1468 lines
47 KiB
C++
1468 lines
47 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef frontend_ParseNode_h
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#define frontend_ParseNode_h
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#include "mozilla/Attributes.h"
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#include "builtin/ModuleObject.h"
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#include "frontend/TokenStream.h"
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namespace js {
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namespace frontend {
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class ParseContext;
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class FullParseHandler;
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class FunctionBox;
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class ObjectBox;
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#define FOR_EACH_PARSE_NODE_KIND(F) \
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F(NOP) \
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F(SEMI) \
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F(COMMA) \
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F(CONDITIONAL) \
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F(COLON) \
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F(SHORTHAND) \
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F(POS) \
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F(NEG) \
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F(PREINCREMENT) \
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F(POSTINCREMENT) \
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F(PREDECREMENT) \
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F(POSTDECREMENT) \
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F(DOT) \
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F(ELEM) \
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F(ARRAY) \
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F(ELISION) \
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F(STATEMENTLIST) \
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F(LABEL) \
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F(OBJECT) \
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F(CALL) \
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F(NAME) \
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F(OBJECT_PROPERTY_NAME) \
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F(COMPUTED_NAME) \
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F(NUMBER) \
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F(STRING) \
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F(TEMPLATE_STRING_LIST) \
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F(TEMPLATE_STRING) \
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F(TAGGED_TEMPLATE) \
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F(CALLSITEOBJ) \
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F(REGEXP) \
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F(TRUE) \
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F(FALSE) \
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F(NULL) \
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F(THIS) \
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F(FUNCTION) \
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F(MODULE) \
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F(IF) \
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F(SWITCH) \
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F(CASE) \
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F(WHILE) \
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F(DOWHILE) \
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F(FOR) \
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F(COMPREHENSIONFOR) \
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F(BREAK) \
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F(CONTINUE) \
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F(VAR) \
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F(CONST) \
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F(WITH) \
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F(RETURN) \
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F(NEW) \
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/* Delete operations. These must be sequential. */ \
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F(DELETENAME) \
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F(DELETEPROP) \
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F(DELETEELEM) \
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F(DELETEEXPR) \
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F(TRY) \
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F(CATCH) \
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F(CATCHLIST) \
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F(THROW) \
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F(DEBUGGER) \
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F(GENERATOR) \
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F(YIELD) \
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F(YIELD_STAR) \
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F(GENEXP) \
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F(ARRAYCOMP) \
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F(ARRAYPUSH) \
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F(LEXICALSCOPE) \
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F(LET) \
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F(IMPORT) \
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F(IMPORT_SPEC_LIST) \
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F(IMPORT_SPEC) \
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F(EXPORT) \
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F(EXPORT_FROM) \
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F(EXPORT_DEFAULT) \
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F(EXPORT_SPEC_LIST) \
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F(EXPORT_SPEC) \
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F(EXPORT_BATCH_SPEC) \
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F(FORIN) \
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F(FOROF) \
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F(FORHEAD) \
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F(PARAMSBODY) \
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F(SPREAD) \
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F(MUTATEPROTO) \
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F(CLASS) \
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F(CLASSMETHOD) \
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F(CLASSMETHODLIST) \
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F(CLASSNAMES) \
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F(NEWTARGET) \
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F(POSHOLDER) \
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F(SUPERBASE) \
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F(SUPERCALL) \
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F(SETTHIS) \
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\
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/* Unary operators. */ \
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F(TYPEOFNAME) \
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F(TYPEOFEXPR) \
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F(VOID) \
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F(NOT) \
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F(BITNOT) \
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F(AWAIT) \
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\
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/* \
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* Binary operators. \
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* These must be in the same order as TOK_OR and friends in TokenStream.h. \
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*/ \
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F(OR) \
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F(AND) \
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F(BITOR) \
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F(BITXOR) \
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F(BITAND) \
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F(STRICTEQ) \
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F(EQ) \
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F(STRICTNE) \
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F(NE) \
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F(LT) \
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F(LE) \
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F(GT) \
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F(GE) \
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F(INSTANCEOF) \
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F(IN) \
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F(LSH) \
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F(RSH) \
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F(URSH) \
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F(ADD) \
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F(SUB) \
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F(STAR) \
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F(DIV) \
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F(MOD) \
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F(POW) \
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\
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/* Assignment operators (= += -= etc.). */ \
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/* ParseNode::isAssignment assumes all these are consecutive. */ \
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F(ASSIGN) \
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F(ADDASSIGN) \
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F(SUBASSIGN) \
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F(BITORASSIGN) \
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F(BITXORASSIGN) \
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F(BITANDASSIGN) \
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F(LSHASSIGN) \
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F(RSHASSIGN) \
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F(URSHASSIGN) \
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F(MULASSIGN) \
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F(DIVASSIGN) \
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F(MODASSIGN) \
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F(POWASSIGN)
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/*
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* Parsing builds a tree of nodes that directs code generation. This tree is
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* not a concrete syntax tree in all respects (for example, || and && are left
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* associative, but (A && B && C) translates into the right-associated tree
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* <A && <B && C>> so that code generation can emit a left-associative branch
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* around <B && C> when A is false). Nodes are labeled by kind, with a
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* secondary JSOp label when needed.
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*
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* The long comment after this enum block describes the kinds in detail.
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*/
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enum ParseNodeKind
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{
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#define EMIT_ENUM(name) PNK_##name,
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FOR_EACH_PARSE_NODE_KIND(EMIT_ENUM)
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#undef EMIT_ENUM
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PNK_LIMIT, /* domain size */
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PNK_BINOP_FIRST = PNK_OR,
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PNK_BINOP_LAST = PNK_POW,
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PNK_ASSIGNMENT_START = PNK_ASSIGN,
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PNK_ASSIGNMENT_LAST = PNK_POWASSIGN
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};
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inline bool
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IsDeleteKind(ParseNodeKind kind)
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{
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return PNK_DELETENAME <= kind && kind <= PNK_DELETEEXPR;
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}
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inline bool
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IsTypeofKind(ParseNodeKind kind)
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{
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return PNK_TYPEOFNAME <= kind && kind <= PNK_TYPEOFEXPR;
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}
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/*
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* Label Variant Members
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* ----- ------- -------
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* <Definitions>
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* PNK_FUNCTION name pn_funbox: ptr to js::FunctionBox holding function
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* object containing arg and var properties. We
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* create the function object at parse (not emit)
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* time to specialize arg and var bytecodes early.
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* pn_body: PNK_PARAMSBODY, ordinarily;
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* PNK_LEXICALSCOPE for implicit function in genexpr
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* PNK_PARAMSBODY list list of formal parameters with
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* PNK_NAME node with non-empty name for
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* SingleNameBinding without Initializer
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* PNK_ASSIGN node for SingleNameBinding with
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* Initializer
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* PNK_NAME node with empty name for destructuring
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* pn_expr: PNK_ARRAY, PNK_OBJECT, or PNK_ASSIGN
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* PNK_ARRAY or PNK_OBJECT for BindingPattern
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* without Initializer
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* PNK_ASSIGN for BindingPattern with
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* Initializer
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* followed by:
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* PNK_STATEMENTLIST node for function body
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* statements,
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* PNK_RETURN for expression closure
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* pn_count: 1 + number of formal parameters
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* pn_tree: PNK_PARAMSBODY or PNK_STATEMENTLIST node
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* PNK_SPREAD unary pn_kid: expression being spread
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*
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* <Statements>
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* PNK_STATEMENTLIST list pn_head: list of pn_count statements
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* PNK_IF ternary pn_kid1: cond, pn_kid2: then, pn_kid3: else or null.
