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grammar.y
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/*
* grammar.y -- Bison/YACC parser definition for an EcmaScript
*
* Copyright (c) 2012-2017 Nick Reynolds
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
%{
#include <unistd.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <getopt.h>
#include <setjmp.h>
#ifndef FH_NO_REPL
#include <readline/readline.h>
#include <readline/history.h>
#endif
#include "lex.yy.h"
#include "src/flathead.h"
#include "src/nodes.h"
#include "src/eval.h"
#include "src/runtime/runtime.h"
#include "src/debug.h"
#include "src/cli.h"
#define YYDEBUG 0
// The `ast_node` struct is used to build the AST. Each has slots for three
// child nodes, a double, a string, and an identifying type. To keep things
// generic, this struct is used throughout. The macros below offer a little
// more clarity and serve as reference to the locations of child nodes and
// values on a particular type of struct.
#define NEW_NODE(t,e1,e2,e3,d,s) node_new(t,e1,e2,e3,d,s,yylloc.first_line,yylloc.first_column)
#define NEW_ARGLST(head,tail) NEW_NODE(NODE_ARG_LST,head,tail,0,0,0)
#define NEW_ARR(ellst) NEW_NODE(NODE_ARR,ellst,0,0,0,0)
#define NEW_ASGN(a,b,op) NEW_NODE(NODE_ASGN,a,b,0,0,op)
#define NEW_BLOCK(stmtlst) NEW_NODE(NODE_BLOCK,stmtlst,0,0,0,0)
#define NEW_BOOL(x) NEW_NODE(NODE_BOOL,0,0,0,x,0)
#define NEW_BREAK() NEW_NODE(NODE_BREAK,0,0,0,0,0)
#define NEW_CALL(call,args) NEW_NODE(NODE_CALL,call,args,0,0,0);
#define NEW_CASEBLOCK(c1,def,c2) NEW_NODE(NODE_CASE_BLOCK,c1,def,c2,0,0)
#define NEW_CATCH(id,block) NEW_NODE(NODE_CATCH,id,block,0,0,0)
#define NEW_CLAUSE(exp,stmtlst) NEW_NODE(NODE_CLAUSE,exp,stmtlst,0,0,0)
#define NEW_CLAUSELST(head,tail) NEW_NODE(NODE_CLAUSE_LST,head,tail,0,0,0)
#define NEW_CONT() NEW_NODE(NODE_CONT,0,0,0,0,0)
#define NEW_DEBUGGER() NEW_NODE(NODE_DEBUG_STMT,0,0,0,0,0)
#define NEW_DOWHILE(cnd,blck) NEW_NODE(NODE_DOWHILE,cnd,blck,0,0,0)
#define NEW_ELISION() NEW_NODE(NODE_ELISION,0,0,0,0,0)
#define NEW_ELLST(head,tail) NEW_NODE(NODE_EL_LST,head,tail,0,0,0)
#define NEW_EMPTSTMT() NEW_NODE(NODE_EMPT_STMT,0,0,0,0,0)
#define NEW_EXP(a,b,op) NEW_NODE(NODE_EXP,a,b,0,0,op)
#define NEW_EXPGRP(e1,e2,e3) NEW_NODE(NODE_EXPGRP,e1,e2,e3,0,0)
#define NEW_EXPSTMT(exp) NEW_NODE(NODE_EXP_STMT,exp,0,0,0,0)
#define NEW_FINALLY(block) NEW_NODE(NODE_FINALLY,block,0,0,0,0)
#define NEW_FOR(exps,stmt) NEW_NODE(NODE_FOR,exps,stmt,0,0,0)
#define NEW_FORIN(lhs,in,stmt) NEW_NODE(NODE_FORIN,lhs,in,stmt,0,0)
#define NEW_FUNC(params,body,id) NEW_NODE(NODE_FUNC,params,body,id,0,0)
#define NEW_IDENT(name) NEW_NODE(NODE_IDENT,0,0,0,0,name)
#define NEW_IF(p,q,r) NEW_NODE(NODE_IF,p,q,r,0,0)
#define NEW_MEMBER(head,tail,exp) NEW_NODE(NODE_MEMBER,head,tail,0,exp,0)
#define NEW_NEW(exp) NEW_NODE(NODE_NEW,exp,0,0,0,0);
#define NEW_NULL() NEW_NODE(NODE_NULL,0,0,0,0,0)
#define NEW_NUM(x) NEW_NODE(NODE_NUM,0,0,0,x,0)
#define NEW_OBJ(proplst) NEW_NODE(NODE_OBJ,proplst,0,0,0,0)
