726f3801a4
R=marja@chromium.org BUG= Review URL: https://codereview.chromium.org/935413003 Cr-Commit-Position: refs/heads/master@{#26765}
959 lines
35 KiB
C++
959 lines
35 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_PARSER_H_
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#define V8_PARSER_H_
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#include "src/allocation.h"
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#include "src/ast.h"
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#include "src/compiler.h" // For CachedDataMode
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#include "src/preparse-data.h"
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#include "src/preparse-data-format.h"
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#include "src/preparser.h"
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#include "src/scopes.h"
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namespace v8 {
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class ScriptCompiler;
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namespace internal {
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class CompilationInfo;
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class ParserLog;
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class PositionStack;
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class Target;
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class FunctionEntry BASE_EMBEDDED {
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public:
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enum {
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kStartPositionIndex,
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kEndPositionIndex,
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kLiteralCountIndex,
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kPropertyCountIndex,
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kLanguageModeIndex,
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kUsesSuperPropertyIndex,
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kSize
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};
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explicit FunctionEntry(Vector<unsigned> backing)
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: backing_(backing) { }
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FunctionEntry() : backing_() { }
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int start_pos() { return backing_[kStartPositionIndex]; }
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int end_pos() { return backing_[kEndPositionIndex]; }
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int literal_count() { return backing_[kLiteralCountIndex]; }
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int property_count() { return backing_[kPropertyCountIndex]; }
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LanguageMode language_mode() {
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DCHECK(is_valid_language_mode(backing_[kLanguageModeIndex]));
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return static_cast<LanguageMode>(backing_[kLanguageModeIndex]);
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}
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bool uses_super_property() { return backing_[kUsesSuperPropertyIndex]; }
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bool is_valid() { return !backing_.is_empty(); }
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private:
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Vector<unsigned> backing_;
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};
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// Wrapper around ScriptData to provide parser-specific functionality.
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class ParseData {
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public:
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static ParseData* FromCachedData(ScriptData* cached_data) {
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ParseData* pd = new ParseData(cached_data);
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if (pd->IsSane()) return pd;
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cached_data->Reject();
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delete pd;
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return NULL;
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}
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void Initialize();
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FunctionEntry GetFunctionEntry(int start);
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int FunctionCount();
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bool HasError();
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unsigned* Data() { // Writable data as unsigned int array.
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return reinterpret_cast<unsigned*>(const_cast<byte*>(script_data_->data()));
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}
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void Reject() { script_data_->Reject(); }
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bool rejected() const { return script_data_->rejected(); }
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private:
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explicit ParseData(ScriptData* script_data) : script_data_(script_data) {}
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bool IsSane();
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unsigned Magic();
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unsigned Version();
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int FunctionsSize();
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int Length() const {
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// Script data length is already checked to be a multiple of unsigned size.
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return script_data_->length() / sizeof(unsigned);
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}
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ScriptData* script_data_;
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int function_index_;
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DISALLOW_COPY_AND_ASSIGN(ParseData);
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};
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// ----------------------------------------------------------------------------
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// REGEXP PARSING
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// A BufferedZoneList is an automatically growing list, just like (and backed
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// by) a ZoneList, that is optimized for the case of adding and removing
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// a single element. The last element added is stored outside the backing list,
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// and if no more than one element is ever added, the ZoneList isn't even
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// allocated.
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// Elements must not be NULL pointers.
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template <typename T, int initial_size>
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class BufferedZoneList {
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public:
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BufferedZoneList() : list_(NULL), last_(NULL) {}
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// Adds element at end of list. This element is buffered and can
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// be read using last() or removed using RemoveLast until a new Add or until
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// RemoveLast or GetList has been called.
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void Add(T* value, Zone* zone) {
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if (last_ != NULL) {
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if (list_ == NULL) {
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list_ = new(zone) ZoneList<T*>(initial_size, zone);
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}
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list_->Add(last_, zone);
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}
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last_ = value;
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}
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T* last() {
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DCHECK(last_ != NULL);
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return last_;
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}
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T* RemoveLast() {
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DCHECK(last_ != NULL);
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T* result = last_;
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if ((list_ != NULL) && (list_->length() > 0))
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last_ = list_->RemoveLast();
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else
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last_ = NULL;
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return result;
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}
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T* Get(int i) {
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DCHECK((0 <= i) && (i < length()));
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if (list_ == NULL) {
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DCHECK_EQ(0, i);
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return last_;
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} else {
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if (i == list_->length()) {
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DCHECK(last_ != NULL);
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return last_;
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} else {
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return list_->at(i);
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}
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}
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}
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void Clear() {
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list_ = NULL;
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last_ = NULL;
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}
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int length() {
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int length = (list_ == NULL) ? 0 : list_->length();
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return length + ((last_ == NULL) ? 0 : 1);
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}
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ZoneList<T*>* GetList(Zone* zone) {
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if (list_ == NULL) {
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list_ = new(zone) ZoneList<T*>(initial_size, zone);
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}
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if (last_ != NULL) {
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list_->Add(last_, zone);
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last_ = NULL;
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}
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return list_;
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}
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private:
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ZoneList<T*>* list_;
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T* last_;
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};
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// Accumulates RegExp atoms and assertions into lists of terms and alternatives.
