diff options
Diffstat (limited to 'js/src/frontend/BytecodeEmitter.h')
| -rw-r--r-- | js/src/frontend/BytecodeEmitter.h | 396 |
1 files changed, 198 insertions, 198 deletions
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h index 9ca4856cf5..aef575b1cd 100644 --- a/js/src/frontend/BytecodeEmitter.h +++ b/js/src/frontend/BytecodeEmitter.h @@ -40,7 +40,7 @@ class CGConstList { explicit CGConstList(ExclusiveContext* cx) : vector(cx, ValueVector(cx)) { } - MOZ_MUST_USE bool append(const Value& v) { + [[nodiscard]] bool append(const Value& v) { return vector.append(v); } size_t length() const { return vector.length(); } @@ -75,7 +75,7 @@ struct CGTryNoteList { Vector<JSTryNote> list; explicit CGTryNoteList(ExclusiveContext* cx) : list(cx) {} - MOZ_MUST_USE bool append(JSTryNoteKind kind, uint32_t stackDepth, size_t start, size_t end); + [[nodiscard]] bool append(JSTryNoteKind kind, uint32_t stackDepth, size_t start, size_t end); size_t length() const { return list.length(); } void finish(TryNoteArray* array); }; @@ -97,7 +97,7 @@ struct CGScopeNoteList { Vector<CGScopeNote> list; explicit CGScopeNoteList(ExclusiveContext* cx) : list(cx) {} - MOZ_MUST_USE bool append(uint32_t scopeIndex, uint32_t offset, bool inPrologue, + [[nodiscard]] bool append(uint32_t scopeIndex, uint32_t offset, bool inPrologue, uint32_t parent); void recordEnd(uint32_t index, uint32_t offset, bool inPrologue); size_t length() const { return list.length(); } @@ -110,7 +110,7 @@ struct CGYieldAndAwaitOffsetList { uint32_t numAwaits; explicit CGYieldAndAwaitOffsetList(ExclusiveContext* cx) : list(cx), numYields(0), numAwaits(0) {} - MOZ_MUST_USE bool append(uint32_t offset) { return list.append(offset); } + [[nodiscard]] bool append(uint32_t offset) { return list.append(offset); } size_t length() const { return list.length(); } void finish(YieldAndAwaitOffsetArray& array, uint32_t prologueLength); }; @@ -264,7 +264,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter TokenPos bodyPosition, EmitterMode emitterMode = Normal, FieldInitializers fieldInitializers = FieldInitializers::Invalid()); - MOZ_MUST_USE bool init(); + [[nodiscard]] bool init(); template <typename T> T* findInnermostNestableControl() const; @@ -299,8 +299,8 @@ struct MOZ_STACK_CLASS BytecodeEmitter Scope* outermostScope() const { return scopeList.vector[0]; } Scope* innermostScope() const; - MOZ_ALWAYS_INLINE - MOZ_MUST_USE bool makeAtomIndex(JSAtom* atom, uint32_t* indexp) { + [[nodiscard]] MOZ_ALWAYS_INLINE + bool makeAtomIndex(JSAtom* atom, uint32_t* indexp) { MOZ_ASSERT(atomIndices); AtomIndexMap::AddPtr p = atomIndices->lookupForAdd(atom); if (p) { @@ -317,16 +317,16 @@ struct MOZ_STACK_CLASS BytecodeEmitter } bool isInLoop(); - MOZ_MUST_USE bool checkSingletonContext(); + [[nodiscard]] bool checkSingletonContext(); // Check whether our function is in a run-once context (a toplevel // run-one script or a run-once lambda). - MOZ_MUST_USE bool checkRunOnceContext(); + [[nodiscard]] bool checkRunOnceContext(); bool needsImplicitThis(); - MOZ_MUST_USE bool maybeSetDisplayURL(); - MOZ_MUST_USE bool maybeSetSourceMap(); + [[nodiscard]] bool maybeSetDisplayURL(); + [[nodiscard]] bool maybeSetSourceMap(); void tellDebuggerAboutCompiledScript(ExclusiveContext* cx); inline TokenStream& tokenStream(); @@ -383,29 +383,29 @@ struct MOZ_STACK_CLASS BytecodeEmitter // statement, we define useless code as code with no side effects, because // the main effect, the value left on the stack after the code executes, // will be discarded by a pop bytecode. - MOZ_MUST_USE bool checkSideEffects(ParseNode* pn, bool* answer); + [[nodiscard]] bool checkSideEffects(ParseNode* pn, bool* answer); #ifdef DEBUG - MOZ_MUST_USE bool checkStrictOrSloppy(JSOp op); + [[nodiscard]] bool checkStrictOrSloppy(JSOp op); #endif // Append a new source note of the given type (and therefore size) to the // notes dynamic array, updating noteCount. Return the new note's index // within the array pointed at by current->notes as outparam. - MOZ_MUST_USE bool newSrcNote(SrcNoteType type, unsigned* indexp = nullptr); - MOZ_MUST_USE bool newSrcNote2(SrcNoteType type, ptrdiff_t offset, unsigned* indexp = nullptr); - MOZ_MUST_USE bool newSrcNote3(SrcNoteType type, ptrdiff_t offset1, ptrdiff_t offset2, + [[nodiscard]] bool newSrcNote(SrcNoteType type, unsigned* indexp = nullptr); + [[nodiscard]] bool newSrcNote2(SrcNoteType type, ptrdiff_t offset, unsigned* indexp = nullptr); + [[nodiscard]] bool newSrcNote3(SrcNoteType type, ptrdiff_t offset1, ptrdiff_t offset2, unsigned* indexp = nullptr); void copySrcNotes(jssrcnote* destination, uint32_t nsrcnotes); - MOZ_MUST_USE bool setSrcNoteOffset(unsigned index, unsigned which, ptrdiff_t offset); + [[nodiscard]] bool setSrcNoteOffset(unsigned index, unsigned which, ptrdiff_t offset); // NB: this function can add at most one extra extended delta note. - MOZ_MUST_USE bool addToSrcNoteDelta(jssrcnote* sn, ptrdiff_t delta); + [[nodiscard]] bool addToSrcNoteDelta(jssrcnote* sn, ptrdiff_t delta); // Finish taking source notes in cx's notePool. If successful, the final // source note count is stored in the out outparam. - MOZ_MUST_USE bool finishTakingSrcNotes(uint32_t* out); + [[nodiscard]] bool finishTakingSrcNotes(uint32_t* out); // Control whether emitTree emits a line number note. enum EmitLineNumberNote { @@ -414,242 +414,242 @@ struct MOZ_STACK_CLASS BytecodeEmitter }; // Emit code for the tree rooted at pn. - MOZ_MUST_USE bool emitTree(ParseNode* pn, ValueUsage valueUsage = ValueUsage::WantValue, + [[nodiscard]] bool emitTree(ParseNode* pn, ValueUsage valueUsage = ValueUsage::WantValue, EmitLineNumberNote emitLineNote = EMIT_LINENOTE); // Emit code for the optional tree rooted at pn. - MOZ_MUST_USE bool emitOptionalTree(ParseNode* pn, + [[nodiscard]] bool emitOptionalTree(ParseNode* pn, OptionalEmitter& oe, ValueUsage valueUsage = ValueUsage::WantValue); // Emit code for the tree rooted at pn with its own TDZ cache. - MOZ_MUST_USE bool emitTreeInBranch(ParseNode* pn, + [[nodiscard]] bool emitTreeInBranch(ParseNode* pn, ValueUsage valueUsage = ValueUsage::WantValue); // Emit global, eval, or module code for tree rooted at body. Always // encompasses the entire source. - MOZ_MUST_USE bool emitScript(ParseNode* body); + [[nodiscard]] bool emitScript(ParseNode* body); // Emit function code for the tree rooted at body. - MOZ_MUST_USE bool emitFunctionScript(FunctionNode* funNode); + [[nodiscard]] bool emitFunctionScript(FunctionNode* funNode); void updateDepth(ptrdiff_t target); - MOZ_MUST_USE bool updateLineNumberNotes(uint32_t offset); - MOZ_MUST_USE bool updateSourceCoordNotes(uint32_t offset); + [[nodiscard]] bool updateLineNumberNotes(uint32_t offset); + [[nodiscard]] bool updateSourceCoordNotes(uint32_t offset); JSOp strictifySetNameOp(JSOp op); - MOZ_MUST_USE bool emitCheck(JSOp op, ptrdiff_t delta, ptrdiff_t* offset); + [[nodiscard]] bool emitCheck(JSOp op, ptrdiff_t delta, ptrdiff_t* offset); // Emit one bytecode. - MOZ_MUST_USE bool emit1(JSOp op); + [[nodiscard]] bool emit1(JSOp op); // Emit two bytecodes, an opcode (op) with a byte of immediate operand // (op1). - MOZ_MUST_USE bool emit2(JSOp op, uint8_t op1); + [[nodiscard]] bool emit2(JSOp op, uint8_t op1); // Emit three bytecodes, an opcode with two bytes of immediate operands. - MOZ_MUST_USE bool emit3(JSOp op, jsbytecode op1, jsbytecode op2); + [[nodiscard]] bool emit3(JSOp op, jsbytecode op1, jsbytecode op2); // Helper to emit JSOP_DUPAT. The argument is the value's depth on the // JS stack, as measured from the top. - MOZ_MUST_USE bool emitDupAt(unsigned slotFromTop); + [[nodiscard]] bool emitDupAt(unsigned slotFromTop); // Helper to emit JSOP_POP or JSOP_POPN. - MOZ_MUST_USE bool emitPopN(unsigned n); + [[nodiscard]] bool emitPopN(unsigned n); // Helper to emit JSOP_SWAP or JSOP_UNPICK. - MOZ_MUST_USE bool emitUnpickN(unsigned n); + [[nodiscard]] bool emitUnpickN(unsigned n); // Helper to emit JSOP_CHECKISOBJ. - MOZ_MUST_USE bool emitCheckIsObj(CheckIsObjectKind kind); + [[nodiscard]] bool emitCheckIsObj(CheckIsObjectKind kind); // Helper to emit JSOP_CHECKISCALLABLE. - MOZ_MUST_USE bool emitCheckIsCallable(CheckIsCallableKind kind); + [[nodiscard]] bool emitCheckIsCallable(CheckIsCallableKind kind); // Emit a bytecode followed by an uint16 immediate operand stored in // big-endian order. - MOZ_MUST_USE bool emitUint16Operand(JSOp op, uint32_t operand); + [[nodiscard]] bool emitUint16Operand(JSOp op, uint32_t operand); // Emit a bytecode followed by an uint32 immediate operand. - MOZ_MUST_USE bool emitUint32Operand(JSOp op, uint32_t operand); + [[nodiscard]] bool emitUint32Operand(JSOp op, uint32_t operand); // Emit (1 + extra) bytecodes, for N bytes of op and its immediate operand. - MOZ_MUST_USE bool emitN(JSOp op, size_t extra, ptrdiff_t* offset = nullptr); + [[nodiscard]] bool emitN(JSOp op, size_t extra, ptrdiff_t* offset = nullptr); - MOZ_MUST_USE bool emitNumberOp(double dval); + [[nodiscard]] bool emitNumberOp(double dval); - MOZ_MUST_USE bool emitBigIntOp(BigInt* bigint); + [[nodiscard]] bool emitBigIntOp(BigInt* bigint); - MOZ_MUST_USE bool emitThisLiteral(ThisLiteral* pn); - MOZ_MUST_USE bool emitGetFunctionThis(ParseNode* pn); - MOZ_MUST_USE bool emitGetFunctionThis(const mozilla::Maybe<uint32_t>& offset); - MOZ_MUST_USE bool emitGetThisForSuperBase(UnaryNode* superBase); - MOZ_MUST_USE bool emitSetThis(BinaryNode* setThisNode); - MOZ_MUST_USE bool emitCheckDerivedClassConstructorReturn(); + [[nodiscard]] bool emitThisLiteral(ThisLiteral* pn); + [[nodiscard]] bool emitGetFunctionThis(ParseNode* pn); + [[nodiscard]] bool emitGetFunctionThis(const mozilla::Maybe<uint32_t>& offset); + [[nodiscard]] bool emitGetThisForSuperBase(UnaryNode* superBase); + [[nodiscard]] bool emitSetThis(BinaryNode* setThisNode); + [[nodiscard]] bool emitCheckDerivedClassConstructorReturn(); // Handle jump opcodes and jump targets. - MOZ_MUST_USE bool emitJumpTarget(JumpTarget* target); - MOZ_MUST_USE bool emitJumpNoFallthrough(JSOp op, JumpList* jump); - MOZ_MUST_USE bool emitJump(JSOp op, JumpList* jump); - MOZ_MUST_USE bool emitBackwardJump(JSOp op, JumpTarget target, JumpList* jump, + [[nodiscard]] bool emitJumpTarget(JumpTarget* target); + [[nodiscard]] bool emitJumpNoFallthrough(JSOp op, JumpList* jump); + [[nodiscard]] bool emitJump(JSOp op, JumpList* jump); + [[nodiscard]] bool emitBackwardJump(JSOp op, JumpTarget target, JumpList* jump, JumpTarget* fallthrough); void patchJumpsToTarget(JumpList jump, JumpTarget target); - MOZ_MUST_USE bool emitJumpTargetAndPatch(JumpList jump); + [[nodiscard]] bool emitJumpTargetAndPatch(JumpList jump); - MOZ_MUST_USE bool emitCall(JSOp op, uint16_t argc, + [[nodiscard]] bool emitCall(JSOp op, uint16_t argc, const mozilla::Maybe<uint32_t>& sourceCoordOffset); - MOZ_MUST_USE bool emitCall(JSOp op, uint16_t argc, ParseNode* pn = nullptr); - MOZ_MUST_USE bool emitCallIncDec(UnaryNode* incDec); + [[nodiscard]] bool emitCall(JSOp op, uint16_t argc, ParseNode* pn = nullptr); + [[nodiscard]] bool emitCallIncDec(UnaryNode* incDec); - MOZ_MUST_USE bool emitLoopHead(ParseNode* nextpn, JumpTarget* top); - MOZ_MUST_USE bool emitLoopEntry(ParseNode* nextpn, JumpList entryJump); + [[nodiscard]] bool emitLoopHead(ParseNode* nextpn, JumpTarget* top); + [[nodiscard]] bool emitLoopEntry(ParseNode* nextpn, JumpList entryJump); - MOZ_MUST_USE bool emitGoto(NestableControl* target, JumpList* jumplist, + [[nodiscard]] bool emitGoto(NestableControl* target, JumpList* jumplist, SrcNoteType noteType = SRC_NULL); - MOZ_MUST_USE bool emitIndex32(JSOp op, uint32_t index); - MOZ_MUST_USE bool emitIndexOp(JSOp op, uint32_t index); + [[nodiscard]] bool emitIndex32(JSOp op, uint32_t index); + [[nodiscard]] bool emitIndexOp(JSOp op, uint32_t index); - MOZ_MUST_USE bool emitAtomOp(JSAtom* atom, JSOp op); - MOZ_MUST_USE bool emitAtomOp(uint32_t atomIndex, JSOp op); + [[nodiscard]] bool emitAtomOp(JSAtom* atom, JSOp op); + [[nodiscard]] bool emitAtomOp(uint32_t atomIndex, JSOp op); - MOZ_MUST_USE bool emitArrayLiteral(ListNode* array); - MOZ_MUST_USE bool emitArray(ParseNode* arrayHead, uint32_t count, JSOp op); - MOZ_MUST_USE bool emitArrayComp(ListNode* pn); + [[nodiscard]] bool emitArrayLiteral(ListNode* array); + [[nodiscard]] bool emitArray(ParseNode* arrayHead, uint32_t count, JSOp op); + [[nodiscard]] bool emitArrayComp(ListNode* pn); - MOZ_MUST_USE bool emitInternedScopeOp(uint32_t index, JSOp op); - MOZ_MUST_USE bool emitInternedObjectOp(uint32_t index, JSOp op); - MOZ_MUST_USE bool emitObjectOp(ObjectBox* objbox, JSOp op); - MOZ_MUST_USE bool emitObjectPairOp(ObjectBox* objbox1, ObjectBox* objbox2, JSOp op); - MOZ_MUST_USE bool emitRegExp(uint32_t index); + [[nodiscard]] bool emitInternedScopeOp(uint32_t index, JSOp op); + [[nodiscard]] bool emitInternedObjectOp(uint32_t index, JSOp op); + [[nodiscard]] bool emitObjectOp(ObjectBox* objbox, JSOp op); + [[nodiscard]] bool emitObjectPairOp(ObjectBox* objbox1, ObjectBox* objbox2, JSOp op); + [[nodiscard]] bool emitRegExp(uint32_t index); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitFunction(FunctionNode* funNode, + [[nodiscard]] MOZ_NEVER_INLINE bool emitFunction(FunctionNode* funNode, bool needsProto = false, ListNode* classContentsIfConstructor = nullptr); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitObject(ListNode* objNode); + [[nodiscard]] MOZ_NEVER_INLINE