#define NEW_PARAMLST(head,tail) NEW_NODE(NODE_PARAM_LST,head,tail,0,0,0)
#define NEW_PROP(name,exp) NEW_NODE(NODE_PROP,name,exp,0,0,0)
#define NEW_PROPLST(head,tail) NEW_NODE(NODE_PROP_LST,head,tail,0,0,0)
#define NEW_REGEXP(x) NEW_NODE(NODE_REGEXP,0,0,0,0,x)
#define NEW_RETURN(exp) NEW_NODE(NODE_RETURN,exp,0,0,0,0)
#define NEW_SRCLST(head,tail) NEW_NODE(NODE_SRC_LST,head,tail,0,0,0)
#define NEW_STMTLST(head,tail) NEW_NODE(NODE_STMT_LST,head,tail,0,0,0)
#define NEW_STR(x) NEW_NODE(NODE_STR,0,0,0,0,x)
#define NEW_SWITCH(exp,cases) NEW_NODE(NODE_SWITCH_STMT,exp,cases,0,0,0)
#define NEW_TERN(p,q,r) NEW_NODE(NODE_TERN,p,q,r,0,0)
#define NEW_THIS() NEW_NODE(NODE_THIS,0,0,0,0,0)
#define NEW_THROW(exp) NEW_NODE(NODE_THROW,exp,0,0,0,0)
#define NEW_TRY(block,catch,final) NEW_NODE(NODE_TRY_STMT,block,catch,final,0,0)
#define NEW_UNPOST(a,op) NEW_NODE(NODE_UNARY_POST,a,0,0,0,op)
#define NEW_UNPRE(a,op) NEW_NODE(NODE_UNARY_PRE,a,0,0,0,op)
#define NEW_VARDEC(id,exp) NEW_NODE(NODE_VAR_DEC,id,exp,0,0,0)
#define NEW_VARDECLST(head,tail) NEW_NODE(NODE_VAR_DEC_LST,head,tail,0,0,0)
#define NEW_VARSTMT(declst) NEW_NODE(NODE_VAR_STMT,declst,0,0,0,0)
#define NEW_WHILE(cnd,blck) NEW_NODE(NODE_WHILE,cnd,blck,0,0,0)
#define NEW_WITH(exp,stmt) NEW_NODE(NODE_WITH_STMT,exp,stmt,0,0,0)
void yyerror(const char *);
int yycolumn;
int yydebug;
int fh_get_input(char *, int);
ast_node *root;
eval_state *state;
fh_state *fh;
%}
%error-verbose
%locations
/* LITERALS */
%token<floatval> NUMBER
%token<val> IDENT STRING REGEXP TRUE FALSE
/* OPERATORS */
%token<val> AND OR
%token<val> PLUSPLUS MINUSMINUS VOID DELETE TYPEOF
%token<val> EQEQ GTE LTE NE STEQ STNE INSTANCEOF
%token<val> LSHIFT RSHIFT URSHIFT
%token<val> PLUSEQ MINUSEQ MULTEQ DIVEQ MODEQ
%token<val> LSHIFTEQ RSHIFTEQ URSHIFTEQ
%token<val> ANDEQ XOREQ OREQ
/* KEYWORDS */
%token<val> WHILE DO FOR
%token<val> IF ELSE
%token<val> BREAK CONTINUE RETURNT THROW
%token<val> VAR IN THIS NULLT FUNCTION NEW WITH DEBUGGER
%token<val> SWITCH CASE DEFAULT
%token<val> TRY CATCH FINALLY
/* ASSOCIATIVITY */
%left '+' '-' '*' '%' '/' AND OR
%union {
char *val;
int intval;
double floatval;
struct ast_node *node;
}
%type<val> AssignmentOperator
%type<node> AdditiveExpression
%type<node> AdditiveExpressionNoFn
%type<node> AnonymousFunction
%type<node> ArgumentList
%type<node> Arguments
%type<node> ArrayLiteral
%type<node> AssignmentExpression
%type<node> AssignmentExpressionNoIn
%type<node> AssignmentExpressionNoFn
%type<node> BitwiseANDExpression
%type<node> BitwiseANDExpressionNoIn
%type<node> BitwiseANDExpressionNoFn
%type<node> BitwiseORExpression
%type<node> BitwiseORExpressionNoIn
%type<node> BitwiseORExpressionNoFn
%type<node> BitwiseXORExpression
%type<node> BitwiseXORExpressionNoIn
%type<node> BitwiseXORExpressionNoFn
%type<node> Block
%type<node> BooleanLiteral
%type<node> BreakStatement
%type<node> CallExpression
%type<node> CallExpressionNoFn
%type<node> CaseBlock
%type<node> CaseClause
%type<node> CaseClauses
%type<node> Catch
