1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/frontend/Parser.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,673 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef frontend_Parser_h
1.11 +#define frontend_Parser_h
1.12 +
1.13 +/*
1.14 + * JS parser definitions.
1.15 + */
1.16 +
1.17 +#include "jspubtd.h"
1.18 +
1.19 +#include "frontend/BytecodeCompiler.h"
1.20 +#include "frontend/FullParseHandler.h"
1.21 +#include "frontend/ParseMaps.h"
1.22 +#include "frontend/ParseNode.h"
1.23 +#include "frontend/SharedContext.h"
1.24 +#include "frontend/SyntaxParseHandler.h"
1.25 +
1.26 +namespace js {
1.27 +namespace frontend {
1.28 +
1.29 +struct StmtInfoPC : public StmtInfoBase {
1.30 + StmtInfoPC *down; /* info for enclosing statement */
1.31 + StmtInfoPC *downScope; /* next enclosing lexical scope */
1.32 +
1.33 + uint32_t blockid; /* for simplified dominance computation */
1.34 + uint32_t innerBlockScopeDepth; /* maximum depth of nested block scopes, in slots */
1.35 +
1.36 + StmtInfoPC(ExclusiveContext *cx) : StmtInfoBase(cx), innerBlockScopeDepth(0) {}
1.37 +};
1.38 +
1.39 +typedef HashSet<JSAtom *> FuncStmtSet;
1.40 +class SharedContext;
1.41 +
1.42 +typedef Vector<Definition *, 16> DeclVector;
1.43 +
1.44 +struct GenericParseContext
1.45 +{
1.46 + // Enclosing function or global context.
1.47 + GenericParseContext *parent;
1.48 +
1.49 + // Context shared between parsing and bytecode generation.
1.50 + SharedContext *sc;
1.51 +
1.52 + // The following flags are set when a particular code feature is detected
1.53 + // in a function.
1.54 +
1.55 + // Function has 'return <expr>;'
1.56 + bool funHasReturnExpr:1;
1.57 +
1.58 + // Function has 'return;'
1.59 + bool funHasReturnVoid:1;
1.60 +
1.61 + // The following flags are set when parsing enters a particular region of
1.62 + // source code, and cleared when that region is exited.
1.63 +
1.64 + // true while parsing init expr of for; exclude 'in'
1.65 + bool parsingForInit:1;
1.66 +
1.67 + // true while we are within a with-statement in the current ParseContext
1.68 + // chain (which stops at the top-level or an eval()
1.69 + bool parsingWith:1;
1.70 +
1.71 + GenericParseContext(GenericParseContext *parent, SharedContext *sc)
1.72 + : parent(parent),
1.73 + sc(sc),
1.74 + funHasReturnExpr(false),
1.75 + funHasReturnVoid(false),
1.76 + parsingForInit(false),
1.77 + parsingWith(parent ? parent->parsingWith : false)
1.78 + {}
1.79 +};
1.80 +
1.81 +template <typename ParseHandler>
1.82 +bool
1.83 +GenerateBlockId(TokenStream &ts, ParseContext<ParseHandler> *pc, uint32_t &blockid);
1.84 +
1.85 +/*
1.86 + * The struct ParseContext stores information about the current parsing context,
1.87 + * which is part of the parser state (see the field Parser::pc). The current
1.88 + * parsing context is either the global context, or the function currently being
1.89 + * parsed. When the parser encounters a function definition, it creates a new
1.90 + * ParseContext, makes it the new current context, and sets its parent to the
1.91 + * context in which it encountered the definition.