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* In body of a comprehension or desugared generator
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* expression, pn_kid2 is PNK_YIELD, PNK_ARRAYPUSH,
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* or (if the push was optimized away) empty
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* PNK_STATEMENTLIST.
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* PNK_SWITCH binary pn_left: discriminant
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* pn_right: list of PNK_CASE nodes, with at most one
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* default node, or if there are let bindings
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* in the top level of the switch body's cases, a
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* PNK_LEXICALSCOPE node that contains the list of
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* PNK_CASE nodes.
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* PNK_CASE binary pn_left: case-expression if CaseClause, or
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* null if DefaultClause
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* pn_right: PNK_STATEMENTLIST node for this case's
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* statements
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* pn_u.binary.offset: scratch space for the emitter
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* PNK_WHILE binary pn_left: cond, pn_right: body
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* PNK_DOWHILE binary pn_left: body, pn_right: cond
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* PNK_FOR binary pn_left: either PNK_FORIN (for-in statement),
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* PNK_FOROF (for-of) or PNK_FORHEAD (for(;;))
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* pn_right: body
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* PNK_COMPREHENSIONFOR pn_left: either PNK_FORIN or PNK_FOROF
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* binary pn_right: body
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* PNK_FORIN ternary pn_kid1: declaration or expression to left of 'in'
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* pn_kid2: null
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* pn_kid3: object expr to right of 'in'
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* PNK_FOROF ternary pn_kid1: declaration or expression to left of 'of'
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* pn_kid2: null
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* pn_kid3: expr to right of 'of'
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* PNK_FORHEAD ternary pn_kid1: init expr before first ';' or nullptr
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* pn_kid2: cond expr before second ';' or nullptr
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* pn_kid3: update expr after second ';' or nullptr
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* PNK_THROW unary pn_op: JSOP_THROW, pn_kid: exception
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* PNK_TRY ternary pn_kid1: try block
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* pn_kid2: null or PNK_CATCHLIST list
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* pn_kid3: null or finally block
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* PNK_CATCHLIST list pn_head: list of PNK_LEXICALSCOPE nodes, one per
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* catch-block, each with pn_expr pointing
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* to a PNK_CATCH node
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* PNK_CATCH ternary pn_kid1: PNK_NAME, PNK_ARRAY, or PNK_OBJECT catch var node
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* (PNK_ARRAY or PNK_OBJECT if destructuring)
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* pn_kid2: null or the catch guard expression
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* pn_kid3: catch block statements
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* PNK_BREAK name pn_atom: label or null
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* PNK_CONTINUE name pn_atom: label or null
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* PNK_WITH binary pn_left: head expr; pn_right: body;
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* PNK_VAR, list pn_head: list of PNK_NAME or PNK_ASSIGN nodes
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* PNK_LET, each name node has either
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* PNK_CONST pn_used: false
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* pn_atom: variable name
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* pn_expr: initializer or null
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* or
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* pn_used: true
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* pn_atom: variable name
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* pn_lexdef: def node
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* each assignment node has
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* pn_left: PNK_NAME with pn_used true and
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* pn_lexdef (NOT pn_expr) set
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* pn_right: initializer
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* PNK_RETURN unary pn_kid: return expr or null
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* PNK_SEMI unary pn_kid: expr or null statement
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* pn_prologue: true if Directive Prologue member
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* in original source, not introduced via
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* constant folding or other tree rewriting
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* PNK_LABEL name pn_atom: label, pn_expr: labeled statement
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* PNK_IMPORT binary pn_left: PNK_IMPORT_SPEC_LIST import specifiers
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* pn_right: PNK_STRING module specifier
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* PNK_EXPORT unary pn_kid: declaration expression
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* PNK_EXPORT_FROM binary pn_left: PNK_EXPORT_SPEC_LIST export specifiers
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* pn_right: PNK_STRING module specifier
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* PNK_EXPORT_DEFAULT unary pn_kid: export default declaration or expression
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*
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* <Expressions>
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* All left-associated binary trees of the same type are optimized into lists
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* to avoid recursion when processing expression chains.
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* PNK_COMMA list pn_head: list of pn_count comma-separated exprs
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* PNK_ASSIGN binary pn_left: lvalue, pn_right: rvalue
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* PNK_ADDASSIGN, binary pn_left: lvalue, pn_right: rvalue
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* PNK_SUBASSIGN, pn_op: JSOP_ADD for +=, etc.
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* PNK_BITORASSIGN,
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* PNK_BITXORASSIGN,
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* PNK_BITANDASSIGN,
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* PNK_LSHASSIGN,
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* PNK_RSHASSIGN,
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* PNK_URSHASSIGN,
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* PNK_MULASSIGN,
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* PNK_DIVASSIGN,
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* PNK_MODASSIGN,
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* PNK_POWASSIGN
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* PNK_CONDITIONAL ternary (cond ? trueExpr : falseExpr)
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* pn_kid1: cond, pn_kid2: then, pn_kid3: else
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* PNK_OR, list pn_head; list of pn_count subexpressions
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* PNK_AND, All of these operators are left-associative except (**).
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* PNK_BITOR,
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* PNK_BITXOR,
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* PNK_BITAND,
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* PNK_EQ,
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* PNK_NE,
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* PNK_STRICTEQ,
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* PNK_STRICTNE,
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* PNK_LT,
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* PNK_LE,
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* PNK_GT,
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* PNK_GE,
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* PNK_LSH,
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* PNK_RSH,
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* PNK_URSH,
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* PNK_ADD,
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* PNK_SUB,
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* PNK_STAR,
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* PNK_DIV,
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* PNK_MOD,
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* PNK_POW (**) is right-associative, but forms a list
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* nonetheless. Special hacks everywhere.
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*
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* PNK_POS, unary pn_kid: UNARY expr
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* PNK_NEG
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* PNK_VOID, unary pn_kid: UNARY expr
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* PNK_NOT,
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* PNK_BITNOT,
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* PNK_AWAIT
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* PNK_TYPEOFNAME, unary pn_kid: UNARY expr
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* PNK_TYPEOFEXPR
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* PNK_PREINCREMENT, unary pn_kid: MEMBER expr
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* PNK_POSTINCREMENT,
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* PNK_PREDECREMENT,
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* PNK_POSTDECREMENT
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* PNK_NEW list pn_head: list of ctor, arg1, arg2, ... argN
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* pn_count: 1 + N (where N is number of args)
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* ctor is a MEMBER expr
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* PNK_DELETENAME unary pn_kid: PNK_NAME expr
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* PNK_DELETEPROP unary pn_kid: PNK_DOT expr
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* PNK_DELETEELEM unary pn_kid: PNK_ELEM expr
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* PNK_DELETEEXPR unary pn_kid: MEMBER expr that's evaluated, then the
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* overall delete evaluates to true; can't be a kind
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* for a more-specific PNK_DELETE* unless constant
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* folding (or a similar parse tree manipulation) has
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* occurred
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* PNK_DOT name pn_expr: MEMBER expr to left of .