bool emitObject(ListNode* objNode); - MOZ_MUST_USE bool replaceNewInitWithNewObject(JSObject* obj, ptrdiff_t offset); + [[nodiscard]] bool replaceNewInitWithNewObject(JSObject* obj, ptrdiff_t offset); - MOZ_MUST_USE bool emitHoistedFunctionsInList(ListNode* stmtList); + [[nodiscard]] bool emitHoistedFunctionsInList(ListNode* stmtList); - MOZ_MUST_USE bool emitPropertyList(ListNode* obj, PropertyEmitter& pe, + [[nodiscard]] bool emitPropertyList(ListNode* obj, PropertyEmitter& pe, PropListType type); enum class FieldPlacement { Instance, Static }; FieldInitializers setupFieldInitializers(ListNode* classMembers, FieldPlacement placement); - MOZ_MUST_USE bool emitCreateFieldKeys(ListNode* obj, FieldPlacement placement); - MOZ_MUST_USE bool emitCreateFieldInitializers(ClassEmitter& ce, ListNode* obj, FieldPlacement placement); + [[nodiscard]] bool emitCreateFieldKeys(ListNode* obj, FieldPlacement placement); + [[nodiscard]] bool emitCreateFieldInitializers(ClassEmitter& ce, ListNode* obj, FieldPlacement placement); const FieldInitializers& findFieldInitializersForCall(); - MOZ_MUST_USE bool emitInitializeInstanceFields(); - MOZ_MUST_USE bool emitInitializeStaticFields(ListNode* classMembers); + [[nodiscard]] bool emitInitializeInstanceFields(); + [[nodiscard]] bool emitInitializeStaticFields(ListNode* classMembers); // To catch accidental misuse, emitUint16Operand/emit3 assert that they are // not used to unconditionally emit JSOP_GETLOCAL. Variable access should // instead be emitted using EmitVarOp. In special cases, when the caller // definitely knows that a given local slot is unaliased, this function may be // used as a non-asserting version of emitUint16Operand. - MOZ_MUST_USE bool emitLocalOp(JSOp op, uint32_t slot); + [[nodiscard]] bool emitLocalOp(JSOp op, uint32_t slot); - MOZ_MUST_USE bool emitArgOp(JSOp op, uint16_t slot); - MOZ_MUST_USE bool emitEnvCoordOp(JSOp op, EnvironmentCoordinate ec); + [[nodiscard]] bool emitArgOp(JSOp op, uint16_t slot); + [[nodiscard]] bool emitEnvCoordOp(JSOp op, EnvironmentCoordinate ec); - MOZ_MUST_USE bool emitGetNameAtLocation(JSAtom* name, const NameLocation& loc); - MOZ_MUST_USE bool emitGetName(JSAtom* name) { + [[nodiscard]] bool emitGetNameAtLocation(JSAtom* name, const NameLocation& loc); + [[nodiscard]] bool emitGetName(JSAtom* name) { return emitGetNameAtLocation(name, lookupName(name)); } - MOZ_MUST_USE bool emitGetName(ParseNode* pn); + [[nodiscard]] bool emitGetName(ParseNode* pn); - MOZ_MUST_USE bool emitTDZCheckIfNeeded(JSAtom* name, const NameLocation& loc); + [[nodiscard]] bool emitTDZCheckIfNeeded(JSAtom* name, const NameLocation& loc); - MOZ_MUST_USE bool emitNameIncDec(UnaryNode* incDec); + [[nodiscard]] bool emitNameIncDec(UnaryNode* incDec); - MOZ_MUST_USE bool emitDeclarationList(ListNode* declList); - MOZ_MUST_USE bool emitSingleDeclaration(ParseNode* declList, ParseNode* decl, + [[nodiscard]] bool emitDeclarationList(ListNode* declList); + [[nodiscard]] bool emitSingleDeclaration(ParseNode* declList, ParseNode* decl, ParseNode* initializer); - MOZ_MUST_USE bool emitNewInit(JSProtoKey key); - MOZ_MUST_USE bool emitSingletonInitialiser(ParseNode* pn); + [[nodiscard]] bool emitNewInit(JSProtoKey key); + [[nodiscard]] bool emitSingletonInitialiser(ParseNode* pn); - MOZ_MUST_USE bool emitPrepareIteratorResult(); - MOZ_MUST_USE bool emitFinishIteratorResult(bool done); - MOZ_MUST_USE bool iteratorResultShape(unsigned* shape); - MOZ_MUST_USE bool emitToIteratorResult(bool done); + [[nodiscard]] bool emitPrepareIteratorResult(); + [[nodiscard]] bool emitFinishIteratorResult(bool done); + [[nodiscard]] bool iteratorResultShape(unsigned* shape); + [[nodiscard]] bool emitToIteratorResult(bool done); - MOZ_MUST_USE bool emitGetDotGeneratorInInnermostScope() { + [[nodiscard]] bool emitGetDotGeneratorInInnermostScope() { return emitGetDotGeneratorInScope(*innermostEmitterScope()); } - MOZ_MUST_USE bool emitGetDotGeneratorInScope(EmitterScope& currentScope); + [[nodiscard]] bool emitGetDotGeneratorInScope(EmitterScope& currentScope); - MOZ_MUST_USE bool emitInitialYield(UnaryNode* yieldNode); - MOZ_MUST_USE bool emitYield(UnaryNode* yieldNode); - MOZ_MUST_USE bool emitYieldOp(JSOp op); - MOZ_MUST_USE bool emitYieldStar(ParseNode* iter); - MOZ_MUST_USE bool emitAwaitInInnermostScope() { + [[nodiscard]] bool emitInitialYield(UnaryNode* yieldNode); + [[nodiscard]] bool