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class RegExpBuilder: public ZoneObject {
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public:
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explicit RegExpBuilder(Zone* zone);
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void AddCharacter(uc16 character);
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// "Adds" an empty expression. Does nothing except consume a
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// following quantifier
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void AddEmpty();
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void AddAtom(RegExpTree* tree);
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void AddAssertion(RegExpTree* tree);
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void NewAlternative(); // '|'
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void AddQuantifierToAtom(
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int min, int max, RegExpQuantifier::QuantifierType type);
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RegExpTree* ToRegExp();
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private:
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void FlushCharacters();
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void FlushText();
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void FlushTerms();
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Zone* zone() const { return zone_; }
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Zone* zone_;
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bool pending_empty_;
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ZoneList<uc16>* characters_;
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BufferedZoneList<RegExpTree, 2> terms_;
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BufferedZoneList<RegExpTree, 2> text_;
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BufferedZoneList<RegExpTree, 2> alternatives_;
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#ifdef DEBUG
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enum {ADD_NONE, ADD_CHAR, ADD_TERM, ADD_ASSERT, ADD_ATOM} last_added_;
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#define LAST(x) last_added_ = x;
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#else
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#define LAST(x)
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#endif
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};
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class RegExpParser BASE_EMBEDDED {
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public:
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RegExpParser(FlatStringReader* in, Handle<String>* error, bool multiline_mode,
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bool unicode, Isolate* isolate, Zone* zone);
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static bool ParseRegExp(Isolate* isolate, Zone* zone, FlatStringReader* input,
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bool multiline, bool unicode,
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RegExpCompileData* result);
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RegExpTree* ParsePattern();
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RegExpTree* ParseDisjunction();
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RegExpTree* ParseGroup();
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RegExpTree* ParseCharacterClass();
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// Parses a {...,...} quantifier and stores the range in the given
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// out parameters.
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bool ParseIntervalQuantifier(int* min_out, int* max_out);
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// Parses and returns a single escaped character. The character
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// must not be 'b' or 'B' since they are usually handle specially.
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uc32 ParseClassCharacterEscape();
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// Checks whether the following is a length-digit hexadecimal number,
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// and sets the value if it is.
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bool ParseHexEscape(int length, uc32* value);
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bool ParseUnicodeEscape(uc32* value);
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bool ParseUnlimitedLengthHexNumber(int max_value, uc32* value);
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uc32 ParseOctalLiteral();
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// Tries to parse the input as a back reference. If successful it
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// stores the result in the output parameter and returns true. If
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// it fails it will push back the characters read so the same characters
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// can be reparsed.
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bool ParseBackReferenceIndex(int* index_out);
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CharacterRange ParseClassAtom(uc16* char_class);
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RegExpTree* ReportError(Vector<const char> message);
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void Advance();
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void Advance(int dist);
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void Reset(int pos);
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// Reports whether the pattern might be used as a literal search string.
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// Only use if the result of the parse is a single atom node.
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bool simple();
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bool contains_anchor() { return contains_anchor_; }
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void set_contains_anchor() { contains_anchor_ = true; }
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int captures_started() { return captures_ == NULL ? 0 : captures_->length(); }
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int position() { return next_pos_ - 1; }
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bool failed() { return failed_; }
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static bool IsSyntaxCharacter(uc32 c);
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static const int kMaxCaptures = 1 << 16;
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static const uc32 kEndMarker = (1 << 21);
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private:
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enum SubexpressionType {
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INITIAL,
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CAPTURE, // All positive values represent captures.
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POSITIVE_LOOKAHEAD,
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NEGATIVE_LOOKAHEAD,
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GROUPING
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};
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class RegExpParserState : public ZoneObject {
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public:
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RegExpParserState(RegExpParserState* previous_state,
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SubexpressionType group_type,
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int disjunction_capture_index,
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Zone* zone)
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: previous_state_(previous_state),
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builder_(new(zone) RegExpBuilder(zone)),
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group_type_(group_type),
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disjunction_capture_index_(disjunction_capture_index) {}
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// Parser state of containing expression, if any.
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RegExpParserState* previous_state() { return previous_state_; }
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bool IsSubexpression() { return previous_state_ != NULL; }
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// RegExpBuilder building this regexp's AST.
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RegExpBuilder* builder() { return builder_; }
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// Type of regexp being parsed (parenthesized group or entire regexp).
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SubexpressionType group_type() { return group_type_; }
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// Index in captures array of first capture in this sub-expression, if any.