1.92 + */
1.93 +template <typename ParseHandler>
1.94 +struct ParseContext : public GenericParseContext
1.95 +{
1.96 + typedef StmtInfoPC StmtInfo;
1.97 + typedef typename ParseHandler::Node Node;
1.98 + typedef typename ParseHandler::DefinitionNode DefinitionNode;
1.99 +
1.100 + uint32_t bodyid; /* block number of program/function body */
1.101 + uint32_t blockidGen; /* preincremented block number generator */
1.102 +
1.103 + StmtInfoPC *topStmt; /* top of statement info stack */
1.104 + StmtInfoPC *topScopeStmt; /* top lexical scope statement */
1.105 + Rooted<NestedScopeObject *> staticScope; /* compile time scope chain */
1.106 + Node maybeFunction; /* sc->isFunctionBox, the pn where pn->pn_funbox == sc */
1.107 +
1.108 + const unsigned staticLevel; /* static compilation unit nesting level */
1.109 +
1.110 + // lastYieldOffset stores the offset of the last yield that was parsed.
1.111 + // NoYieldOffset is its initial value.
1.112 + static const uint32_t NoYieldOffset = UINT32_MAX;
1.113 + uint32_t lastYieldOffset;
1.114 +
1.115 + // Most functions start off being parsed as non-generators.
1.116 + // Non-generators transition to LegacyGenerator on parsing "yield" in JS 1.7.
1.117 + // An ES6 generator is marked as a "star generator" before its body is parsed.
1.118 + GeneratorKind generatorKind() const {
1.119 + return sc->isFunctionBox() ? sc->asFunctionBox()->generatorKind() : NotGenerator;
1.120 + }
1.121 + bool isGenerator() const { return generatorKind() != NotGenerator; }
1.122 + bool isLegacyGenerator() const { return generatorKind() == LegacyGenerator; }
1.123 + bool isStarGenerator() const { return generatorKind() == StarGenerator; }
1.124 +
1.125 + bool isArrowFunction() const {
1.126 + return sc->isFunctionBox() && sc->asFunctionBox()->function()->isArrow();
1.127 + }
1.128 +
1.129 + uint32_t blockScopeDepth; /* maximum depth of nested block scopes, in slots */
1.130 + Node blockNode; /* parse node for a block with let declarations
1.131 + (block with its own lexical scope) */
1.132 + private:
1.133 + AtomDecls<ParseHandler> decls_; /* function, const, and var declarations */
1.134 + DeclVector args_; /* argument definitions */
1.135 + DeclVector vars_; /* var/const definitions */
1.136 +
1.137 + public:
1.138 + const AtomDecls<ParseHandler> &decls() const {
1.139 + return decls_;
1.140 + }
1.141 +
1.142 + uint32_t numArgs() const {
1.143 + JS_ASSERT(sc->isFunctionBox());
1.144 + return args_.length();
1.145 + }
1.146 +
1.147 + /*
1.148 + * This function adds a definition to the lexical scope represented by this
1.149 + * ParseContext.
1.150 + *
1.151 + * Pre-conditions:
1.152 + * + The caller must have already taken care of name collisions:
1.153 + * - For non-let definitions, this means 'name' isn't in 'decls'.
1.154 + * - For let definitions, this means 'name' isn't already a name in the
1.155 + * current block.
1.156 + * + The given 'pn' is either a placeholder (created by a previous unbound
1.157 + * use) or an un-bound un-linked name node.
1.158 + * + The given 'kind' is one of ARG, CONST, VAR, or LET. In particular,
1.159 + * NAMED_LAMBDA is handled in an ad hoc special case manner (see
1.160 + * LeaveFunction) that we should consider rewriting.
1.161 + *
1.162 + * Post-conditions:
1.163 + * + pc->decls().lookupFirst(name) == pn
1.164 + * + The given name 'pn' has been converted in-place into a
1.165 + * non-placeholder definition.
1.166 + * + If this is a function scope (sc->inFunction), 'pn' is bound to a
1.167 + * particular local/argument slot.
1.168 + * + PND_CONST is set for Definition::COSNT
1.169 + * + Pre-existing uses of pre-existing placeholders have been linked to
1.170 + * 'pn' if they are in the scope of 'pn'.
1.171 + * + Pre-existing placeholders in the scope of 'pn' have been removed.
1.172 + */
1.173 + bool define(TokenStream &ts, HandlePropertyName name, Node pn, Definition::Kind);
1.174 +
1.175 + /*
1.176 + * Let definitions may shadow same-named definitions in enclosing scopes.