%type<node> ConditionalExpression
%type<node> ConditionalExpressionNoIn
%type<node> ConditionalExpressionNoFn
%type<node> ContinueStatement
%type<node> DebuggerStatement
%type<node> DefaultClause
%type<node> ElementList
%type<node> Elision
%type<node> EmptyStatement
%type<node> EqualityExpression
%type<node> EqualityExpressionNoIn
%type<node> EqualityExpressionNoFn
%type<node> Expression
%type<node> ExpressionNoIn
%type<node> ExpressionNoFn
%type<node> ExpressionStatement
%type<node> Finally
%type<node> FormalParameterList
%type<node> FunctionBody
%type<node> FunctionDeclaration
%type<node> FunctionExpression
%type<node> Identifier
%type<node> IfStatement
%type<node> Initializer
%type<node> InitializerNoIn
%type<node> IterationStatement
%type<node> LeftHSExpression
%type<node> LeftHSExpressionNoFn
%type<node> Literal
%type<node> LiteralNoObj
%type<node> LogicalANDExpression
%type<node> LogicalANDExpressionNoIn
%type<node> LogicalANDExpressionNoFn
%type<node> LogicalORExpression
%type<node> LogicalORExpressionNoIn
%type<node> LogicalORExpressionNoFn
%type<node> MemberExpression
%type<node> MemberExpressionNoFn
%type<node> MultiExpression
%type<node> MultiExpressionNoFn
%type<node> NamedFunction
%type<node> NewExpression
%type<node> NewExpressionNoFn
%type<node> NullLiteral
%type<node> NumericLiteral
%type<node> ObjectLiteral
%type<node> PostfixExpression
%type<node> PostfixExpressionNoFn
%type<node> PrimaryExpression
%type<node> PrimaryExpressionNoObj
%type<node> Program
%type<node> PropertyAssignment
%type<node> PropertyName
%type<node> PropertyNameAndValueList
%type<node> RegularExpressionLiteral
%type<node> RelationalExpression
%type<node> RelationalExpressionNoIn
%type<node> RelationalExpressionNoFn
%type<node> ReturnStatement
%type<node> ShiftExpression
%type<node> ShiftExpressionNoFn
%type<node> SourceElement
%type<node> SourceElements
%type<node> Statement
%type<node> StatementList
%type<node> StringLiteral
%type<node> SwitchStatement
%type<node> ThrowStatement
%type<node> TryStatement
%type<node> UnaryExpression
%type<node> UnaryExpressionNoFn
%type<node> VariableDecList
%type<node> VariableDecListNoIn
%type<node> VariableDeclaration
%type<node> VariableDeclarationNoIn
%type<node> VariableStatement
%type<node> WithStatement
/* 'NoIn' variants are used to differentiate between the 'in' operatior in a
* relational expression and the 'in' operator in a for-statement.
* (see Ecma-262 11.8)
*
* 'NoFn' variants are used to make the distinction between a function
* declaration and a named function expression. Expression statements cannot
* begin with the 'function' keyword (Ecma-262 12.4). These productions
* prevent that.
*
* 'NoObj' rides the 'NoFn' train, forking at 'MemberExpressionNoFn' to ensure
* that 'PrimaryExpression' cannot be an object literal. Like the function
* declaration and expression, object literals must be disambiguated from
* blocks, and therefore may not be used to start an expression statement
* (Ecma-262 12.4).