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// Also the capture index of this sub-expression itself, if group_type
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// is CAPTURE.
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int capture_index() { return disjunction_capture_index_; }
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private:
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// Linked list implementation of stack of states.
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RegExpParserState* previous_state_;
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// Builder for the stored disjunction.
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RegExpBuilder* builder_;
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// Stored disjunction type (capture, look-ahead or grouping), if any.
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SubexpressionType group_type_;
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// Stored disjunction's capture index (if any).
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int disjunction_capture_index_;
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};
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Isolate* isolate() { return isolate_; }
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Zone* zone() const { return zone_; }
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uc32 current() { return current_; }
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bool has_more() { return has_more_; }
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bool has_next() { return next_pos_ < in()->length(); }
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uc32 Next();
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FlatStringReader* in() { return in_; }
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void ScanForCaptures();
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Isolate* isolate_;
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Zone* zone_;
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Handle<String>* error_;
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ZoneList<RegExpCapture*>* captures_;
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FlatStringReader* in_;
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uc32 current_;
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int next_pos_;
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// The capture count is only valid after we have scanned for captures.
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int capture_count_;
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bool has_more_;
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bool multiline_;
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bool unicode_;
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bool simple_;
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bool contains_anchor_;
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bool is_scanned_for_captures_;
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bool failed_;
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};
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// ----------------------------------------------------------------------------
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// JAVASCRIPT PARSING
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class Parser;
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class SingletonLogger;
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class ParserTraits {
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public:
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struct Type {
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// TODO(marja): To be removed. The Traits object should contain all the data
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// it needs.
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typedef v8::internal::Parser* Parser;
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typedef Variable GeneratorVariable;
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typedef v8::internal::AstProperties AstProperties;
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// Return types for traversing functions.
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typedef const AstRawString* Identifier;
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typedef v8::internal::Expression* Expression;
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typedef Yield* YieldExpression;
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typedef v8::internal::FunctionLiteral* FunctionLiteral;
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typedef v8::internal::ClassLiteral* ClassLiteral;
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typedef v8::internal::Literal* Literal;
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typedef ObjectLiteral::Property* ObjectLiteralProperty;
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typedef ZoneList<v8::internal::Expression*>* ExpressionList;
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typedef ZoneList<ObjectLiteral::Property*>* PropertyList;
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typedef ZoneList<v8::internal::Statement*>* StatementList;
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// For constructing objects returned by the traversing functions.
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typedef AstNodeFactory Factory;
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};
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explicit ParserTraits(Parser* parser) : parser_(parser) {}
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// Helper functions for recursive descent.
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bool IsEval(const AstRawString* identifier) const;
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bool IsArguments(const AstRawString* identifier) const;
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bool IsEvalOrArguments(const AstRawString* identifier) const;
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V8_INLINE bool IsFutureStrictReserved(const AstRawString* identifier) const;
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// Returns true if the expression is of type "this.foo".
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static bool IsThisProperty(Expression* expression);
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static bool IsIdentifier(Expression* expression);
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bool IsPrototype(const AstRawString* identifier) const;
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bool IsConstructor(const AstRawString* identifier) const;
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static const AstRawString* AsIdentifier(Expression* expression) {
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DCHECK(IsIdentifier(expression));
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return expression->AsVariableProxy()->raw_name();
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}
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static bool IsBoilerplateProperty(ObjectLiteral::Property* property) {
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return ObjectLiteral::IsBoilerplateProperty(property);
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}
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static bool IsArrayIndex(const AstRawString* string, uint32_t* index) {
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return string->AsArrayIndex(index);
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}
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static Expression* GetPropertyValue(ObjectLiteral::Property* property) {
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return property->value();
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}
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// Functions for encapsulating the differences between parsing and preparsing;
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// operations interleaved with the recursive descent.
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static void PushLiteralName(FuncNameInferrer* fni, const AstRawString* id) {
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fni->PushLiteralName(id);
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}
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void PushPropertyName(FuncNameInferrer* fni, Expression* expression);
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static void InferFunctionName(FuncNameInferrer* fni,
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FunctionLiteral* func_to_infer) {
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fni->AddFunction(func_to_infer);
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}
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static void CheckFunctionLiteralInsideTopLevelObjectLiteral(
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Scope* scope, ObjectLiteralProperty* property, bool* has_function) {
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Expression* value = property->value();
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if (scope->DeclarationScope()->is_script_scope() &&
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value->AsFunctionLiteral() != NULL) {
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*has_function = true;
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value->AsFunctionLiteral()->set_pretenure();
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}
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}
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// If we assign a function literal to a property we pretenure the
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// literal so it can be added as a constant function property.
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static void CheckAssigningFunctionLiteralToProperty(Expression* left,
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Expression* right);
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// Keep track of eval() calls since they disable all local variable
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// optimizations. This checks if expression is an eval call, and if yes,
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// forwards the information to scope.
