Identifier.h"
+
 namespace JSC {
 
-enum JSParserStrictness { JSParseNormal, JSParseStrict };
-enum JSParserMode { JSParseProgramCode, JSParseFunctionCode };
+enum class JSParserStrictMode { NotStrict, Strict };
+enum class JSParserBuiltinMode { NotBuiltin, Builtin };
+enum class JSParserCodeType { Program, Function, Module };
+
+enum class ConstructorKind { None, Base, Derived };
+enum class SuperBinding { Needed, NotNeeded };
+enum class ThisTDZMode { AlwaysCheck, CheckIfNeeded };
 
 enum ProfilerMode { ProfilerOff, ProfilerOn };
 enum DebuggerMode { DebuggerOff, DebuggerOn };
 
-enum FunctionNameIsInScopeToggle { FunctionNameIsNotInScope, FunctionNameIsInScope };
+enum FunctionMode { FunctionExpression, FunctionDeclaration };
+
+enum class SourceParseMode : uint8_t {
+    NormalFunctionMode,
+    GeneratorBodyMode,
+    GeneratorWrapperFunctionMode,
+    GetterMode,
+    SetterMode,
+    MethodMode,
+    ArrowFunctionMode,
+    ProgramMode,
+    ModuleAnalyzeMode,
+    ModuleEvaluateMode
+};
+
+inline bool isFunctionParseMode(SourceParseMode parseMode)
+{
+    switch (parseMode) {
+    case SourceParseMode::NormalFunctionMode:
+    case SourceParseMode::GeneratorBodyMode:
+    case SourceParseMode::GeneratorWrapperFunctionMode:
+    case SourceParseMode::GetterMode:
+    case SourceParseMode::SetterMode:
+    case SourceParseMode::MethodMode:
+    case SourceParseMode::ArrowFunctionMode:
+        return true;
+
+    case SourceParseMode::ProgramMode:
+    case SourceParseMode::ModuleAnalyzeMode:
+    case SourceParseMode::ModuleEvaluateMode:
+        return false;
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return false;
+}
+
+inline bool isModuleParseMode(SourceParseMode parseMode)
+{
+    switch (parseMode) {
+    case SourceParseMode::ModuleAnalyzeMode:
+    case SourceParseMode::ModuleEvaluateMode:
+        return true;
+
+    case SourceParseMode::NormalFunctionMode:
+    case SourceParseMode::GeneratorBodyMode:
+    case SourceParseMode::GeneratorWrapperFunctionMode:
+    case SourceParseMode::GetterMode:
+    case SourceParseMode::SetterMode:
+    case SourceParseMode::MethodMode:
+    case SourceParseMode::ArrowFunctionMode:
+    case SourceParseMode::ProgramMode:
+        return false;
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return false;
+}
+
+inline bool isProgramParseMode(SourceParseMode parseMode)
+{
+    switch (parseMode) {
+    case SourceParseMode::ProgramMode:
+        return true;
+
+    case SourceParseMode::NormalFunctionMode:
+    case SourceParseMode::GeneratorBodyMode:
+    case SourceParseMode::GeneratorWrapperFunctionMode:
+    case SourceParseMode::GetterMode:
+    case SourceParseMode::SetterMode:
+    case SourceParseMode::MethodMode:
+    case SourceParseMode::ArrowFunctionMode:
+    case SourceParseMode::ModuleAnalyzeMode:
+    case SourceParseMode::ModuleEvaluateMode:
+        return false;
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return false;
+}
+
+inline bool functionNameIsInScope(const Identifier& name, FunctionMode functionMode)
+{
+    if (name.isNull())
+        return false;
+
+    if (functionMode != FunctionExpression)
+        return false;
+
+    return true;
+}
+
+inline bool functionNameScopeIsDynamic(bool usesEval, bool isStrictMode)
+{
+    // If non-strict eval is in play, a function gets a separate object in the scope chain for its name.
+    // This enables eval to declare and then delete a name that shadows the function's name.
+
+    if (!usesEval)
+        return false;
+
+    if (isStrictMode)
+        return false;
+
+    return true;
+}
 
-typedef unsigned CodeFeatures;
+typedef uint16_t CodeFeatures;
 
-const CodeFeatures NoFeatures = 0;
-const CodeFeatures EvalFeature = 1 << 0;
-const CodeFeatures ArgumentsFeature = 1 << 1;
-const CodeFeatures WithFeature = 1 << 2;
-const CodeFeatures CatchFeature = 1 << 3;
-const CodeFeatures ThisFeature = 1 << 4;
-const CodeFeatures StrictModeFeature = 1 << 5;
-const CodeFeatures ShadowsArgumentsFeature = 1 << 6;
+const CodeFeatures NoFeatures =                       0;
+const CodeFeatures EvalFeature =                 1 << 0;
+const CodeFeatures ArgumentsFeature =            1 << 1;
+const CodeFeatures WithFeature =                 1 << 2;
+const CodeFeatures ThisFeature =                 1 << 3;
+const CodeFeatures StrictModeFeature =           1 << 4;
+const CodeFeatures ShadowsArgumentsFeature =     1 << 5;
+const CodeFeatures ModifiedParameterFeature =    1 << 6;
+const CodeFeatures ModifiedArgumentsFeature =    1 << 7;
+const CodeFeatures ArrowFunctionFeature =        1 << 8;
+const CodeFeatures ArrowFunctionContextFeature = 1 << 9;
 
-const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | CatchFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature;
+const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ModifiedParameterFeature | ArrowFunctionFeature | ArrowFunctionContextFeature;
 
 } // namespace JSC