1.177 + * To represesent this, 'decls' is not a plain map, but actually:
1.178 + * decls :: name -> stack of definitions
1.179 + * New bindings are pushed onto the stack, name lookup always refers to the
1.180 + * top of the stack, and leaving a block scope calls popLetDecl for each
1.181 + * name in the block's scope.
1.182 + */
1.183 + void popLetDecl(JSAtom *atom);
1.184 +
1.185 + /* See the sad story in defineArg. */
1.186 + void prepareToAddDuplicateArg(HandlePropertyName name, DefinitionNode prevDecl);
1.187 +
1.188 + /* See the sad story in MakeDefIntoUse. */
1.189 + void updateDecl(JSAtom *atom, Node newDecl);
1.190 +
1.191 + /*
1.192 + * After a function body has been parsed, the parser generates the
1.193 + * function's "bindings". Bindings are a data-structure, ultimately stored
1.194 + * in the compiled JSScript, that serve three purposes:
1.195 + * - After parsing, the ParseContext is destroyed and 'decls' along with
1.196 + * it. Mostly, the emitter just uses the binding information stored in
1.197 + * the use/def nodes, but the emitter occasionally needs 'bindings' for
1.198 + * various scope-related queries.
1.199 + * - Bindings provide the initial js::Shape to use when creating a dynamic
1.200 + * scope object (js::CallObject) for the function. This shape is used
1.201 + * during dynamic name lookup.
1.202 + * - Sometimes a script's bindings are accessed at runtime to retrieve the
1.203 + * contents of the lexical scope (e.g., from the debugger).
1.204 + */
1.205 + bool generateFunctionBindings(ExclusiveContext *cx, TokenStream &ts,
1.206 + LifoAlloc &alloc,
1.207 + InternalHandle<Bindings*> bindings) const;
1.208 +
1.209 + private:
1.210 + ParseContext **parserPC; /* this points to the Parser's active pc
1.211 + and holds either |this| or one of
1.212 + |this|'s descendents */
1.213 +
1.214 + // Value for parserPC to restore at the end. Use 'parent' instead for
1.215 + // information about the parse chain, this may be nullptr if
1.216 + // parent != nullptr.
1.217 + ParseContext<ParseHandler> *oldpc;
1.218 +
1.219 + public:
1.220 + OwnedAtomDefnMapPtr lexdeps; /* unresolved lexical name dependencies */
1.221 +
1.222 + FuncStmtSet *funcStmts; /* Set of (non-top-level) function statements
1.223 + that will alias any top-level bindings with
1.224 + the same name. */
1.225 +
1.226 + // All inner functions in this context. Only filled in when parsing syntax.
1.227 + AutoFunctionVector innerFunctions;
1.228 +
1.229 + // In a function context, points to a Directive struct that can be updated
1.230 + // to reflect new directives encountered in the Directive Prologue that
1.231 + // require reparsing the function. In global/module/generator-tail contexts,
1.232 + // we don't need to reparse when encountering a DirectivePrologue so this
1.233 + // pointer may be nullptr.
1.234 + Directives *newDirectives;
1.235 +
1.236 + // Set when parsing a declaration-like destructuring pattern. This flag
1.237 + // causes PrimaryExpr to create PN_NAME parse nodes for variable references
1.238 + // which are not hooked into any definition's use chain, added to any tree
1.239 + // context's AtomList, etc. etc. CheckDestructuring will do that work
1.240 + // later.
1.241 + //
1.242 + // The comments atop CheckDestructuring explain the distinction between
1.243 + // assignment-like and declaration-like destructuring patterns, and why
1.244 + // they need to be treated differently.