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void CheckPossibleEvalCall(Expression* expression, Scope* scope);
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// Determine if the expression is a variable proxy and mark it as being used
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// in an assignment or with a increment/decrement operator.
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static Expression* MarkExpressionAsAssigned(Expression* expression);
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// Returns true if we have a binary expression between two numeric
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// literals. In that case, *x will be changed to an expression which is the
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// computed value.
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bool ShortcutNumericLiteralBinaryExpression(Expression** x, Expression* y,
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Token::Value op, int pos,
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AstNodeFactory* factory);
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// Rewrites the following types of unary expressions:
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// not <literal> -> true / false
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// + <numeric literal> -> <numeric literal>
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// - <numeric literal> -> <numeric literal with value negated>
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// ! <literal> -> true / false
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// The following rewriting rules enable the collection of type feedback
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// without any special stub and the multiplication is removed later in
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// Crankshaft's canonicalization pass.
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// + foo -> foo * 1
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// - foo -> foo * (-1)
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// ~ foo -> foo ^(~0)
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Expression* BuildUnaryExpression(Expression* expression, Token::Value op,
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int pos, AstNodeFactory* factory);
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// Generate AST node that throws a ReferenceError with the given type.
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Expression* NewThrowReferenceError(const char* type, int pos);
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// Generate AST node that throws a SyntaxError with the given
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// type. The first argument may be null (in the handle sense) in
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// which case no arguments are passed to the constructor.
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Expression* NewThrowSyntaxError(
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const char* type, const AstRawString* arg, int pos);
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// Generate AST node that throws a TypeError with the given
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// type. Both arguments must be non-null (in the handle sense).
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Expression* NewThrowTypeError(const char* type, const AstRawString* arg,
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int pos);
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// Generic AST generator for throwing errors from compiled code.
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Expression* NewThrowError(
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const AstRawString* constructor, const char* type,
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const AstRawString* arg, int pos);
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// Reporting errors.
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void ReportMessageAt(Scanner::Location source_location,
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const char* message,
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const char* arg = NULL,
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bool is_reference_error = false);
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void ReportMessage(const char* message,
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const char* arg = NULL,
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bool is_reference_error = false);
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void ReportMessage(const char* message,
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const AstRawString* arg,
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bool is_reference_error = false);
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void ReportMessageAt(Scanner::Location source_location,
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const char* message,
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const AstRawString* arg,
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bool is_reference_error = false);
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// "null" return type creators.
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static const AstRawString* EmptyIdentifier() {
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return NULL;
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}
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static Expression* EmptyExpression() {
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return NULL;
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}
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static Expression* EmptyArrowParamList() { return NULL; }
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static Literal* EmptyLiteral() {
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return NULL;
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}
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static ObjectLiteralProperty* EmptyObjectLiteralProperty() { return NULL; }
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static FunctionLiteral* EmptyFunctionLiteral() { return NULL; }
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// Used in error return values.
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static ZoneList<Expression*>* NullExpressionList() {
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return NULL;
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}
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// Non-NULL empty string.
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V8_INLINE const AstRawString* EmptyIdentifierString();
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// Odd-ball literal creators.
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Literal* GetLiteralTheHole(int position, AstNodeFactory* factory);
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// Producing data during the recursive descent.
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const AstRawString* GetSymbol(Scanner* scanner);
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const AstRawString* GetNextSymbol(Scanner* scanner);
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|
const AstRawString* GetNumberAsSymbol(Scanner* scanner);
|
|
|
|
Expression* ThisExpression(Scope* scope, AstNodeFactory* factory,
|
|
int pos = RelocInfo::kNoPosition);
|
|
Expression* SuperReference(Scope* scope, AstNodeFactory* factory,
|
|
int pos = RelocInfo::kNoPosition);
|
|
Expression* DefaultConstructor(bool call_super, Scope* scope, int pos,
|
|
int end_pos);
|
|
Literal* ExpressionFromLiteral(Token::Value token, int pos, Scanner* scanner,
|
|
AstNodeFactory* factory);
|
|
Expression* ExpressionFromIdentifier(const AstRawString* name, int pos,
|
|
Scope* scope, AstNodeFactory* factory);
|
|
Expression* ExpressionFromString(int pos, Scanner* scanner,
|
|
AstNodeFactory* factory);
|
|
Expression* GetIterator(Expression* iterable, AstNodeFactory* factory);
|
|
ZoneList<v8::internal::Expression*>* NewExpressionList(int size, Zone* zone) {
|
|
return new(zone) ZoneList<v8::internal::Expression*>(size, zone);
|
|
}
|
|
ZoneList<ObjectLiteral::Property*>* NewPropertyList(int size, Zone* zone) {
|
|
return new(zone) ZoneList<ObjectLiteral::Property*>(size, zone);
|
|
}
|
|
ZoneList<v8::internal::Statement*>* NewStatementList(int size, Zone* zone) {
|
|
return new(zone) ZoneList<v8::internal::Statement*>(size, zone);
|
|
}
|
|
V8_INLINE Scope* NewScope(Scope* parent_scope, ScopeType scope_type,
|
|
FunctionKind kind = kNormalFunction);
|
|
|
|
// Utility functions
|
|
int DeclareArrowParametersFromExpression(Expression* expression, Scope* scope,
|
|
Scanner::Location* dupe_loc,
|
|
bool* ok);
|
|
|
|
// Temporary glue; these functions will move to ParserBase.