*/
%%
Program : SourceElements
{ root = $1; }
;
SourceElements : SourceElement
{ $$ = NEW_SRCLST($1, NULL); }
| SourceElements SourceElement
{ $$ = NEW_SRCLST($2, $1); }
;
SourceElement : Statement
{ $$ = $1; }
| FunctionDeclaration
{ $$ = $1; }
;
Statement : Block
{ $$ = $1; }
| VariableStatement
{ $$ = $1; }
| EmptyStatement
{ $$ = $1; }
| ExpressionStatement
{ $$ = $1; }
| IfStatement
{ $$ = $1; }
| IterationStatement
{ $$ = $1; }
| ContinueStatement
{ $$ = $1; }
| BreakStatement
{ $$ = $1; }
| ReturnStatement
{ $$ = $1; }
| ThrowStatement
{ $$ = $1; }
| TryStatement
{ $$ = $1; }
| WithStatement
{ $$ = $1; }
| SwitchStatement
{ $$ = $1; }
| DebuggerStatement
{ $$ = $1; }
;
Block : '{' '}'
{ $$ = NEW_BLOCK(NULL); }
| '{' StatementList '}'
{ $$ = NEW_BLOCK($2); }
;
StatementList : Statement
{ $$ = NEW_STMTLST($1, NULL); }
| StatementList Statement
{ $$ = NEW_STMTLST($2, $1); }
;
VariableStatement : VAR VariableDecList ';'
{ $$ = NEW_VARSTMT($2); }
;
VariableDecList : VariableDeclaration
{ $$ = NEW_VARDECLST($1, NULL); }
| VariableDecList ',' VariableDeclaration
{ $$ = NEW_VARDECLST($3, $1); }
;
VariableDecListNoIn : VariableDeclarationNoIn
{ $$ = NEW_VARDECLST($1, NULL); }
| VariableDecListNoIn ',' VariableDeclarationNoIn
{ $$ = NEW_VARDECLST($3, $1); }
;
VariableDeclaration : Identifier Initializer
{ $$ = NEW_VARDEC($1, $2); }
| Identifier
{ $$ = NEW_VARDEC($1, NULL); }
;
VariableDeclarationNoIn : Identifier InitializerNoIn
{ $$ = NEW_VARDEC($1, $2); }
| Identifier
{ $$ = NEW_VARDEC($1, NULL); }
;
Initializer : '=' AssignmentExpression
{ $$ = $2; }
;
InitializerNoIn : '=' AssignmentExpressionNoIn
{ $$ = $2; }
;
EmptyStatement : ';'
{ $$ = NEW_EMPTSTMT(); }
;
ExpressionStatement : ExpressionNoFn ';'
{ $$ = NEW_EXPSTMT($1); }
;
IfStatement : IF '(' Expression ')' Statement ELSE Statement
{ $$ = NEW_IF($3, $5, $7); }
| IF '(' Expression ')' Statement
{ $$ = NEW_IF($3, $5, NULL); }
;
IterationStatement : DO Statement WHILE '(' Expression ')' ';'
{ $$ = NEW_DOWHILE($2, $5); }
| WHILE '(' Expression ')' Statement
{ $$ = NEW_WHILE($3, $5); }
/* for ( LHS/VarDecl in Expression ) Statement */
| FOR '(' LeftHSExpression IN Expression ')' Statement
{ $$ = NEW_FORIN($3, $5, $7); }
| FOR '(' VAR VariableDeclarationNoIn IN Expression ')' Statement
{ $$ = NEW_FORIN($4, $6, $8); }
/* for ( Expression/VarDecl ; Expresion ; Expression ) Statement */
| FOR '(' ExpressionNoIn ';' Expression ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($3, $5, $7), $9); }
| FOR '(' VAR VariableDecListNoIn ';' Expression ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($4, $6, $8), $10); }
| FOR '(' ExpressionNoIn ';' Expression ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($3, $5, NULL), $8); }
| FOR '(' VAR VariableDecListNoIn ';' Expression ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($4, $6, NULL), $9); }
| FOR '(' ExpressionNoIn ';' ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($3, NULL, $6), $8); }