1.245 + bool inDeclDestructuring:1;
1.246 +
1.247 + ParseContext(Parser<ParseHandler> *prs, GenericParseContext *parent,
1.248 + Node maybeFunction, SharedContext *sc,
1.249 + Directives *newDirectives,
1.250 + unsigned staticLevel, uint32_t bodyid, uint32_t blockScopeDepth)
1.251 + : GenericParseContext(parent, sc),
1.252 + bodyid(0), // initialized in init()
1.253 + blockidGen(bodyid), // used to set |bodyid| and subsequently incremented in init()
1.254 + topStmt(nullptr),
1.255 + topScopeStmt(nullptr),
1.256 + staticScope(prs->context),
1.257 + maybeFunction(maybeFunction),
1.258 + staticLevel(staticLevel),
1.259 + lastYieldOffset(NoYieldOffset),
1.260 + blockScopeDepth(blockScopeDepth),
1.261 + blockNode(ParseHandler::null()),
1.262 + decls_(prs->context, prs->alloc),
1.263 + args_(prs->context),
1.264 + vars_(prs->context),
1.265 + parserPC(&prs->pc),
1.266 + oldpc(prs->pc),
1.267 + lexdeps(prs->context),
1.268 + funcStmts(nullptr),
1.269 + innerFunctions(prs->context),
1.270 + newDirectives(newDirectives),
1.271 + inDeclDestructuring(false)
1.272 + {
1.273 + prs->pc = this;
1.274 + }
1.275 +
1.276 + ~ParseContext();
1.277 +
1.278 + bool init(TokenStream &ts);
1.279 +
1.280 + unsigned blockid() { return topStmt ? topStmt->blockid : bodyid; }
1.281 +
1.282 + // True if we are at the topmost level of a entire script or function body.
1.283 + // For example, while parsing this code we would encounter f1 and f2 at
1.284 + // body level, but we would not encounter f3 or f4 at body level:
1.285 + //
1.286 + // function f1() { function f2() { } }
1.287 + // if (cond) { function f3() { if (cond) { function f4() { } } } }
1.288 + //
1.289 + bool atBodyLevel() { return !topStmt; }
1.290 +
1.291 + // True if this is the ParseContext for the body of a function created by
1.292 + // the Function constructor.
1.293 + bool isFunctionConstructorBody() const {
1.294 + return sc->isFunctionBox() && staticLevel == 0;
1.295 + }
1.296 +
1.297 + inline bool useAsmOrInsideUseAsm() const {
1.298 + return sc->isFunctionBox() && sc->asFunctionBox()->useAsmOrInsideUseAsm();
1.299 + }
1.300 +};
1.301 +
1.302 +template <typename ParseHandler>
1.303 +inline
1.304 +Directives::Directives(ParseContext<ParseHandler> *parent)
1.305 + : strict_(parent->sc->strict),
1.306 + asmJS_(parent->useAsmOrInsideUseAsm())
1.307 +{}
1.308 +
1.309 +template <typename ParseHandler>
1.310 +struct BindData;
1.311 +
1.312 +class CompExprTransplanter;
1.313 +
1.314 +enum LetContext { LetExpresion, LetStatement };
1.315 +enum VarContext { HoistVars, DontHoistVars };
1.316 +enum FunctionType { Getter, Setter, Normal };
1.317 +
1.318 +template <typename ParseHandler>
1.319 +class Parser : private AutoGCRooter, public StrictModeGetter
1.320 +{
1.321 + public:
1.322 + ExclusiveContext *const context;
1.323 + LifoAlloc &alloc;
1.324 +
1.325 + TokenStream tokenStream;
1.326 + LifoAlloc::Mark tempPoolMark;
1.327 +
1.328 + /* list of parsed objects for GC tracing */
1.329 + ObjectBox *traceListHead;
1.330 +
1.331 + /* innermost parse context (stack-allocated) */
1.332 + ParseContext<ParseHandler> *pc;
1.333 +
1.334 + /* Compression token for aborting. */
1.335 + SourceCompressionTask *sct;
1.336 +
1.337 + ScriptSource *ss;
1.338 +
1.339 + /* Root atoms and objects allocated for the parsed tree. */
1.340 + AutoKeepAtoms keepAtoms;
1.341 +
1.342 + /* Perform constant-folding; must be true when interfacing with the emitter. */
1.343 + const bool foldConstants:1;
1.344 +
1.345 + private:
1.346 + /*
1.347 + * Not all language constructs can be handled during syntax parsing. If it
1.348 + * is not known whether the parse succeeds or fails, this bit is set and
1.349 + * the parse will return false.