|
|
Expression* ParseV8Intrinsic(bool* ok);
|
|
FunctionLiteral* ParseFunctionLiteral(
|
|
const AstRawString* name, Scanner::Location function_name_location,
|
|
bool name_is_strict_reserved, FunctionKind kind,
|
|
int function_token_position, FunctionLiteral::FunctionType type,
|
|
FunctionLiteral::ArityRestriction arity_restriction, bool* ok);
|
|
V8_INLINE void SkipLazyFunctionBody(const AstRawString* name,
|
|
int* materialized_literal_count,
|
|
int* expected_property_count, bool* ok);
|
|
V8_INLINE ZoneList<Statement*>* ParseEagerFunctionBody(
|
|
const AstRawString* name, int pos, Variable* fvar,
|
|
Token::Value fvar_init_op, FunctionKind kind, bool* ok);
|
|
|
|
ClassLiteral* ParseClassLiteral(const AstRawString* name,
|
|
Scanner::Location class_name_location,
|
|
bool name_is_strict_reserved, int pos,
|
|
bool* ok);
|
|
|
|
V8_INLINE void CheckConflictingVarDeclarations(v8::internal::Scope* scope,
|
|
bool* ok);
|
|
|
|
class TemplateLiteral : public ZoneObject {
|
|
public:
|
|
TemplateLiteral(Zone* zone, int pos)
|
|
: cooked_(8, zone), raw_(8, zone), expressions_(8, zone), pos_(pos) {}
|
|
|
|
const ZoneList<Expression*>* cooked() const { return &cooked_; }
|
|
const ZoneList<Expression*>* raw() const { return &raw_; }
|
|
const ZoneList<Expression*>* expressions() const { return &expressions_; }
|
|
int position() const { return pos_; }
|
|
|
|
void AddTemplateSpan(Literal* cooked, Literal* raw, int end, Zone* zone) {
|
|
DCHECK_NOT_NULL(cooked);
|
|
DCHECK_NOT_NULL(raw);
|
|
cooked_.Add(cooked, zone);
|
|
raw_.Add(raw, zone);
|
|
}
|
|
|
|
void AddExpression(Expression* expression, Zone* zone) {
|
|
DCHECK_NOT_NULL(expression);
|
|
expressions_.Add(expression, zone);
|
|
}
|
|
|
|
private:
|
|
ZoneList<Expression*> cooked_;
|
|
ZoneList<Expression*> raw_;
|
|
ZoneList<Expression*> expressions_;
|
|
int pos_;
|
|
};
|
|
|
|
typedef TemplateLiteral* TemplateLiteralState;
|
|
|
|
V8_INLINE TemplateLiteralState OpenTemplateLiteral(int pos);
|
|
V8_INLINE void AddTemplateSpan(TemplateLiteralState* state, bool tail);
|
|
V8_INLINE void AddTemplateExpression(TemplateLiteralState* state,
|
|
Expression* expression);
|
|
V8_INLINE Expression* CloseTemplateLiteral(TemplateLiteralState* state,
|
|
int start, Expression* tag);
|
|
V8_INLINE Expression* NoTemplateTag() { return NULL; }
|
|
V8_INLINE static bool IsTaggedTemplate(const Expression* tag) {
|
|
return tag != NULL;
|
|
}
|
|
|
|
private:
|
|
Parser* parser_;
|
|
};
|
|
|
|
|
|
class Parser : public ParserBase<ParserTraits> {
|
|
public:
|
|
Parser(CompilationInfo* info, uintptr_t stack_limit, uint32_t hash_seed,
|
|
UnicodeCache* unicode_cache);
|
|
~Parser() {
|
|
delete reusable_preparser_;
|
|
reusable_preparser_ = NULL;
|
|
delete cached_parse_data_;
|
|
cached_parse_data_ = NULL;
|
|
}
|
|
|
|
// Parses the source code represented by the compilation info and sets its
|
|
// function literal. Returns false (and deallocates any allocated AST
|
|
// nodes) if parsing failed.
|
|
static bool ParseStatic(CompilationInfo* info, bool allow_lazy = false);
|
|
bool Parse(CompilationInfo* info);
|
|
void ParseOnBackground(CompilationInfo* info);
|
|
|
|
// Handle errors detected during parsing, move statistics to Isolate,
|
|
// internalize strings (move them to the heap).