| FOR '(' VAR VariableDecListNoIn ';' ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($4, NULL, $7), $9); }
| FOR '(' ExpressionNoIn ';' ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($3, NULL, NULL), $7); }
| FOR '(' VAR VariableDecListNoIn ';' ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP($4, NULL, NULL), $8); }
| FOR '(' ';' Expression ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP(NULL, $4, $6), $8); }
| FOR '(' ';' Expression ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP(NULL, $4, NULL), $7); }
| FOR '(' ';' ';' Expression ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP(NULL, NULL, $5), $7); }
| FOR '(' ';' ';' ')' Statement
{ $$ = NEW_FOR(NEW_EXPGRP(NULL, NULL, NULL), $6); }
;
ContinueStatement : CONTINUE ';'
{ $$ = NEW_CONT(); }
;
BreakStatement : BREAK ';'
{ $$ = NEW_BREAK(); }
;
ReturnStatement : RETURNT ';'
{ $$ = NEW_RETURN(NULL); }
| RETURNT Expression ';'
{ $$ = NEW_RETURN($2); }
;
WithStatement : WITH '(' Expression ')' Statement
{ $$ = NEW_WITH($3, $5); }
;
TryStatement : TRY Block Catch
{ $$ = NEW_TRY($2, $3, NULL); }
| TRY Block Finally
{ $$ = NEW_TRY($2, NULL, $3); }
| TRY Block Catch Finally
{ $$ = NEW_TRY($2, $3, $4); }
;
Catch : CATCH '(' Identifier ')' Block
{ $$ = NEW_CATCH($3, $5); }
;
Finally : FINALLY Block
{ $$ = NEW_FINALLY($2); }
;
DebuggerStatement : DEBUGGER ';'
{ $$ = NEW_DEBUGGER(); }
;
ThrowStatement : THROW Expression ';'
{ $$ = NEW_THROW($2); }
;
SwitchStatement : SWITCH '(' Expression ')' CaseBlock
{ $$ = NEW_SWITCH($3, $5); }
;
CaseBlock : '{' CaseClauses '}'
{ $$ = NEW_CASEBLOCK($2, NULL, NULL); }
| '{' DefaultClause '}'
{ $$ = NEW_CASEBLOCK(NULL, $2, NULL); }
| '{' CaseClauses DefaultClause '}'
{ $$ = NEW_CASEBLOCK($2, $3, NULL); }
| '{' CaseClauses DefaultClause CaseClauses '}'
{ $$ = NEW_CASEBLOCK($2, $3, $4); }
;
CaseClauses : CaseClause
{ $$ = NEW_CLAUSELST($1, NULL); }
| CaseClauses CaseClause
{ $$ = NEW_CLAUSELST($2, $1); }
CaseClause : CASE Expression ':' StatementList
{ $$ = NEW_CLAUSE($2, $4); }
| CASE Expression ':'
{ $$ = NEW_CLAUSE($2, NULL); }
;
DefaultClause : DEFAULT ':' StatementList
{ $$ = NEW_CLAUSE(NULL, $3); }
| DEFAULT ':'
{ $$ = NEW_CLAUSE(NULL, NULL); }
;
Literal : NullLiteral
{ $$ = $1; }
| BooleanLiteral
{ $$ = $1; }
| NumericLiteral
{ $$ = $1; }
| StringLiteral
{ $$ = $1; }
| ObjectLiteral
{ $$ = $1; }
| RegularExpressionLiteral
{ $$ = $1; }
;
LiteralNoObj : NullLiteral
{ $$ = $1; }
| BooleanLiteral
{ $$ = $1; }
| NumericLiteral
{ $$ = $1; }
| StringLiteral
{ $$ = $1; }
| RegularExpressionLiteral
{ $$ = $1; }
;
ArrayLiteral : '[' ']'
{ $$ = NEW_ARR(NULL); }
| '[' Elision ']'
{ $$ = NEW_ARR(NULL); }
| '[' ElementList ']'
{ $$ = NEW_ARR($2); }
| '[' ElementList ',' ']'
{ $$ = NEW_ARR($2); }
| '[' ElementList ',' Elision ']'
{ $$ = NEW_ARR($2); }
;
Elision : ','
{ $$ = NEW_ELISION(); }
| Elision ','
{ $$ = NEW_ELISION(); }
;
ElementList : AssignmentExpression
{ $$ = NEW_ELLST($1, NULL); }