1.350 + */
1.351 + bool abortedSyntaxParse:1;
1.352 +
1.353 + /* Unexpected end of input, i.e. TOK_EOF not at top-level. */
1.354 + bool isUnexpectedEOF_:1;
1.355 +
1.356 + typedef typename ParseHandler::Node Node;
1.357 + typedef typename ParseHandler::DefinitionNode DefinitionNode;
1.358 +
1.359 + public:
1.360 + /* State specific to the kind of parse being performed. */
1.361 + ParseHandler handler;
1.362 +
1.363 + private:
1.364 + bool reportHelper(ParseReportKind kind, bool strict, uint32_t offset,
1.365 + unsigned errorNumber, va_list args);
1.366 + public:
1.367 + bool report(ParseReportKind kind, bool strict, Node pn, unsigned errorNumber, ...);
1.368 + bool reportNoOffset(ParseReportKind kind, bool strict, unsigned errorNumber, ...);
1.369 + bool reportWithOffset(ParseReportKind kind, bool strict, uint32_t offset, unsigned errorNumber,
1.370 + ...);
1.371 +
1.372 + Parser(ExclusiveContext *cx, LifoAlloc *alloc, const ReadOnlyCompileOptions &options,
1.373 + const jschar *chars, size_t length, bool foldConstants,
1.374 + Parser<SyntaxParseHandler> *syntaxParser,
1.375 + LazyScript *lazyOuterFunction);
1.376 + ~Parser();
1.377 +
1.378 + // A Parser::Mark is the extension of the LifoAlloc::Mark to the entire
1.379 + // Parser's state. Note: clients must still take care that any ParseContext
1.380 + // that points into released ParseNodes is destroyed.
1.381 + class Mark
1.382 + {
1.383 + friend class Parser;
1.384 + LifoAlloc::Mark mark;
1.385 + ObjectBox *traceListHead;
1.386 + };
1.387 + Mark mark() const {
1.388 + Mark m;
1.389 + m.mark = alloc.mark();
1.390 + m.traceListHead = traceListHead;
1.391 + return m;
1.392 + }
1.393 + void release(Mark m) {
1.394 + alloc.release(m.mark);
1.395 + traceListHead = m.traceListHead;
1.396 + }
1.397 +
1.398 + friend void js::frontend::MarkParser(JSTracer *trc, AutoGCRooter *parser);
1.399 +
1.400 + const char *getFilename() const { return tokenStream.getFilename(); }
1.401 + JSVersion versionNumber() const { return tokenStream.versionNumber(); }
1.402 +
1.403 + /*
1.404 + * Parse a top-level JS script.
1.405 + */
1.406 + Node parse(JSObject *chain);
1.407 +
1.408 + /*
1.409 + * Allocate a new parsed object or function container from
1.410 + * cx->tempLifoAlloc.
1.411 + */
1.412 + ObjectBox *newObjectBox(JSObject *obj);
1.413 + FunctionBox *newFunctionBox(Node fn, JSFunction *fun, ParseContext<ParseHandler> *pc,
1.414 + Directives directives, GeneratorKind generatorKind);
1.415 +
1.416 + /*
1.417 + * Create a new function object given parse context (pc) and a name (which
1.418 + * is optional if this is a function expression).
1.419 + */
1.420 + JSFunction *newFunction(GenericParseContext *pc, HandleAtom atom, FunctionSyntaxKind kind,
1.421 + JSObject *proto = nullptr);
1.422 +
1.423 + void trace(JSTracer *trc);
1.424 +
1.425 + bool hadAbortedSyntaxParse() {
1.426 + return abortedSyntaxParse;
1.427 + }
1.428 + void clearAbortedSyntaxParse() {
1.429 + abortedSyntaxParse = false;
1.430 + }
1.431 +
1.432 + bool isUnexpectedEOF() const { return isUnexpectedEOF_; }
1.433 +
1.434 + private:
1.435 + Parser *thisForCtor() { return this; }
1.436 +
1.437 + Node stringLiteral();
1.438 + inline Node newName(PropertyName *name);
1.439 +
1.440 + inline bool abortIfSyntaxParser();
1.441 +
1.442 + public:
1.443 +
1.444 + /* Public entry points for parsing. */
1.445 + Node statement(bool canHaveDirectives = false);
1.446 + bool maybeParseDirective(Node list, Node pn, bool *cont);
1.447 +
1.448 + // Parse a function, given only its body. Used for the Function and
1.449 + // Generator constructors.