|
|
void Internalize(Isolate* isolate, Handle<Script> script, bool error);
|
|
void HandleSourceURLComments(Isolate* isolate, Handle<Script> script);
|
|
|
|
private:
|
|
friend class ParserTraits;
|
|
|
|
// Limit the allowed number of local variables in a function. The hard limit
|
|
// is that offsets computed by FullCodeGenerator::StackOperand and similar
|
|
// functions are ints, and they should not overflow. In addition, accessing
|
|
// local variables creates user-controlled constants in the generated code,
|
|
// and we don't want too much user-controlled memory inside the code (this was
|
|
// the reason why this limit was introduced in the first place; see
|
|
// https://codereview.chromium.org/7003030/ ).
|
|
static const int kMaxNumFunctionLocals = 4194303; // 2^22-1
|
|
|
|
// Returns NULL if parsing failed.
|
|
FunctionLiteral* ParseProgram(Isolate* isolate, CompilationInfo* info);
|
|
|
|
FunctionLiteral* ParseLazy(Isolate* isolate, CompilationInfo* info);
|
|
FunctionLiteral* ParseLazy(Isolate* isolate, CompilationInfo* info,
|
|
Utf16CharacterStream* source);
|
|
|
|
// Called by ParseProgram after setting up the scanner.
|
|
FunctionLiteral* DoParseProgram(CompilationInfo* info, Scope** scope,
|
|
Scope** ad_hoc_eval_scope);
|
|
|
|
void SetCachedData(CompilationInfo* info);
|
|
|
|
bool inside_with() const { return scope_->inside_with(); }
|
|
ScriptCompiler::CompileOptions compile_options() const {
|
|
return compile_options_;
|
|
}
|
|
bool consume_cached_parse_data() const {
|
|
return compile_options_ == ScriptCompiler::kConsumeParserCache &&
|
|
cached_parse_data_ != NULL;
|
|
}
|
|
bool produce_cached_parse_data() const {
|
|
return compile_options_ == ScriptCompiler::kProduceParserCache;
|
|
}
|
|
Scope* DeclarationScope(VariableMode mode) {
|
|
return IsLexicalVariableMode(mode)
|
|
? scope_ : scope_->DeclarationScope();
|
|
}
|
|
|
|
// All ParseXXX functions take as the last argument an *ok parameter
|
|
// which is set to false if parsing failed; it is unchanged otherwise.
|
|
// By making the 'exception handling' explicit, we are forced to check
|
|
// for failure at the call sites.
|
|
void* ParseStatementList(ZoneList<Statement*>* body, int end_token,
|
|
bool is_eval, Scope** ad_hoc_eval_scope, bool* ok);
|
|
Statement* ParseStatementListItem(bool* ok);
|
|
Statement* ParseModule(bool* ok);
|
|
Statement* ParseModuleItem(bool* ok);
|
|
Literal* ParseModuleSpecifier(bool* ok);
|
|
Statement* ParseImportDeclaration(bool* ok);
|
|
Statement* ParseExportDeclaration(bool* ok);
|
|
Statement* ParseExportDefault(bool* ok);
|
|
void* ParseExportClause(ZoneList<const AstRawString*>* export_names,
|
|
ZoneList<Scanner::Location>* export_locations,
|
|
ZoneList<const AstRawString*>* local_names,
|
|
Scanner::Location* reserved_loc, bool* ok);
|
|
void* ParseNamedImports(ZoneList<const AstRawString*>* names, bool* ok);
|
|
Statement* ParseStatement(ZoneList<const AstRawString*>* labels, bool* ok);
|
|
Statement* ParseSubStatement(ZoneList<const AstRawString*>* labels, bool* ok);
|
|
Statement* ParseFunctionDeclaration(ZoneList<const AstRawString*>* names,
|
|
bool* ok);
|
|
Statement* ParseClassDeclaration(ZoneList<const AstRawString*>* names,
|
|
bool* ok);
|
|
Statement* ParseNativeDeclaration(bool* ok);
|
|
Block* ParseBlock(ZoneList<const AstRawString*>* labels, bool* ok);
|
|
Block* ParseVariableStatement(VariableDeclarationContext var_context,
|
|
ZoneList<const AstRawString*>* names,
|
|
bool* ok);
|
|
Block* ParseVariableDeclarations(VariableDeclarationContext var_context,
|
|
VariableDeclarationProperties* decl_props,
|
|
ZoneList<const AstRawString*>* names,
|
|
const AstRawString** out,
|
|
bool* ok);
|
|
Statement* ParseExpressionOrLabelledStatement(
|
|
ZoneList<const AstRawString*>* labels, bool* ok);
|
|
IfStatement* ParseIfStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
Statement* ParseContinueStatement(bool* ok);
|
|
Statement* ParseBreakStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
Statement* ParseReturnStatement(bool* ok);
|
|
Statement* ParseWithStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
CaseClause* ParseCaseClause(bool* default_seen_ptr, bool* ok);
|
|
SwitchStatement* ParseSwitchStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
DoWhileStatement* ParseDoWhileStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
WhileStatement* ParseWhileStatement(ZoneList<const AstRawString*>* labels,
|
|
bool* ok);
|
|
Statement* ParseForStatement(ZoneList<const AstRawString*>* labels, bool* ok);
|
|
Statement* ParseThrowStatement(bool* ok);
|
|
Expression* MakeCatchContext(Handle<String> id, VariableProxy* value);
|
|
TryStatement* ParseTryStatement(bool* ok);
|
|
DebuggerStatement* ParseDebuggerStatement(bool* ok);
|
|
|
|
// Support for hamony block scoped bindings.