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* pn_atom: name to right of .
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* PNK_ELEM binary pn_left: MEMBER expr to left of [
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* pn_right: expr between [ and ]
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* PNK_CALL list pn_head: list of call, arg1, arg2, ... argN
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* pn_count: 1 + N (where N is number of args)
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* call is a MEMBER expr naming a callable object
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* PNK_GENEXP list Exactly like PNK_CALL, used for the implicit call
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* in the desugaring of a generator-expression.
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* PNK_ARRAY list pn_head: list of pn_count array element exprs
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* [,,] holes are represented by PNK_ELISION nodes
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* pn_xflags: PN_ENDCOMMA if extra comma at end
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* PNK_OBJECT list pn_head: list of pn_count binary PNK_COLON nodes
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* PNK_COLON binary key-value pair in object initializer or
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* destructuring lhs
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* pn_left: property id, pn_right: value
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* PNK_SHORTHAND binary Same fields as PNK_COLON. This is used for object
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* literal properties using shorthand ({x}).
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* PNK_COMPUTED_NAME unary ES6 ComputedPropertyName.
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* pn_kid: the AssignmentExpression inside the square brackets
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* PNK_NAME, name pn_atom: name, string, or object atom
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* PNK_STRING pn_op: JSOP_GETNAME, JSOP_STRING, or JSOP_OBJECT
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* If JSOP_GETNAME, pn_op may be JSOP_*ARG or JSOP_*VAR
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* telling const-ness and static analysis results
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* PNK_TEMPLATE_STRING_LIST pn_head: list of alternating expr and template strings
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* list
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* PNK_TEMPLATE_STRING pn_atom: template string atom
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nullary pn_op: JSOP_NOP
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* PNK_TAGGED_TEMPLATE pn_head: list of call, call site object, arg1, arg2, ... argN
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* list pn_count: 2 + N (N is the number of substitutions)
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* PNK_CALLSITEOBJ list pn_head: a PNK_ARRAY node followed by
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* list of pn_count - 1 PNK_TEMPLATE_STRING nodes
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* PNK_REGEXP nullary pn_objbox: RegExp model object
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* PNK_NUMBER dval pn_dval: double value of numeric literal
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* PNK_TRUE, nullary pn_op: JSOp bytecode
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* PNK_FALSE,
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* PNK_NULL
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*
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* PNK_THIS, unary pn_kid: '.this' Name if function `this`, else nullptr
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* PNK_SUPERBASE unary pn_kid: '.this' Name
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*
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* PNK_SETTHIS binary pn_left: '.this' Name, pn_right: SuperCall
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*
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* PNK_LEXICALSCOPE scope pn_u.scope.bindings: scope bindings
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* pn_u.scope.body: scope body
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* PNK_GENERATOR nullary
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* PNK_YIELD, binary pn_left: expr or null; pn_right: generator object
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* PNK_YIELD_STAR
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* PNK_ARRAYCOMP list pn_count: 1
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* pn_head: list of 1 element, which is block
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* enclosing for loop(s) and optionally
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* if-guarded PNK_ARRAYPUSH
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* PNK_ARRAYPUSH unary pn_op: JSOP_ARRAYCOMP
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* pn_kid: array comprehension expression
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* PNK_NOP nullary
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*/
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enum ParseNodeArity
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{
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PN_NULLARY, /* 0 kids, only pn_atom/pn_dval/etc. */
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PN_UNARY, /* one kid, plus a couple of scalars */
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PN_BINARY, /* two kids, plus a couple of scalars */
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PN_TERNARY, /* three kids */
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PN_CODE, /* module or function definition node */
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PN_LIST, /* generic singly linked list */
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PN_NAME, /* name, label, or regexp */
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PN_SCOPE /* lexical scope */
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};
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class LoopControlStatement;
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class BreakStatement;
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class ContinueStatement;
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class ConditionalExpression;
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class PropertyAccess;
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class ParseNode
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{
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uint16_t pn_type; /* PNK_* type */
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uint8_t pn_op; /* see JSOp enum and jsopcode.tbl */
|
|
uint8_t pn_arity:4; /* see ParseNodeArity enum */
|
|