1.450 + Node standaloneFunctionBody(HandleFunction fun, const AutoNameVector &formals,
1.451 + GeneratorKind generatorKind,
1.452 + Directives inheritedDirectives, Directives *newDirectives);
1.453 +
1.454 + // Parse a function, given only its arguments and body. Used for lazily
1.455 + // parsed functions.
1.456 + Node standaloneLazyFunction(HandleFunction fun, unsigned staticLevel, bool strict,
1.457 + GeneratorKind generatorKind);
1.458 +
1.459 + /*
1.460 + * Parse a function body. Pass StatementListBody if the body is a list of
1.461 + * statements; pass ExpressionBody if the body is a single expression.
1.462 + */
1.463 + enum FunctionBodyType { StatementListBody, ExpressionBody };
1.464 + Node functionBody(FunctionSyntaxKind kind, FunctionBodyType type);
1.465 +
1.466 + bool functionArgsAndBodyGeneric(Node pn, HandleFunction fun, FunctionType type,
1.467 + FunctionSyntaxKind kind, Directives *newDirectives);
1.468 +
1.469 + // Determine whether |yield| is a valid name in the current context, or
1.470 + // whether it's prohibited due to strictness, JS version, or occurrence
1.471 + // inside a star generator.
1.472 + bool checkYieldNameValidity();
1.473 +
1.474 + virtual bool strictMode() { return pc->sc->strict; }
1.475 +
1.476 + const ReadOnlyCompileOptions &options() const {
1.477 + return tokenStream.options();
1.478 + }
1.479 +
1.480 + private:
1.481 + /*
1.482 + * JS parsers, from lowest to highest precedence.
1.483 + *
1.484 + * Each parser must be called during the dynamic scope of a ParseContext
1.485 + * object, pointed to by this->pc.
1.486 + *
1.487 + * Each returns a parse node tree or null on error.
1.488 + *
1.489 + * Parsers whose name has a '1' suffix leave the TokenStream state
1.490 + * pointing to the token one past the end of the parsed fragment. For a
1.491 + * number of the parsers this is convenient and avoids a lot of
1.492 + * unnecessary ungetting and regetting of tokens.
1.493 + *
1.494 + * Some parsers have two versions: an always-inlined version (with an 'i'
1.495 + * suffix) and a never-inlined version (with an 'n' suffix).
1.496 + */
1.497 + Node functionStmt();
1.498 + Node functionExpr();
1.499 + Node statements();
1.500 +
1.501 + Node blockStatement();
1.502 + Node ifStatement();
1.503 + Node doWhileStatement();
1.504 + Node whileStatement();
1.505 + Node forStatement();
1.506 + Node switchStatement();
1.507 + Node continueStatement();
1.508 + Node breakStatement();
1.509 + Node returnStatement();
1.510 + Node withStatement();
1.511 + Node labeledStatement();
1.512 + Node throwStatement();
1.513 + Node tryStatement();
1.514 + Node debuggerStatement();
1.515 +
1.516 + Node letDeclaration();
1.517 + Node letStatement();
1.518 + Node importDeclaration();
1.519 + Node exportDeclaration();
1.520 + Node expressionStatement();
1.521 + Node variables(ParseNodeKind kind, bool *psimple = nullptr,
1.522 + StaticBlockObject *blockObj = nullptr,
1.523 + VarContext varContext = HoistVars);
1.524 + Node expr();
1.525 + Node assignExpr();
1.526 + Node assignExprWithoutYield(unsigned err);
1.527 + Node yieldExpression();
1.528 + Node condExpr1();
1.529 + Node orExpr1();
1.530 + Node unaryExpr();
1.531 + Node memberExpr(TokenKind tt, bool allowCallSyntax);
1.532 + Node primaryExpr(TokenKind tt);
1.533 + Node parenExprOrGeneratorComprehension();
1.534 + Node exprInParens();
1.535 +
1.536 + /*
1.537 + * Additional JS parsers.