|
|
Block* ParseScopedBlock(ZoneList<const AstRawString*>* labels, bool* ok);
|
|
|
|
// Initialize the components of a for-in / for-of statement.
|
|
void InitializeForEachStatement(ForEachStatement* stmt,
|
|
Expression* each,
|
|
Expression* subject,
|
|
Statement* body);
|
|
Statement* DesugarLetBindingsInForStatement(
|
|
Scope* inner_scope, ZoneList<const AstRawString*>* names,
|
|
ForStatement* loop, Statement* init, Expression* cond, Statement* next,
|
|
Statement* body, bool* ok);
|
|
|
|
FunctionLiteral* ParseFunctionLiteral(
|
|
const AstRawString* name, Scanner::Location function_name_location,
|
|
bool name_is_strict_reserved, FunctionKind kind,
|
|
int function_token_position, FunctionLiteral::FunctionType type,
|
|
FunctionLiteral::ArityRestriction arity_restriction, bool* ok);
|
|
|
|
|
|
ClassLiteral* ParseClassLiteral(const AstRawString* name,
|
|
Scanner::Location class_name_location,
|
|
bool name_is_strict_reserved, int pos,
|
|
bool* ok);
|
|
|
|
// Magical syntax support.
|
|
Expression* ParseV8Intrinsic(bool* ok);
|
|
|
|
// Get odd-ball literals.
|
|
Literal* GetLiteralUndefined(int position);
|
|
|
|
// For harmony block scoping mode: Check if the scope has conflicting var/let
|
|
// declarations from different scopes. It covers for example
|
|
//
|
|
// function f() { { { var x; } let x; } }
|
|
// function g() { { var x; let x; } }
|
|
//
|
|
// The var declarations are hoisted to the function scope, but originate from
|
|
// a scope where the name has also been let bound or the var declaration is
|
|
// hoisted over such a scope.
|
|
void CheckConflictingVarDeclarations(Scope* scope, bool* ok);
|
|
|
|
// Parser support
|
|
VariableProxy* NewUnresolved(const AstRawString* name, VariableMode mode);
|
|
void Declare(Declaration* declaration, bool resolve, bool* ok);
|
|
|
|
bool TargetStackContainsLabel(const AstRawString* label);
|
|
BreakableStatement* LookupBreakTarget(const AstRawString* label, bool* ok);
|
|
IterationStatement* LookupContinueTarget(const AstRawString* label, bool* ok);
|
|
|
|
void AddAssertIsConstruct(ZoneList<Statement*>* body, int pos);
|
|
|
|
// Factory methods.
|
|
FunctionLiteral* DefaultConstructor(bool call_super, Scope* scope, int pos,
|
|
int end_pos);
|
|
|
|
// Skip over a lazy function, either using cached data if we have it, or
|
|
// by parsing the function with PreParser. Consumes the ending }.
|
|
void SkipLazyFunctionBody(const AstRawString* function_name,
|
|
int* materialized_literal_count,
|
|
int* expected_property_count,
|
|
bool* ok);
|
|
|
|
PreParser::PreParseResult ParseLazyFunctionBodyWithPreParser(
|
|
SingletonLogger* logger);
|
|
|
|
// Consumes the ending }.
|
|
ZoneList<Statement*>* ParseEagerFunctionBody(
|
|
const AstRawString* function_name, int pos, Variable* fvar,
|
|
Token::Value fvar_init_op, FunctionKind kind, bool* ok);
|
|
|
|
void ThrowPendingError(Isolate* isolate, Handle<Script> script);
|
|
|
|
TemplateLiteralState OpenTemplateLiteral(int pos);
|
|
void AddTemplateSpan(TemplateLiteralState* state, bool tail);
|
|
void AddTemplateExpression(TemplateLiteralState* state,
|
|
Expression* expression);
|
|
Expression* CloseTemplateLiteral(TemplateLiteralState* state, int start,
|
|
Expression* tag);
|
|
uint32_t ComputeTemplateLiteralHash(const TemplateLiteral* lit);
|
|
|
|
Scanner scanner_;
|
|
PreParser* reusable_preparser_;
|
|
Scope* original_scope_; // for ES5 function declarations in sloppy eval
|
|
Target* target_stack_; // for break, continue statements
|
|
ScriptCompiler::CompileOptions compile_options_;
|
|
ParseData* cached_parse_data_;
|
|
|
|
bool parsing_lazy_arrow_parameters_; // for lazily parsed arrow functions.