bool pn_parens:1; /* this expr was enclosed in parens */
|
|
bool pn_rhs_anon_fun:1; /* this expr is anonymous function or class that
|
|
* is a direct RHS of PNK_ASSIGN or PNK_COLON of
|
|
* property, that needs SetFunctionName. */
|
|
|
|
ParseNode(const ParseNode& other) = delete;
|
|
void operator=(const ParseNode& other) = delete;
|
|
|
|
public:
|
|
ParseNode(ParseNodeKind kind, JSOp op, ParseNodeArity arity)
|
|
: pn_type(kind),
|
|
pn_op(op),
|
|
pn_arity(arity),
|
|
pn_parens(false),
|
|
pn_rhs_anon_fun(false),
|
|
pn_pos(0, 0),
|
|
pn_next(nullptr)
|
|
{
|
|
MOZ_ASSERT(kind < PNK_LIMIT);
|
|
memset(&pn_u, 0, sizeof pn_u);
|
|
}
|
|
|
|
ParseNode(ParseNodeKind kind, JSOp op, ParseNodeArity arity, const TokenPos& pos)
|
|
: pn_type(kind),
|
|
pn_op(op),
|
|
pn_arity(arity),
|
|
pn_parens(false),
|
|
pn_rhs_anon_fun(false),
|
|
pn_pos(pos),
|
|
pn_next(nullptr)
|
|
{
|
|
MOZ_ASSERT(kind < PNK_LIMIT);
|
|
memset(&pn_u, 0, sizeof pn_u);
|
|
}
|
|
|
|
JSOp getOp() const { return JSOp(pn_op); }
|
|
void setOp(JSOp op) { pn_op = op; }
|
|
bool isOp(JSOp op) const { return getOp() == op; }
|
|
|
|
ParseNodeKind getKind() const {
|
|
MOZ_ASSERT(pn_type < PNK_LIMIT);
|
|
return ParseNodeKind(pn_type);
|
|
}
|
|
void setKind(ParseNodeKind kind) {
|
|
MOZ_ASSERT(kind < PNK_LIMIT);
|
|
pn_type = kind;
|
|
}
|
|
bool isKind(ParseNodeKind kind) const { return getKind() == kind; }
|
|
|
|
ParseNodeArity getArity() const { return ParseNodeArity(pn_arity); }
|
|
bool isArity(ParseNodeArity a) const { return getArity() == a; }
|
|
void setArity(ParseNodeArity a) { pn_arity = a; }
|
|
|
|
bool isAssignment() const {
|
|
ParseNodeKind kind = getKind();
|
|
return PNK_ASSIGNMENT_START <= kind && kind <= PNK_ASSIGNMENT_LAST;
|
|
}
|
|
|
|
bool isBinaryOperation() const {
|
|
ParseNodeKind kind = getKind();
|
|
return PNK_BINOP_FIRST <= kind && kind <= PNK_BINOP_LAST;
|
|
}
|
|
|
|
/* Boolean attributes. */
|
|
bool isInParens() const { return pn_parens; }
|
|
bool isLikelyIIFE() const { return isInParens(); }
|
|
void setInParens(bool enabled) { pn_parens = enabled; }
|
|
|
|
bool isDirectRHSAnonFunction() const {
|
|
return pn_rhs_anon_fun;
|
|
}
|
|
void setDirectRHSAnonFunction(bool enabled) {
|
|
pn_rhs_anon_fun = enabled;
|
|
}
|
|
|
|
TokenPos pn_pos; /* two 16-bit pairs here, for 64 bits */
|
|
ParseNode* pn_next; /* intrinsic link in parent PN_LIST */
|
|
|
|
union {
|
|
struct { /* list of next-linked nodes */
|
|
ParseNode* head; /* first node in list */
|
|
ParseNode** tail; /* ptr to ptr to last node in list */
|
|
uint32_t count; /* number of nodes in list */
|
|
uint32_t xflags; /* see PNX_* below */
|
|
} list;
|
|
struct { /* ternary: if, for(;;), ?: */
|
|
ParseNode* kid1; /* condition, discriminant, etc. */
|
|
ParseNode* kid2; /* then-part, case list, etc. */
|
|
ParseNode* kid3; /* else-part, default case, etc. */
|
|
} ternary;
|
|
struct { /* two kids if binary */
|
|
ParseNode* left;
|
|
ParseNode* right;
|
|
union {
|
|
unsigned iflags; /* JSITER_* flags for PNK_{COMPREHENSION,}FOR node */
|
|
bool isStatic; /* only for PNK_CLASSMETHOD */
|
|
uint32_t offset; /* for the emitter's use on PNK_CASE nodes */
|
|
};
|
|
} binary;
|
|
struct { /* one kid if unary */
|
|
ParseNode* kid;
|
|
bool prologue; /* directive prologue member (as
|
|
pn_prologue) */
|
|
} unary;
|
|
struct { /* name, labeled statement, etc. */
|
|
union {
|
|
JSAtom* atom; /* lexical name or label atom */
|
|
ObjectBox* objbox; /* regexp object */
|
|
FunctionBox* funbox; /* function object */
|
|
};
|
|
ParseNode* expr; /* module or function body, var
|
|
initializer, argument default, or
|
|
base object of PNK_DOT */
|
|
} name;
|
|
struct {
|
|
LexicalScope::Data* bindings;
|
|
ParseNode* body;
|
|
} scope;
|
|
struct {
|
|
double value; /* aligned numeric literal value */
|
|
DecimalPoint decimalPoint; /* Whether the number has a decimal point */
|
|
} number;
|
|
class {
|
|
friend class LoopControlStatement;
|
|
PropertyName* label; /* target of break/continue statement */
|
|
} loopControl;
|
|
} pn_u;
|
|
|
|
#define pn_objbox pn_u.name.objbox
|
|
#define pn_funbox pn_u.name.funbox
|
|
#define pn_body pn_u.name.expr
|
|
#define pn_head pn_u.list.head
|
|
#define pn_tail pn_u.list.tail
|
|
#define pn_count pn_u.list.count
|
|
#define pn_xflags pn_u.list.xflags
|
|
#define pn_kid1 pn_u.ternary.kid1
|
|
#define pn_kid2 pn_u.ternary.kid2
|
|
#define pn_kid3 pn_u.ternary.kid3
|
|
#define pn_left pn_u.binary.left
|
|
#define pn_right pn_u.binary.right
|
|
#define pn_pval pn_u.binary.pval
|
|
#define pn_iflags pn_u.binary.iflags
|
|
#define pn_kid pn_u.unary.kid
|
|
#define pn_prologue pn_u.unary.prologue
|
|
#define pn_atom pn_u.name.atom
|
|
#define pn_objbox pn_u.name.objbox
|
|
#define pn_expr pn_u.name.expr
|
|
#define pn_dval pn_u.number.value
|
|
|
|
|
|
public:
|
|
/*
|
|
* If |left| is a list of the given kind/left-associative op, append
|
|
* |right| to it and return |left|. Otherwise return a [left, right] list.
|
|
*/
|
|
static ParseNode*
|
|
appendOrCreateList(ParseNodeKind kind, JSOp op, ParseNode* left, ParseNode* right,
|
|
FullParseHandler* handler, ParseContext* pc);
|
|
|
|
inline PropertyName* name() const;
|
|
inline JSAtom* atom() const;
|
|
|
|
ParseNode* expr() const {
|
|
MOZ_ASSERT(pn_arity == PN_NAME || pn_arity == PN_CODE);
|
|
return pn_expr;
|
|
}
|
|
|
|
bool isEmptyScope() const {
|
|
MOZ_ASSERT(pn_arity == PN_SCOPE);
|
|
return !pn_u.scope.bindings;
|
|
}
|
|
|
|
Handle<LexicalScope::Data*> scopeBindings() const {
|
|
MOZ_ASSERT(!isEmptyScope());
|
|
// Bindings' GC safety depend on the presence of an AutoKeepAtoms that
|
|
// the rest of the frontend also depends on.
|
|
return Handle<LexicalScope::Data*>::fromMarkedLocation(&pn_u.scope.bindings);
|
|
}
|
|
|
|
ParseNode* scopeBody() const {
|
|
MOZ_ASSERT(pn_arity == PN_SCOPE);
|
|
return pn_u.scope.body;
|
|
}
|
|
|
|
void setScopeBody(ParseNode* body) {
|
|
MOZ_ASSERT(pn_arity == PN_SCOPE);
|
|
pn_u.scope.body = body;
|
|
}
|
|
|
|
/* PN_LIST pn_xflags bits. */
|
|
#define PNX_FUNCDEFS 0x01 /* contains top-level function statements */
|
|
#define PNX_ARRAYHOLESPREAD 0x02 /* one or more of
|
|
1. array initialiser has holes
|
|
2. array initializer has spread node */
|
|
#define PNX_NONCONST 0x04 /* initialiser has non-constants */
|
|
|
|
bool functionIsHoisted() const {
|
|
MOZ_ASSERT(pn_arity == PN_CODE && getKind() == PNK_FUNCTION);
|
|
MOZ_ASSERT(isOp(JSOP_LAMBDA) || // lambda, genexpr
|
|
isOp(JSOP_LAMBDA_ARROW) || // arrow function
|
|
isOp(JSOP_DEFFUN) || // non-body-level function statement
|
|
isOp(JSOP_NOP) || // body-level function stmt in global code
|
|
isOp(JSOP_GETLOCAL) || // body-level function stmt in function code
|
|
isOp(JSOP_GETARG) || // body-level function redeclaring formal
|
|
isOp(JSOP_INITLEXICAL)); // block-level function stmt
|
|
return !isOp(JSOP_LAMBDA) && !isOp(JSOP_LAMBDA_ARROW) && !isOp(JSOP_DEFFUN);
|
|
}
|
|
|
|
/*
|
|
* True if this statement node could be a member of a Directive Prologue: an
|
|
* expression statement consisting of a single string literal.