1.538 + */
1.539 + bool functionArguments(FunctionSyntaxKind kind, Node *list, Node funcpn, bool *hasRest);
1.540 +
1.541 + Node functionDef(HandlePropertyName name, const TokenStream::Position &start,
1.542 + FunctionType type, FunctionSyntaxKind kind, GeneratorKind generatorKind);
1.543 + bool functionArgsAndBody(Node pn, HandleFunction fun,
1.544 + FunctionType type, FunctionSyntaxKind kind,
1.545 + GeneratorKind generatorKind,
1.546 + Directives inheritedDirectives, Directives *newDirectives);
1.547 +
1.548 + Node unaryOpExpr(ParseNodeKind kind, JSOp op, uint32_t begin);
1.549 +
1.550 + Node condition();
1.551 +
1.552 + Node generatorComprehensionLambda(GeneratorKind comprehensionKind, unsigned begin,
1.553 + Node innerStmt);
1.554 +
1.555 + Node legacyComprehensionTail(Node kid, unsigned blockid, GeneratorKind comprehensionKind,
1.556 + ParseContext<ParseHandler> *outerpc,
1.557 + unsigned innerBlockScopeDepth);
1.558 + Node legacyArrayComprehension(Node array);
1.559 + Node legacyGeneratorExpr(Node kid);
1.560 +
1.561 + Node comprehensionTail(GeneratorKind comprehensionKind);
1.562 + Node comprehensionIf(GeneratorKind comprehensionKind);
1.563 + Node comprehensionFor(GeneratorKind comprehensionKind);
1.564 + Node comprehension(GeneratorKind comprehensionKind);
1.565 + Node arrayComprehension(uint32_t begin);
1.566 + Node generatorComprehension(uint32_t begin);
1.567 +
1.568 + bool argumentList(Node listNode, bool *isSpread);
1.569 + Node letBlock(LetContext letContext);
1.570 + Node destructuringExpr(BindData<ParseHandler> *data, TokenKind tt);
1.571 +
1.572 + Node identifierName();
1.573 +
1.574 + bool matchLabel(MutableHandle<PropertyName*> label);
1.575 +
1.576 + bool allowsForEachIn() {
1.577 +#if !JS_HAS_FOR_EACH_IN
1.578 + return false;
1.579 +#else
1.580 + return versionNumber() >= JSVERSION_1_6;
1.581 +#endif
1.582 + }
1.583 +
1.584 + enum AssignmentFlavor {
1.585 + PlainAssignment,
1.586 + CompoundAssignment,
1.587 + KeyedDestructuringAssignment,
1.588 + IncDecAssignment
1.589 + };
1.590 +
1.591 + bool checkAndMarkAsAssignmentLhs(Node pn, AssignmentFlavor flavor);
1.592 + bool matchInOrOf(bool *isForOfp);
1.593 +
1.594 + bool checkFunctionArguments();
1.595 + bool makeDefIntoUse(Definition *dn, Node pn, JSAtom *atom);
1.596 + bool checkFunctionDefinition(HandlePropertyName funName, Node *pn, FunctionSyntaxKind kind,
1.597 + bool *pbodyProcessed);
1.598 + bool finishFunctionDefinition(Node pn, FunctionBox *funbox, Node prelude, Node body);
1.599 + bool addFreeVariablesFromLazyFunction(JSFunction *fun, ParseContext<ParseHandler> *pc);
1.600 +
1.601 + bool isValidForStatementLHS(Node pn1, JSVersion version, bool forDecl, bool forEach,
1.602 + ParseNodeKind headKind);
1.603 + bool checkAndMarkAsIncOperand(Node kid, TokenKind tt, bool preorder);
1.604 + bool checkStrictAssignment(Node lhs, AssignmentFlavor flavor);
1.605 + bool checkStrictBinding(PropertyName *name, Node pn);