|
|
|
|
// Pending errors.
|
|
bool has_pending_error_;
|
|
Scanner::Location pending_error_location_;
|
|
const char* pending_error_message_;
|
|
const AstRawString* pending_error_arg_;
|
|
const char* pending_error_char_arg_;
|
|
bool pending_error_is_reference_error_;
|
|
|
|
// Other information which will be stored in Parser and moved to Isolate after
|
|
// parsing.
|
|
int use_counts_[v8::Isolate::kUseCounterFeatureCount];
|
|
int total_preparse_skipped_;
|
|
HistogramTimer* pre_parse_timer_;
|
|
|
|
bool parsing_on_main_thread_;
|
|
};
|
|
|
|
|
|
bool ParserTraits::IsFutureStrictReserved(
|
|
const AstRawString* identifier) const {
|
|
return parser_->scanner()->IdentifierIsFutureStrictReserved(identifier);
|
|
}
|
|
|
|
|
|
Scope* ParserTraits::NewScope(Scope* parent_scope, ScopeType scope_type,
|
|
FunctionKind kind) {
|
|
return parser_->NewScope(parent_scope, scope_type, kind);
|
|
}
|
|
|
|
|
|
const AstRawString* ParserTraits::EmptyIdentifierString() {
|
|
return parser_->ast_value_factory()->empty_string();
|
|
}
|
|
|
|
|
|
void ParserTraits::SkipLazyFunctionBody(const AstRawString* function_name,
|
|
int* materialized_literal_count,
|
|
int* expected_property_count,
|
|
bool* ok) {
|
|
return parser_->SkipLazyFunctionBody(
|
|
function_name, materialized_literal_count, expected_property_count, ok);
|
|
}
|
|
|
|
|
|
ZoneList<Statement*>* ParserTraits::ParseEagerFunctionBody(
|
|
const AstRawString* name, int pos, Variable* fvar,
|
|
Token::Value fvar_init_op, FunctionKind kind, bool* ok) {
|
|
return parser_->ParseEagerFunctionBody(name, pos, fvar, fvar_init_op, kind,
|
|
ok);
|
|
}
|
|
|
|
void ParserTraits::CheckConflictingVarDeclarations(v8::internal::Scope* scope,
|
|
bool* ok) {
|
|
parser_->CheckConflictingVarDeclarations(scope, ok);
|
|
}
|
|
|
|
|
|
// Support for handling complex values (array and object literals) that
|
|
// can be fully handled at compile time.
|
|
class CompileTimeValue: public AllStatic {
|
|
public:
|
|
enum LiteralType {
|
|
OBJECT_LITERAL_FAST_ELEMENTS,
|
|
OBJECT_LITERAL_SLOW_ELEMENTS,
|
|
ARRAY_LITERAL
|
|
};
|
|
|
|
static bool IsCompileTimeValue(Expression* expression);
|
|
|
|
// Get the value as a compile time value.
|
|
static Handle<FixedArray> GetValue(Isolate* isolate, Expression* expression);
|
|
|
|
// Get the type of a compile time value returned by GetValue().
|
|
static LiteralType GetLiteralType(Handle<FixedArray> value);
|
|
|
|
// Get the elements array of a compile time value returned by GetValue().
|
|
static Handle<FixedArray> GetElements(Handle<FixedArray> value);
|
|
|
|
private:
|
|
static const int kLiteralTypeSlot = 0;
|
|
static const int kElementsSlot = 1;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
|
|
};
|
|
|
|
|
|
ParserTraits::TemplateLiteralState ParserTraits::OpenTemplateLiteral(int pos) {
|
|
return parser_->OpenTemplateLiteral(pos);
|
|
}
|
|
|
|
|
|
void ParserTraits::AddTemplateSpan(TemplateLiteralState* state, bool tail) {
|
|
parser_->AddTemplateSpan(state, tail);
|
|
}
|
|
|
|
|
|
void ParserTraits::AddTemplateExpression(TemplateLiteralState* state,
|
|
Expression* expression) {
|
|
parser_->AddTemplateExpression(state, expression);
|
|
}
|
|
|
|
|
|
Expression* ParserTraits::CloseTemplateLiteral(TemplateLiteralState* state,
|
|
int start, Expression* tag) {
|
|
return parser_->CloseTemplateLiteral(state, start, tag);
|
|
}
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_PARSER_H_
|