emitYield(UnaryNode* yieldNode); + [[nodiscard]] bool emitYieldOp(JSOp op); + [[nodiscard]] bool emitYieldStar(ParseNode* iter); + [[nodiscard]] bool emitAwaitInInnermostScope() { return emitAwaitInScope(*innermostEmitterScope()); } - MOZ_MUST_USE bool emitAwaitInInnermostScope(UnaryNode* awaitNode); - MOZ_MUST_USE bool emitAwaitInScope(EmitterScope& currentScope); - MOZ_MUST_USE bool emitPropLHS(PropertyAccess* prop); - MOZ_MUST_USE bool emitPropIncDec(UnaryNode* incDec); + [[nodiscard]] bool emitAwaitInInnermostScope(UnaryNode* awaitNode); + [[nodiscard]] bool emitAwaitInScope(EmitterScope& currentScope); + [[nodiscard]] bool emitPropLHS(PropertyAccess* prop); + [[nodiscard]] bool emitPropIncDec(UnaryNode* incDec); - MOZ_MUST_USE bool emitAsyncWrapperLambda(unsigned index, bool isArrow); - MOZ_MUST_USE bool emitAsyncWrapper(unsigned index, bool needsHomeObject, bool isArrow, + [[nodiscard]] bool emitAsyncWrapperLambda(unsigned index, bool isArrow); + [[nodiscard]] bool emitAsyncWrapper(unsigned index, bool needsHomeObject, bool isArrow, bool isStarGenerator); - MOZ_MUST_USE bool emitComputedPropertyName(UnaryNode* computedPropName); + [[nodiscard]] bool emitComputedPropertyName(UnaryNode* computedPropName); // Emit bytecode to put operands for a JSOP_GETELEM/CALLELEM/SETELEM/DELELEM // opcode onto the stack in the right order. In the case of SETELEM, the // value to be assigned must already be pushed. enum class EmitElemOption { Get, Set, Call, IncDec, CompoundAssign, Ref }; - MOZ_MUST_USE bool emitElemOperands(PropertyByValue* elem, EmitElemOption opts); + [[nodiscard]] bool emitElemOperands(PropertyByValue* elem, EmitElemOption opts); - MOZ_MUST_USE bool emitElemObjAndKey(PropertyByValue* elem, bool isSuper, ElemOpEmitter& eoe); - MOZ_MUST_USE bool emitElemOpBase(JSOp op); - MOZ_MUST_USE bool emitElemIncDec(UnaryNode* incDec); + [[nodiscard]] bool emitElemObjAndKey(PropertyByValue* elem, bool isSuper, ElemOpEmitter& eoe); + [[nodiscard]] bool emitElemOpBase(JSOp op); + [[nodiscard]] bool emitElemIncDec(UnaryNode* incDec); - MOZ_MUST_USE bool emitCatch(TernaryNode* catchNode); - MOZ_MUST_USE bool emitIf(TernaryNode* ifNode); - MOZ_MUST_USE bool emitWith(BinaryNode* withNode); + [[nodiscard]] bool emitCatch(TernaryNode* catchNode); + [[nodiscard]] bool emitIf(TernaryNode* ifNode); + [[nodiscard]] bool emitWith(BinaryNode* withNode); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitLabeledStatement(const LabeledStatement* pn); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitLexicalScope(LexicalScopeNode* lexicalScope); - MOZ_MUST_USE bool emitLexicalScopeBody(ParseNode* body, + [[nodiscard]] MOZ_NEVER_INLINE bool emitLabeledStatement(const LabeledStatement* pn); + [[nodiscard]] MOZ_NEVER_INLINE bool emitLexicalScope(LexicalScopeNode* lexicalScope); + [[nodiscard]] bool emitLexicalScopeBody(ParseNode* body, EmitLineNumberNote emitLineNote = EMIT_LINENOTE); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitSwitch(SwitchStatement* switchStmt); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitTry(TryNode* tryNode); + [[nodiscard]] MOZ_NEVER_INLINE bool emitSwitch(SwitchStatement* switchStmt); + [[nodiscard]] MOZ_NEVER_INLINE bool emitTry(TryNode* tryNode); // emitDestructuringLHSRef emits the lhs expression's reference. // If the lhs expression is object property |OBJ.prop|, it emits |OBJ|. // If it's object element |OBJ[ELEM]|, it emits |OBJ| and |ELEM|. // If there's nothing to evaluate for the reference, it emits nothing. // |emitted| parameter receives the number of values pushed onto the stack. - MOZ_MUST_USE bool emitDestructuringLHSRef(ParseNode* target, size_t* emitted); + [[nodiscard]] bool emitDestructuringLHSRef(ParseNode* target, size_t* emitted); // emitSetOrInitializeDestructuring assumes the lhs expression's reference // and the to-be-destructured value has been pushed on the stack. It emits // code to destructure a single lhs expression (either a name or a compound // []/{} expression). - MOZ_MUST_USE bool emitSetOrInitializeDestructuring(ParseNode* target, DestructuringFlavor flav); + [[nodiscard]] bool emitSetOrInitializeDestructuring(ParseNode* target, DestructuringFlavor flav); // emitDestructuringObjRestExclusionSet emits the property exclusion set // for the rest-property in an object pattern. - MOZ_MUST_USE bool emitDestructuringObjRestExclusionSet(ListNode* pattern); + [[nodiscard]] bool