|
|
*
|
|
* This considers only the node and its children, not its context. After
|
|
* parsing, check the node's pn_prologue flag to see if it is indeed part of
|
|
* a directive prologue.
|
|
*
|
|
* Note that a Directive Prologue can contain statements that cannot
|
|
* themselves be directives (string literals that include escape sequences
|
|
* or escaped newlines, say). This member function returns true for such
|
|
* nodes; we use it to determine the extent of the prologue.
|
|
*/
|
|
JSAtom* isStringExprStatement() const {
|
|
if (getKind() == PNK_SEMI) {
|
|
MOZ_ASSERT(pn_arity == PN_UNARY);
|
|
ParseNode* kid = pn_kid;
|
|
if (kid && kid->getKind() == PNK_STRING && !kid->pn_parens)
|
|
return kid->pn_atom;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
/* True if pn is a parsenode representing a literal constant. */
|
|
bool isLiteral() const {
|
|
return isKind(PNK_NUMBER) ||
|
|
isKind(PNK_STRING) ||
|
|
isKind(PNK_TRUE) ||
|
|
isKind(PNK_FALSE) ||
|
|
isKind(PNK_NULL);
|
|
}
|
|
|
|
/* Return true if this node appears in a Directive Prologue. */
|
|
bool isDirectivePrologueMember() const { return pn_prologue; }
|
|
|
|
// True iff this is a for-in/of loop variable declaration (var/let/const).
|
|
bool isForLoopDeclaration() const {
|
|
if (isKind(PNK_VAR) || isKind(PNK_LET) || isKind(PNK_CONST)) {
|
|
MOZ_ASSERT(isArity(PN_LIST));
|
|
MOZ_ASSERT(pn_count > 0);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
ParseNode* generatorExpr() const {
|
|
MOZ_ASSERT(isKind(PNK_GENEXP));
|
|
|
|
ParseNode* callee = this->pn_head;
|
|
MOZ_ASSERT(callee->isKind(PNK_FUNCTION));
|
|
|
|
ParseNode* paramsBody = callee->pn_body;
|
|
MOZ_ASSERT(paramsBody->isKind(PNK_PARAMSBODY));
|
|
|
|
ParseNode* body = paramsBody->last();
|
|
MOZ_ASSERT(body->isKind(PNK_STATEMENTLIST));
|
|
MOZ_ASSERT(body->last()->isKind(PNK_LEXICALSCOPE) ||
|
|
body->last()->isKind(PNK_COMPREHENSIONFOR));
|
|
return body->last();
|
|
}
|
|
|
|
/*
|
|
* Compute a pointer to the last element in a singly-linked list. NB: list
|
|
* must be non-empty for correct PN_LAST usage -- this is asserted!
|
|
*/
|
|
ParseNode* last() const {
|
|
MOZ_ASSERT(pn_arity == PN_LIST);
|
|
MOZ_ASSERT(pn_count != 0);
|
|
return (ParseNode*)(uintptr_t(pn_tail) - offsetof(ParseNode, pn_next));
|
|
}
|
|
|
|
void initNumber(double value, DecimalPoint decimalPoint) {
|
|
MOZ_ASSERT(pn_arity == PN_NULLARY);
|
|
MOZ_ASSERT(getKind() == PNK_NUMBER);
|
|
pn_u.number.value = value;
|
|
pn_u.number.decimalPoint = decimalPoint;
|
|
}
|
|
|
|
void makeEmpty() {
|
|
MOZ_ASSERT(pn_arity == PN_LIST);
|
|
pn_head = nullptr;
|
|
pn_tail = &pn_head;
|
|
pn_count = 0;
|
|
pn_xflags = 0;
|
|
}
|
|
|
|
void initList(ParseNode* pn) {
|
|
MOZ_ASSERT(pn_arity == PN_LIST);
|
|
if (pn->pn_pos.begin < pn_pos.begin)
|
|
pn_pos.begin = pn->pn_pos.begin;
|
|
pn_pos.end = pn->pn_pos.end;
|
|
pn_head = pn;
|
|
pn_tail = &pn->pn_next;
|
|
pn_count = 1;
|
|
pn_xflags = 0;
|
|
}
|
|
|
|
void append(ParseNode* pn) {
|
|
MOZ_ASSERT(pn_arity == PN_LIST);
|
|
MOZ_ASSERT(pn->pn_pos.begin >= pn_pos.begin);
|
|
pn_pos.end = pn->pn_pos.end;
|
|
*pn_tail = pn;
|
|
pn_tail = &pn->pn_next;
|
|
pn_count++;
|
|
}
|
|
|
|
void prepend(ParseNode* pn) {
|
|
MOZ_ASSERT(pn_arity == PN_LIST);
|
|
pn->pn_next = pn_head;
|
|
pn_head = pn;
|
|
if (pn_tail == &pn_head)
|
|
pn_tail = &pn->pn_next;
|
|
pn_count++;
|
|
}
|
|
|
|
void checkListConsistency()
|
|
#ifndef DEBUG
|
|
{}
|
|
#endif
|
|
;
|
|
|
|
enum AllowConstantObjects {
|
|
DontAllowObjects = 0,
|
|
AllowObjects,
|
|
ForCopyOnWriteArray
|
|
};
|
|
|
|
MOZ_MUST_USE bool getConstantValue(ExclusiveContext* cx, AllowConstantObjects allowObjects,
|
|
MutableHandleValue vp, Value* compare = nullptr,
|
|
size_t ncompare = 0, NewObjectKind newKind = TenuredObject);
|
|
inline bool isConstant();
|
|
|
|
template <class NodeType>
|
|
inline bool is() const {
|
|
return NodeType::test(*this);
|
|
}
|
|
|
|
/* Casting operations. */
|
|
template <class NodeType>
|
|
inline NodeType& as() {
|
|
MOZ_ASSERT(NodeType::test(*this));
|
|
return *static_cast<NodeType*>(this);
|
|
}
|
|
|
|
template <class NodeType>
|
|
inline const NodeType& as() const {
|
|
MOZ_ASSERT(NodeType::test(*this));
|
|
return *static_cast<const NodeType*>(this);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump();
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct NullaryNode : public ParseNode
|
|
{
|
|
NullaryNode(ParseNodeKind kind, const TokenPos& pos)
|
|
: ParseNode(kind, JSOP_NOP, PN_NULLARY, pos) {}
|
|
NullaryNode(ParseNodeKind kind, JSOp op, const TokenPos& pos)
|
|
: ParseNode(kind, op, PN_NULLARY, pos) {}
|
|
|
|
// This constructor is for a few mad uses in the emitter. It populates
|
|
// the pn_atom field even though that field belongs to a branch in pn_u
|
|
// that nullary nodes shouldn't use -- bogus.