1.606 + bool defineArg(Node funcpn, HandlePropertyName name,
1.607 + bool disallowDuplicateArgs = false, Node *duplicatedArg = nullptr);
1.608 + Node pushLexicalScope(StmtInfoPC *stmt);
1.609 + Node pushLexicalScope(Handle<StaticBlockObject*> blockObj, StmtInfoPC *stmt);
1.610 + Node pushLetScope(Handle<StaticBlockObject*> blockObj, StmtInfoPC *stmt);
1.611 + bool noteNameUse(HandlePropertyName name, Node pn);
1.612 + Node objectLiteral();
1.613 + Node arrayInitializer();
1.614 + Node newRegExp();
1.615 +
1.616 + Node newBindingNode(PropertyName *name, bool functionScope, VarContext varContext = HoistVars);
1.617 + bool checkDestructuring(BindData<ParseHandler> *data, Node left, bool toplevel = true);
1.618 + bool bindDestructuringVar(BindData<ParseHandler> *data, Node pn);
1.619 + bool bindDestructuringLHS(Node pn);
1.620 + bool makeSetCall(Node pn, unsigned msg);
1.621 + Node cloneLeftHandSide(Node opn);
1.622 + Node cloneParseTree(Node opn);
1.623 +
1.624 + Node newNumber(const Token &tok) {
1.625 + return handler.newNumber(tok.number(), tok.decimalPoint(), tok.pos);
1.626 + }
1.627 +
1.628 + static bool
1.629 + bindDestructuringArg(BindData<ParseHandler> *data,
1.630 + HandlePropertyName name, Parser<ParseHandler> *parser);
1.631 +
1.632 + static bool
1.633 + bindLet(BindData<ParseHandler> *data,
1.634 + HandlePropertyName name, Parser<ParseHandler> *parser);
1.635 +
1.636 + static bool
1.637 + bindVarOrConst(BindData<ParseHandler> *data,
1.638 + HandlePropertyName name, Parser<ParseHandler> *parser);
1.639 +
1.640 + static Node null() { return ParseHandler::null(); }
1.641 +
1.642 + bool reportRedeclaration(Node pn, bool isConst, JSAtom *atom);
1.643 + bool reportBadReturn(Node pn, ParseReportKind kind, unsigned errnum, unsigned anonerrnum);
1.644 + bool checkFinalReturn(Node pn);
1.645 + DefinitionNode getOrCreateLexicalDependency(ParseContext<ParseHandler> *pc, JSAtom *atom);
1.646 +
1.647 + bool leaveFunction(Node fn, ParseContext<ParseHandler> *outerpc,
1.648 + FunctionSyntaxKind kind = Expression);
1.649 +
1.650 + TokenPos pos() const { return tokenStream.currentToken().pos; }
1.651 +
1.652 + bool asmJS(Node list);
1.653 +
1.654 + friend class LegacyCompExprTransplanter;
1.655 + friend struct BindData<ParseHandler>;
1.656 +};
1.657 +
1.658 +/* Declare some required template specializations. */
1.659 +
1.660 +template <>
1.661 +bool
1.662 +Parser<FullParseHandler>::checkAndMarkAsAssignmentLhs(ParseNode *pn, AssignmentFlavor flavor);
1.663 +
1.664 +template <>
1.665 +bool
1.666 +Parser<SyntaxParseHandler>::checkAndMarkAsAssignmentLhs(Node pn, AssignmentFlavor flavor);
1.667 +
1.668 +} /* namespace frontend */
1.669 +} /* namespace js */
1.670 +
1.671 +/*
1.672 + * Convenience macro to access Parser.tokenStream as a pointer.
1.673 + */
1.674 +#define TS(p) (&(p)->tokenStream)
1.675 +
1.676 +#endif /* frontend_Parser_h */