emitDestructuringObjRestExclusionSet(ListNode* pattern); // emitDestructuringOps assumes the to-be-destructured value has been // pushed on the stack and emits code to destructure each part of a [] or // {} lhs expression. - MOZ_MUST_USE bool emitDestructuringOps(ListNode* pattern, DestructuringFlavor flav); - MOZ_MUST_USE bool emitDestructuringOpsArray(ListNode* pattern, DestructuringFlavor flav); - MOZ_MUST_USE bool emitDestructuringOpsObject(ListNode* pattern, DestructuringFlavor flav); + [[nodiscard]] bool emitDestructuringOps(ListNode* pattern, DestructuringFlavor flav); + [[nodiscard]] bool emitDestructuringOpsArray(ListNode* pattern, DestructuringFlavor flav); + [[nodiscard]] bool emitDestructuringOpsObject(ListNode* pattern, DestructuringFlavor flav); typedef bool (*DestructuringDeclEmitter)(BytecodeEmitter* bce, ParseNode* pn); // Throw a TypeError if the value atop the stack isn't convertible to an // object, with no overall effect on the stack. - MOZ_MUST_USE bool emitRequireObjectCoercible(); + [[nodiscard]] bool emitRequireObjectCoercible(); enum class CopyOption { Filtered, Unfiltered @@ -658,27 +658,27 @@ struct MOZ_STACK_CLASS BytecodeEmitter // Calls either the |CopyDataProperties| or the // |CopyDataPropertiesUnfiltered| intrinsic function, consumes three (or // two in the latter case) elements from the stack. - MOZ_MUST_USE bool emitCopyDataProperties(CopyOption option); + [[nodiscard]] bool emitCopyDataProperties(CopyOption option); // emitIterator expects the iterable to already be on the stack. // It will replace that stack value with the corresponding iterator - MOZ_MUST_USE bool emitIterator(); + [[nodiscard]] bool emitIterator(); - MOZ_MUST_USE bool emitAsyncIterator(); + [[nodiscard]] bool emitAsyncIterator(); // XXX currently used only by OptionalEmitter, research still required // to identify when this was introduced in m-c. - MOZ_MUST_USE bool emitPushNotUndefinedOrNull(); + [[nodiscard]] bool emitPushNotUndefinedOrNull(); // Pops iterator from the top of the stack. Pushes the result of |.next()| // onto the stack. - MOZ_MUST_USE bool emitIteratorNext(ParseNode* pn, IteratorKind kind = IteratorKind::Sync, + [[nodiscard]] bool emitIteratorNext(ParseNode* pn, IteratorKind kind = IteratorKind::Sync, bool allowSelfHosted = false); - MOZ_MUST_USE bool emitIteratorCloseInScope(EmitterScope& currentScope, + [[nodiscard]] bool emitIteratorCloseInScope(EmitterScope& currentScope, IteratorKind iterKind = IteratorKind::Sync, CompletionKind completionKind = CompletionKind::Normal, bool allowSelfHosted = false); - MOZ_MUST_USE bool emitIteratorCloseInInnermostScope(IteratorKind iterKind = IteratorKind::Sync, + [[nodiscard]] bool emitIteratorCloseInInnermostScope(IteratorKind iterKind = IteratorKind::Sync, CompletionKind completionKind = CompletionKind::Normal, bool allowSelfHosted = false) { return emitIteratorCloseInScope(*innermostEmitterScope(), iterKind, completionKind, @@ -686,7 +686,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter } template <typename InnerEmitter> - MOZ_MUST_USE bool wrapWithDestructuringIteratorCloseTryNote(int32_t iterDepth, + [[nodiscard]] bool wrapWithDestructuringIteratorCloseTryNote(int32_t iterDepth, InnerEmitter emitter); // Check if the value on top of the stack is "undefined". If so, replace @@ -694,114 +694,114 @@ struct MOZ_STACK_CLASS BytecodeEmitter // |pattern| is a lhs node of the default expression. If it's an // identifier and |defaultExpr| is an anonymous function, |SetFunctionName| // is called at compile time. - MOZ_MUST_USE bool emitDefault(ParseNode* defaultExpr, ParseNode* pattern); + [[nodiscard]] bool emitDefault(ParseNode* defaultExpr, ParseNode* pattern); - MOZ_MUST_USE bool setOrEmitSetFunName(ParseNode* maybeFun, HandleAtom name); - MOZ_MUST_USE bool setFunName(JSFunction* fun, JSAtom* name); - MOZ_MUST_USE bool emitSetClassConstructorName(JSAtom* name); - MOZ_MUST_USE bool emitSetFunctionNameFromStack(uint8_t offset); + [[nodiscard]] bool setOrEmitSetFunName(ParseNode* maybeFun, HandleAtom name); + [[nodiscard]] bool setFunName(JSFunction* fun, JSAtom* name); + [[nodiscard]] bool emitSetClassConstructorName(JSAtom* name); + [[nodiscard]] bool emitSetFunctionNameFromStack(uint8_t offset); - MOZ_MUST_USE bool emitInitializer(ParseNode* initializer, ParseNode* pattern); + [[nodiscard]] bool emitInitializer(ParseNode* initializer, ParseNode* pattern); - MOZ_MUST_USE bool emitCallSiteObject(CallSiteNode* callSiteObj); - MOZ_MUST_USE