|
|
NullaryNode(ParseNodeKind kind, JSOp op, const TokenPos& pos, JSAtom* atom)
|
|
: ParseNode(kind, op, PN_NULLARY, pos)
|
|
{
|
|
pn_atom = atom;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump();
|
|
#endif
|
|
};
|
|
|
|
struct UnaryNode : public ParseNode
|
|
{
|
|
UnaryNode(ParseNodeKind kind, JSOp op, const TokenPos& pos, ParseNode* kid)
|
|
: ParseNode(kind, op, PN_UNARY, pos)
|
|
{
|
|
pn_kid = kid;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct BinaryNode : public ParseNode
|
|
{
|
|
BinaryNode(ParseNodeKind kind, JSOp op, const TokenPos& pos, ParseNode* left, ParseNode* right)
|
|
: ParseNode(kind, op, PN_BINARY, pos)
|
|
{
|
|
pn_left = left;
|
|
pn_right = right;
|
|
}
|
|
|
|
BinaryNode(ParseNodeKind kind, JSOp op, ParseNode* left, ParseNode* right)
|
|
: ParseNode(kind, op, PN_BINARY, TokenPos::box(left->pn_pos, right->pn_pos))
|
|
{
|
|
pn_left = left;
|
|
pn_right = right;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct TernaryNode : public ParseNode
|
|
{
|
|
TernaryNode(ParseNodeKind kind, JSOp op, ParseNode* kid1, ParseNode* kid2, ParseNode* kid3)
|
|
: ParseNode(kind, op, PN_TERNARY,
|
|
TokenPos((kid1 ? kid1 : kid2 ? kid2 : kid3)->pn_pos.begin,
|
|
(kid3 ? kid3 : kid2 ? kid2 : kid1)->pn_pos.end))
|
|
{
|
|
pn_kid1 = kid1;
|
|
pn_kid2 = kid2;
|
|
pn_kid3 = kid3;
|
|
}
|
|
|
|
TernaryNode(ParseNodeKind kind, JSOp op, ParseNode* kid1, ParseNode* kid2, ParseNode* kid3,
|
|
const TokenPos& pos)
|
|
: ParseNode(kind, op, PN_TERNARY, pos)
|
|
{
|
|
pn_kid1 = kid1;
|
|
pn_kid2 = kid2;
|
|
pn_kid3 = kid3;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct ListNode : public ParseNode
|
|
{
|
|
ListNode(ParseNodeKind kind, const TokenPos& pos)
|
|
: ParseNode(kind, JSOP_NOP, PN_LIST, pos)
|
|
{
|
|
makeEmpty();
|
|
}
|
|
|
|
ListNode(ParseNodeKind kind, JSOp op, const TokenPos& pos)
|
|
: ParseNode(kind, op, PN_LIST, pos)
|
|
{
|
|
makeEmpty();
|
|
}
|
|
|
|
ListNode(ParseNodeKind kind, JSOp op, ParseNode* kid)
|
|
: ParseNode(kind, op, PN_LIST, kid->pn_pos)
|
|
{
|
|
initList(kid);
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
return node.isArity(PN_LIST);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct CodeNode : public ParseNode
|
|
{
|
|
CodeNode(ParseNodeKind kind, JSOp op, const TokenPos& pos)
|
|
: ParseNode(kind, op, PN_CODE, pos)
|
|
{
|
|
MOZ_ASSERT(kind == PNK_FUNCTION || kind == PNK_MODULE);
|
|
MOZ_ASSERT_IF(kind == PNK_MODULE, op == JSOP_NOP);
|
|
MOZ_ASSERT(op == JSOP_NOP || // statement, module
|
|
op == JSOP_LAMBDA_ARROW || // arrow function
|
|
op == JSOP_LAMBDA); // expression, method, comprehension, accessor, &c.
|
|
MOZ_ASSERT(!pn_body);
|
|
MOZ_ASSERT(!pn_objbox);
|
|
}
|
|
|
|
public:
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct NameNode : public ParseNode
|
|
{
|
|
NameNode(ParseNodeKind kind, JSOp op, JSAtom* atom, const TokenPos& pos)
|
|
: ParseNode(kind, op, PN_NAME, pos)
|
|
{
|
|
pn_atom = atom;
|
|
pn_expr = nullptr;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
struct LexicalScopeNode : public ParseNode
|
|
{
|
|
LexicalScopeNode(LexicalScope::Data* bindings, ParseNode* body)
|
|
: ParseNode(PNK_LEXICALSCOPE, JSOP_NOP, PN_SCOPE, body->pn_pos)
|
|
{
|
|
pn_u.scope.bindings = bindings;
|
|
pn_u.scope.body = body;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
return node.isKind(PNK_LEXICALSCOPE);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void dump(int indent);
|
|
#endif
|
|
};
|
|
|
|
class LabeledStatement : public ParseNode
|
|
{
|
|
public:
|
|
LabeledStatement(PropertyName* label, ParseNode* stmt, uint32_t begin)
|
|
: ParseNode(PNK_LABEL, JSOP_NOP, PN_NAME, TokenPos(begin, stmt->pn_pos.end))
|
|
{
|
|
pn_atom = label;
|
|
pn_expr = stmt;
|
|
}
|
|
|
|
PropertyName* label() const {
|
|
return pn_atom->asPropertyName();
|
|
}
|
|
|
|
ParseNode* statement() const {
|
|
return pn_expr;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_LABEL);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NAME));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
// Inside a switch statement, a CaseClause is a case-label and the subsequent
|
|
// statements. The same node type is used for DefaultClauses. The only
|
|
// difference is that their caseExpression() is null.
|
|
class CaseClause : public BinaryNode
|
|
{
|
|
public:
|
|
CaseClause(ParseNode* expr, ParseNode* stmts, uint32_t begin)
|
|
: BinaryNode(PNK_CASE, JSOP_NOP, TokenPos(begin, stmts->pn_pos.end), expr, stmts) {}
|
|
|
|
ParseNode* caseExpression() const { return pn_left; }
|
|
bool isDefault() const { return !caseExpression(); }
|
|
ParseNode* statementList() const { return pn_right; }
|
|
|
|
// The next CaseClause in the same switch statement.
|
|
CaseClause* next() const { return pn_next ? &pn_next->as<CaseClause>() : nullptr; }
|
|
|
|
// Scratch space used by the emitter.