bool emitTemplateString(ListNode* templateString); - MOZ_MUST_USE bool emitAssignmentOrInit(ParseNodeKind kind, JSOp compoundOp, + [[nodiscard]] bool emitCallSiteObject(CallSiteNode* callSiteObj); + [[nodiscard]] bool emitTemplateString(ListNode* templateString); + [[nodiscard]] bool emitAssignmentOrInit(ParseNodeKind kind, JSOp compoundOp, ParseNode* lhs, ParseNode* rhs); - MOZ_MUST_USE bool emitShortCircuitAssignment(ParseNodeKind kind, JSOp op, + [[nodiscard]] bool emitShortCircuitAssignment(ParseNodeKind kind, JSOp op, ParseNode* lhs, ParseNode* rhs); - MOZ_MUST_USE bool emitReturn(UnaryNode* returnNode); - MOZ_MUST_USE bool emitStatement(UnaryNode* exprStmt); - MOZ_MUST_USE bool emitStatementList(ListNode* stmtList); + [[nodiscard]] bool emitReturn(UnaryNode* returnNode); + [[nodiscard]] bool emitStatement(UnaryNode* exprStmt); + [[nodiscard]] bool emitStatementList(ListNode* stmtList); - MOZ_MUST_USE bool emitDeleteName(UnaryNode* deleteNode); - MOZ_MUST_USE bool emitDeleteProperty(UnaryNode* deleteNode); - MOZ_MUST_USE bool emitDeleteElement(UnaryNode* deleteNode); - MOZ_MUST_USE bool emitDeleteExpression(UnaryNode* deleteNode); + [[nodiscard]] bool emitDeleteName(UnaryNode* deleteNode); + [[nodiscard]] bool emitDeleteProperty(UnaryNode* deleteNode); + [[nodiscard]] bool emitDeleteElement(UnaryNode* deleteNode); + [[nodiscard]] bool emitDeleteExpression(UnaryNode* deleteNode); // Optional methods which emit Optional Jump Target - MOZ_MUST_USE bool emitOptionalChain(UnaryNode* optionalChain, + [[nodiscard]] bool emitOptionalChain(UnaryNode* optionalChain, ValueUsage valueUsage); - MOZ_MUST_USE bool emitCalleeAndThisForOptionalChain(UnaryNode* optionalChain, + [[nodiscard]] bool emitCalleeAndThisForOptionalChain(UnaryNode* optionalChain, ParseNode* callNode, CallOrNewEmitter& cone); - MOZ_MUST_USE bool emitDeleteOptionalChain(UnaryNode* deleteNode); + [[nodiscard]] bool emitDeleteOptionalChain(UnaryNode* deleteNode); // Optional methods which emit a shortCircuit jump. They need to be called by // a method which emits an Optional Jump Target, see below. - MOZ_MUST_USE bool emitOptionalDotExpression(PropertyAccessBase* prop, + [[nodiscard]] bool emitOptionalDotExpression(PropertyAccessBase* prop, PropOpEmitter& poe, bool isSuper, OptionalEmitter& oe); - MOZ_MUST_USE bool emitOptionalElemExpression(PropertyByValueBase* elem, + [[nodiscard]] bool emitOptionalElemExpression(PropertyByValueBase* elem, ElemOpEmitter& eoe, bool isSuper, OptionalEmitter& oe); - MOZ_MUST_USE bool emitOptionalCall(BinaryNode* callNode, + [[nodiscard]] bool emitOptionalCall(BinaryNode* callNode, OptionalEmitter& oe, ValueUsage valueUsage); - MOZ_MUST_USE bool emitDeletePropertyInOptChain(PropertyAccessBase* propExpr, + [[nodiscard]] bool emitDeletePropertyInOptChain(PropertyAccessBase* propExpr, OptionalEmitter& oe); - MOZ_MUST_USE bool emitDeleteElementInOptChain(PropertyByValueBase* elemExpr, + [[nodiscard]] bool emitDeleteElementInOptChain(PropertyByValueBase* elemExpr, OptionalEmitter& oe); // |op| must be JSOP_TYPEOF or JSOP_TYPEOFEXPR. - MOZ_MUST_USE bool emitTypeof(UnaryNode* typeofNode, JSOp op); + [[nodiscard]] bool emitTypeof(UnaryNode* typeofNode, JSOp op); - MOZ_MUST_USE bool emitUnary(UnaryNode* unaryNode); - MOZ_MUST_USE bool emitRightAssociative(ListNode* node); - MOZ_MUST_USE bool emitLeftAssociative(ListNode* node); - MOZ_MUST_USE bool emitLogical(ListNode* node); - MOZ_MUST_USE bool emitSequenceExpr(ListNode* node, + [[nodiscard]] bool emitUnary(UnaryNode* unaryNode); + [[nodiscard]] bool emitRightAssociative(ListNode* node); + [[nodiscard]] bool emitLeftAssociative(ListNode* node); + [[nodiscard]] bool emitLogical(ListNode* node); + [[nodiscard]] bool emitSequenceExpr(ListNode* node, ValueUsage valueUsage = ValueUsage::WantValue); - MOZ_NEVER_INLINE MOZ_MUST_USE bool emitIncOrDec(UnaryNode* incDec); + [[nodiscard]] MOZ_NEVER_INLINE bool emitIncOrDec(UnaryNode* incDec); - MOZ_MUST_USE bool emitConditionalExpression(ConditionalExpression& conditional, + [[nodiscard]] bool emitConditionalExpression(ConditionalExpression& conditional, ValueUsage valueUsage = ValueUsage::WantValue); - MOZ_MUST_USE bool isRestParameter(ParseNode* pn); - MOZ_MUST_USE bool emitOptimizeSpread(ParseNode* arg0, JumpList* jmp, bool* emitted); + [[nodiscard]] bool isRestParameter(ParseNode* pn); + [[nodiscard]] bool emitOptimizeSpread(ParseNode* arg0, JumpList* jmp, bool* emitted); - MOZ_MUST_USE