|
|
uint32_t offset() const { return pn_u.binary.offset; }
|
|
void setOffset(uint32_t u) { pn_u.binary.offset = u; }
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CASE);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_BINARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class LoopControlStatement : public ParseNode
|
|
{
|
|
protected:
|
|
LoopControlStatement(ParseNodeKind kind, PropertyName* label, const TokenPos& pos)
|
|
: ParseNode(kind, JSOP_NOP, PN_NULLARY, pos)
|
|
{
|
|
MOZ_ASSERT(kind == PNK_BREAK || kind == PNK_CONTINUE);
|
|
pn_u.loopControl.label = label;
|
|
}
|
|
|
|
public:
|
|
/* Label associated with this break/continue statement, if any. */
|
|
PropertyName* label() const {
|
|
return pn_u.loopControl.label;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_BREAK) || node.isKind(PNK_CONTINUE);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NULLARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class BreakStatement : public LoopControlStatement
|
|
{
|
|
public:
|
|
BreakStatement(PropertyName* label, const TokenPos& pos)
|
|
: LoopControlStatement(PNK_BREAK, label, pos)
|
|
{ }
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_BREAK);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NULLARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class ContinueStatement : public LoopControlStatement
|
|
{
|
|
public:
|
|
ContinueStatement(PropertyName* label, const TokenPos& pos)
|
|
: LoopControlStatement(PNK_CONTINUE, label, pos)
|
|
{ }
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CONTINUE);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NULLARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class DebuggerStatement : public ParseNode
|
|
{
|
|
public:
|
|
explicit DebuggerStatement(const TokenPos& pos)
|
|
: ParseNode(PNK_DEBUGGER, JSOP_NOP, PN_NULLARY, pos)
|
|
{ }
|
|
};
|
|
|
|
class ConditionalExpression : public ParseNode
|
|
{
|
|
public:
|
|
ConditionalExpression(ParseNode* condition, ParseNode* thenExpr, ParseNode* elseExpr)
|
|
: ParseNode(PNK_CONDITIONAL, JSOP_NOP, PN_TERNARY,
|
|
TokenPos(condition->pn_pos.begin, elseExpr->pn_pos.end))
|
|
{
|
|
MOZ_ASSERT(condition);
|
|
MOZ_ASSERT(thenExpr);
|
|
MOZ_ASSERT(elseExpr);
|
|
pn_u.ternary.kid1 = condition;
|
|
pn_u.ternary.kid2 = thenExpr;
|
|
pn_u.ternary.kid3 = elseExpr;
|
|
}
|
|
|
|
ParseNode& condition() const {
|
|
return *pn_u.ternary.kid1;
|
|
}
|
|
|
|
ParseNode& thenExpression() const {
|
|
return *pn_u.ternary.kid2;
|
|
}
|
|
|
|
ParseNode& elseExpression() const {
|
|
return *pn_u.ternary.kid3;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CONDITIONAL);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_TERNARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_NOP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class ThisLiteral : public UnaryNode
|
|
{
|
|
public:
|
|
ThisLiteral(const TokenPos& pos, ParseNode* thisName)
|
|
: UnaryNode(PNK_THIS, JSOP_NOP, pos, thisName)
|
|
{ }
|
|
};
|
|
|
|
class NullLiteral : public ParseNode
|
|
{
|
|
public:
|
|
explicit NullLiteral(const TokenPos& pos) : ParseNode(PNK_NULL, JSOP_NULL, PN_NULLARY, pos) { }
|
|
};
|
|
|
|
class BooleanLiteral : public ParseNode
|
|
{
|
|
public:
|
|
BooleanLiteral(bool b, const TokenPos& pos)
|
|
: ParseNode(b ? PNK_TRUE : PNK_FALSE, b ? JSOP_TRUE : JSOP_FALSE, PN_NULLARY, pos)
|
|
{ }
|
|
};
|
|
|
|
class RegExpLiteral : public NullaryNode
|
|
{
|
|
public:
|
|
RegExpLiteral(ObjectBox* reobj, const TokenPos& pos)
|
|
: NullaryNode(PNK_REGEXP, JSOP_REGEXP, pos)
|
|
{
|
|
pn_objbox = reobj;
|
|
}
|
|
|
|
ObjectBox* objbox() const { return pn_objbox; }
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_REGEXP);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NULLARY));
|
|
MOZ_ASSERT_IF(match, node.isOp(JSOP_REGEXP));
|
|
return match;
|
|
}
|
|
};
|
|
|
|
class PropertyAccess : public ParseNode
|
|
{
|
|
public:
|
|
PropertyAccess(ParseNode* lhs, PropertyName* name, uint32_t begin, uint32_t end)
|
|
: ParseNode(PNK_DOT, JSOP_NOP, PN_NAME, TokenPos(begin, end))
|
|
{
|
|
MOZ_ASSERT(lhs != nullptr);
|
|
MOZ_ASSERT(name != nullptr);
|
|
pn_u.name.expr = lhs;
|
|
pn_u.name.atom = name;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_DOT);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_NAME));
|
|
return match;
|
|
}
|
|
|
|
ParseNode& expression() const {
|
|
return *pn_u.name.expr;
|
|
}
|
|
|
|
PropertyName& name() const {
|
|
return *pn_u.name.atom->asPropertyName();
|
|
}
|
|
|
|
bool isSuper() const {
|
|
// PNK_SUPERBASE cannot result from any expression syntax.
|
|
return expression().isKind(PNK_SUPERBASE);
|
|
}
|
|
};
|
|
|
|
class PropertyByValue : public ParseNode
|
|
{
|
|
public:
|
|
PropertyByValue(ParseNode* lhs, ParseNode* propExpr, uint32_t begin, uint32_t end)
|
|
: ParseNode(PNK_ELEM, JSOP_NOP, PN_BINARY, TokenPos(begin, end))
|
|
{
|
|
pn_u.binary.left = lhs;
|
|
pn_u.binary.right = propExpr;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_ELEM);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_BINARY));
|
|
return match;
|
|
}
|
|
|
|
bool isSuper() const {
|
|
return pn_left->isKind(PNK_SUPERBASE);
|
|
}
|
|
};
|
|
|
|
/*
|
|
* A CallSiteNode represents the implicit call site object argument in a TaggedTemplate.
|
|
*/
|
|
struct CallSiteNode : public ListNode {
|
|
explicit CallSiteNode(uint32_t begin): ListNode(PNK_CALLSITEOBJ, TokenPos(begin, begin + 1)) {}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
return node.isKind(PNK_CALLSITEOBJ);
|
|
}
|
|
|
|
MOZ_MUST_USE bool getRawArrayValue(ExclusiveContext* cx, MutableHandleValue vp) {
|
|
return pn_head->getConstantValue(cx, AllowObjects, vp);
|
|
}
|
|
};
|
|
|
|
struct ClassMethod : public BinaryNode {
|
|
/*
|
|
* Method defintions often keep a name and function body that overlap,
|
|
* so explicitly define the beginning and end here.
|
|
*/
|
|
ClassMethod(ParseNode* name, ParseNode* body, JSOp op, bool isStatic)
|
|
: BinaryNode(PNK_CLASSMETHOD, op, TokenPos(name->pn_pos.begin, body->pn_pos.end), name, body)
|
|
{
|
|
pn_u.binary.isStatic = isStatic;
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CLASSMETHOD);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_BINARY));
|
|
return match;
|
|
}
|
|
|
|
ParseNode& name() const {
|
|
return *pn_u.binary.left;
|
|
}
|
|
ParseNode& method() const {
|
|
return *pn_u.binary.right;
|
|
}
|
|
bool isStatic() const {
|
|
return pn_u.binary.isStatic;
|
|
}
|
|
};
|
|
|
|
struct ClassNames : public BinaryNode {
|
|
ClassNames(ParseNode* outerBinding, ParseNode* innerBinding, const TokenPos& pos)
|
|
: BinaryNode(PNK_CLASSNAMES, JSOP_NOP, pos, outerBinding, innerBinding)
|
|
{
|
|
MOZ_ASSERT_IF(outerBinding, outerBinding->isKind(PNK_NAME));
|
|
MOZ_ASSERT(innerBinding->isKind(PNK_NAME));
|
|
MOZ_ASSERT_IF(outerBinding, innerBinding->pn_atom == outerBinding->pn_atom);
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CLASSNAMES);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_BINARY));
|
|
return match;
|
|
}
|
|
|
|
/*
|
|
* Classes require two definitions: The first "outer" binding binds the
|
|
* class into the scope in which it was declared. the outer binding is a
|
|
* mutable lexial binding. The second "inner" binding binds the class by
|
|
* name inside a block in which the methods are evaulated. It is immutable,
|
|
* giving the methods access to the static members of the class even if
|
|
* the outer binding has been overwritten.