ParseNode* getCoordNode(ParseNode* callNode, ParseNode* calleeNode, + [[nodiscard]] ParseNode* getCoordNode(ParseNode* callNode, ParseNode* calleeNode, ListNode* argsList); - MOZ_MUST_USE bool emitArguments(ListNode* argsList, bool isCall, bool isSpread, + [[nodiscard]] bool emitArguments(ListNode* argsList, bool isCall, bool isSpread, CallOrNewEmitter& cone); - MOZ_MUST_USE bool emitCallOrNew(BinaryNode* pn, + [[nodiscard]] bool emitCallOrNew(BinaryNode* pn, ValueUsage valueUsage = ValueUsage::WantValue); - MOZ_MUST_USE bool emitCalleeAndThis(ParseNode* callNode, + [[nodiscard]] bool emitCalleeAndThis(ParseNode* callNode, ParseNode* calleeNode, CallOrNewEmitter& cone); - MOZ_MUST_USE bool emitOptionalCalleeAndThis(ParseNode* callNode, + [[nodiscard]] bool emitOptionalCalleeAndThis(ParseNode* callNode, ParseNode* calleeNode, CallOrNewEmitter& cone, OptionalEmitter& oe); - MOZ_MUST_USE bool emitSelfHostedCallFunction(BinaryNode* callNode); - MOZ_MUST_USE bool emitSelfHostedResumeGenerator(BinaryNode* callNode); - MOZ_MUST_USE bool emitSelfHostedForceInterpreter(ParseNode* pn); - MOZ_MUST_USE bool emitSelfHostedAllowContentIter(BinaryNode* callNode); + [[nodiscard]] bool emitSelfHostedCallFunction(BinaryNode* callNode); + [[nodiscard]] bool emitSelfHostedResumeGenerator(BinaryNode* callNode); + [[nodiscard]] bool emitSelfHostedForceInterpreter(ParseNode* pn); + [[nodiscard]] bool emitSelfHostedAllowContentIter(BinaryNode* callNode); - MOZ_MUST_USE bool emitComprehensionFor(ForNode* forNode); - MOZ_MUST_USE bool emitComprehensionForIn(ForNode* forNode); - MOZ_MUST_USE bool emitComprehensionForInOrOfVariables(ParseNode* pn, bool* lexicalScope); - MOZ_MUST_USE bool emitComprehensionForOf(ForNode* forNode); + [[nodiscard]] bool emitComprehensionFor(ForNode* forNode); + [[nodiscard]] bool emitComprehensionForIn(ForNode* forNode); + [[nodiscard]] bool emitComprehensionForInOrOfVariables(ParseNode* pn, bool* lexicalScope); + [[nodiscard]] bool emitComprehensionForOf(ForNode* forNode); - MOZ_MUST_USE bool emitDo(BinaryNode* doNode); - MOZ_MUST_USE bool emitWhile(BinaryNode* whileNode); + [[nodiscard]] bool emitDo(BinaryNode* doNode); + [[nodiscard]] bool emitWhile(BinaryNode* whileNode); - MOZ_MUST_USE bool emitFor(ForNode* forNode, const EmitterScope* headLexicalEmitterScope = nullptr); - MOZ_MUST_USE bool emitCStyleFor(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); - MOZ_MUST_USE bool emitForIn(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); - MOZ_MUST_USE bool emitForOf(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); + [[nodiscard]] bool emitFor(ForNode* forNode, const EmitterScope* headLexicalEmitterScope = nullptr); + [[nodiscard]] bool emitCStyleFor(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); + [[nodiscard]] bool emitForIn(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); + [[nodiscard]] bool emitForOf(ForNode* forNode, const EmitterScope* headLexicalEmitterScope); - MOZ_MUST_USE bool emitInitializeForInOrOfTarget(TernaryNode* forHead); + [[nodiscard]] bool emitInitializeForInOrOfTarget(TernaryNode* forHead); - MOZ_MUST_USE bool emitBreak(PropertyName* label); - MOZ_MUST_USE bool emitContinue(PropertyName* label); + [[nodiscard]] bool emitBreak(PropertyName* label); + [[nodiscard]] bool emitContinue(PropertyName* label); - MOZ_MUST_USE bool emitFunctionFormalParameters(ListNode* paramsBody); - MOZ_MUST_USE bool emitInitializeFunctionSpecialNames(); - MOZ_MUST_USE bool emitLexicalInitialization(NameNode* pn); - MOZ_MUST_USE bool emitLexicalInitialization(JSAtom* name); + [[nodiscard]] bool emitFunctionFormalParameters(ListNode* paramsBody); + [[nodiscard]] bool emitInitializeFunctionSpecialNames(); + [[nodiscard]] bool emitLexicalInitialization(NameNode* pn); + [[nodiscard]] bool emitLexicalInitialization(JSAtom* name); // Emit bytecode for the spread operator. // @@ -811,9 +811,9 @@ struct MOZ_STACK_CLASS BytecodeEmitter // |.next()| and put the results into the I-th element of array with // incrementing I, then push the result I (it will be original I + // iteration count). The stack after iteration will look like |ARRAY INDEX|. - MOZ_MUST_USE bool emitSpread(bool allowSelfHosted = false); + [[nodiscard]] bool emitSpread(bool allowSelfHosted = false); - MOZ_MUST_USE bool emitClass(ClassNode* classNode); + [[nodiscard]] bool emitClass(ClassNode* classNode); }; class MOZ_RAII AutoCheckUnstableEmitterScope { |