|
|
*/
|
|
ParseNode* outerBinding() const {
|
|
return pn_u.binary.left;
|
|
}
|
|
ParseNode* innerBinding() const {
|
|
return pn_u.binary.right;
|
|
}
|
|
};
|
|
|
|
struct ClassNode : public TernaryNode {
|
|
ClassNode(ParseNode* names, ParseNode* heritage, ParseNode* methodsOrBlock)
|
|
: TernaryNode(PNK_CLASS, JSOP_NOP, names, heritage, methodsOrBlock)
|
|
{
|
|
MOZ_ASSERT_IF(names, names->is<ClassNames>());
|
|
MOZ_ASSERT(methodsOrBlock->is<LexicalScopeNode>() ||
|
|
methodsOrBlock->isKind(PNK_CLASSMETHODLIST));
|
|
}
|
|
|
|
static bool test(const ParseNode& node) {
|
|
bool match = node.isKind(PNK_CLASS);
|
|
MOZ_ASSERT_IF(match, node.isArity(PN_TERNARY));
|
|
return match;
|
|
}
|
|
|
|
ClassNames* names() const {
|
|
return pn_kid1 ? &pn_kid1->as<ClassNames>() : nullptr;
|
|
}
|
|
ParseNode* heritage() const {
|
|
return pn_kid2;
|
|
}
|
|
ParseNode* methodList() const {
|
|
if (pn_kid3->isKind(PNK_CLASSMETHODLIST))
|
|
return pn_kid3;
|
|
|
|
MOZ_ASSERT(pn_kid3->is<LexicalScopeNode>());
|
|
ParseNode* list = pn_kid3->scopeBody();
|
|
MOZ_ASSERT(list->isKind(PNK_CLASSMETHODLIST));
|
|
return list;
|
|
}
|
|
Handle<LexicalScope::Data*> scopeBindings() const {
|
|
MOZ_ASSERT(pn_kid3->is<LexicalScopeNode>());
|
|
return pn_kid3->scopeBindings();
|
|
}
|
|
};
|
|
|
|
#ifdef DEBUG
|
|
void DumpParseTree(ParseNode* pn, int indent = 0);
|
|
#endif
|
|
|
|
class ParseNodeAllocator
|
|
{
|
|
public:
|
|
explicit ParseNodeAllocator(ExclusiveContext* cx, LifoAlloc& alloc)
|
|
: cx(cx), alloc(alloc), freelist(nullptr)
|
|
{}
|
|
|
|
void* allocNode();
|
|
void freeNode(ParseNode* pn);
|
|
ParseNode* freeTree(ParseNode* pn);
|
|
void prepareNodeForMutation(ParseNode* pn);
|
|
|
|
private:
|
|
ExclusiveContext* cx;
|
|
LifoAlloc& alloc;
|
|
ParseNode* freelist;
|
|
};
|
|
|
|
inline bool
|
|
ParseNode::isConstant()
|
|
{
|
|
switch (pn_type) {
|
|
case PNK_NUMBER:
|
|
case PNK_STRING:
|
|
case PNK_TEMPLATE_STRING:
|
|
case PNK_NULL:
|
|
case PNK_FALSE:
|
|
case PNK_TRUE:
|
|
return true;
|
|
case PNK_ARRAY:
|
|
case PNK_OBJECT:
|
|
MOZ_ASSERT(isOp(JSOP_NEWINIT));
|
|
return !(pn_xflags & PNX_NONCONST);
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
class ObjectBox
|
|
{
|
|
public:
|
|
JSObject* object;
|
|
|
|
ObjectBox(JSObject* object, ObjectBox* traceLink);
|
|
bool isFunctionBox() { return object->is<JSFunction>(); }
|
|
FunctionBox* asFunctionBox();
|
|
virtual void trace(JSTracer* trc);
|
|
|
|
static void TraceList(JSTracer* trc, ObjectBox* listHead);
|
|
|
|
protected:
|
|
friend struct CGObjectList;
|
|
|
|
ObjectBox* traceLink;
|
|
ObjectBox* emitLink;
|
|
|
|
ObjectBox(JSFunction* function, ObjectBox* traceLink);
|
|
};
|
|
|
|
enum ParseReportKind
|
|
{
|
|
ParseError,
|
|
ParseWarning,
|
|
ParseExtraWarning,
|
|
ParseStrictError
|
|
};
|
|
|
|
enum FunctionSyntaxKind
|
|
{
|
|
Expression,
|
|
Statement,
|
|
Arrow,
|
|
Method,
|
|
ClassConstructor,
|
|
DerivedClassConstructor,
|
|
Getter,
|
|
GetterNoExpressionClosure,
|
|
Setter,
|
|
SetterNoExpressionClosure
|
|
};
|
|
|
|
static inline bool
|
|
IsConstructorKind(FunctionSyntaxKind kind)
|
|
{
|
|
return kind == ClassConstructor || kind == DerivedClassConstructor;
|
|
}
|
|
|
|
static inline bool
|
|
IsGetterKind(FunctionSyntaxKind kind)
|
|
{
|
|
return kind == Getter || kind == GetterNoExpressionClosure;
|
|
}
|
|
|
|
static inline bool
|
|
IsSetterKind(FunctionSyntaxKind kind)
|
|
{
|
|
return kind == Setter || kind == SetterNoExpressionClosure;
|
|
}
|
|
|
|
static inline bool
|
|
IsMethodDefinitionKind(FunctionSyntaxKind kind)
|
|
{
|
|
return kind == Method || IsConstructorKind(kind) ||
|
|
IsGetterKind(kind) || IsSetterKind(kind);
|
|
}
|
|
|
|
static inline ParseNode*
|
|
FunctionFormalParametersList(ParseNode* fn, unsigned* numFormals)
|
|
{
|
|
MOZ_ASSERT(fn->isKind(PNK_FUNCTION));
|
|
ParseNode* argsBody = fn->pn_body;
|
|
MOZ_ASSERT(argsBody->isKind(PNK_PARAMSBODY));
|
|
*numFormals = argsBody->pn_count;
|
|
if (*numFormals > 0 &&
|
|
argsBody->last()->isKind(PNK_LEXICALSCOPE) &&
|
|
argsBody->last()->scopeBody()->isKind(PNK_STATEMENTLIST))
|
|
{
|
|
(*numFormals)--;
|
|
}
|
|
MOZ_ASSERT(argsBody->isArity(PN_LIST));
|
|
return argsBody->pn_head;
|
|
}
|
|
|
|
bool
|
|
IsAnonymousFunctionDefinition(ParseNode* pn);
|
|
|
|
} /* namespace frontend */
|
|
} /* namespace js */
|
|
|
|
#endif /* frontend_ParseNode_h */
|