| Elision AssignmentExpression
{ $$ = NEW_ELLST($2, NULL); }
| ElementList ',' AssignmentExpression
{ $$ = NEW_ELLST($3, $1); }
| ElementList ',' Elision AssignmentExpression
{ $$ = NEW_ELLST($4, $1); }
;
BooleanLiteral : TRUE
{ $$ = NEW_BOOL(1); }
| FALSE
{ $$ = NEW_BOOL(0); }
;
StringLiteral : STRING
{ $$ = NEW_STR($1); }
;
NullLiteral : NULLT
{ $$ = NEW_NULL(); }
;
NumericLiteral : NUMBER
{ $$ = NEW_NUM($1); }
;
ObjectLiteral : '{' '}'
{ $$ = NEW_OBJ(NULL); }
| '{' PropertyNameAndValueList '}'
{ $$ = NEW_OBJ($2); }
| '{' PropertyNameAndValueList ',' '}'
{ $$ = NEW_OBJ($2); }
;
PropertyNameAndValueList : PropertyAssignment
{ $$ = NEW_PROPLST($1, NULL); }
| PropertyNameAndValueList ',' PropertyAssignment
{ $$ = NEW_PROPLST($3, $1); }
;
PropertyAssignment : PropertyName ':' AssignmentExpression
{ $$ = NEW_PROP($1, $3); }
;
PropertyName : Identifier
{ $$ = $1; }
| StringLiteral
{ $$ = $1; }
| NumericLiteral
{ $$ = $1; }
;
RegularExpressionLiteral : REGEXP
{ $$ = NEW_REGEXP($1); }
;
/* Whether a named function is a declaration or expression is ambiguous
here. We'll decide that on evaluation. */
NamedFunction : FUNCTION Identifier '(' FormalParameterList ')' '{' FunctionBody '}'
{ $$ = NEW_FUNC($4, $7, $2); }
| FUNCTION Identifier '(' ')' '{' FunctionBody '}'
{ $$ = NEW_FUNC(NULL, $6, $2); }
;
/* Anonymous functions, OTOH, can readily be labeled expressions. */
AnonymousFunction : FUNCTION '(' FormalParameterList ')' '{' FunctionBody '}'
{ $$ = NEW_FUNC($3, $6, NULL); }
| FUNCTION '(' ')' '{' FunctionBody '}'
{ $$ = NEW_FUNC(NULL, $5, NULL); }
;
FunctionDeclaration : NamedFunction
{ $$ = $1; }
;
FunctionExpression : NamedFunction
{ $$ = $1; }
| AnonymousFunction
{ $$ = $1; }
;
FormalParameterList : Identifier
{ $$ = NEW_PARAMLST($1, NULL); }
| FormalParameterList ',' Identifier
{ $$ = NEW_PARAMLST($3, $1); }
;
FunctionBody : SourceElements
{ $$ = $1; }
|
{ $$ = NULL; }
;
Identifier : IDENT
{ $$ = NEW_IDENT($1); }
;
PrimaryExpression : THIS
{ $$ = NEW_THIS(); }
| Identifier
{ $$ = $1; }
| Literal
{ $$ = $1; }
| ArrayLiteral
{ $$ = $1; }
| '(' Expression ')'
{ $$ = $2; }
;
PrimaryExpressionNoObj : THIS
{ $$ = NEW_THIS(); }
| Identifier
{ $$ = $1; }
| LiteralNoObj
{ $$ = $1; }
| ArrayLiteral
{ $$ = $1; }
| '(' Expression ')'
{ $$ = $2; }
;
ConditionalExpression : LogicalORExpression
{ $$ = $1; }
| LogicalORExpression '?' AssignmentExpression ':' AssignmentExpression
{ $$ = NEW_TERN($1, $3, $5); }
;
ConditionalExpressionNoIn: LogicalORExpressionNoIn
{ $$ = $1; }
| LogicalORExpressionNoIn '?' AssignmentExpression ':' AssignmentExpressionNoIn
{ $$ = NEW_TERN($1, $3, $5); }
;
ConditionalExpressionNoFn: LogicalORExpressionNoFn
{ $$ = $1; }
| LogicalORExpressionNoFn '?' AssignmentExpression ':' AssignmentExpression
{ $$ = NEW_TERN($1, $3, $5); }
;
LogicalORExpression : LogicalANDExpression
{ $$ = $1; }
| LogicalORExpression OR LogicalANDExpression
{ $$ = NEW_EXP($1, $3, "||"); }
;
LogicalORExpressionNoIn : LogicalANDExpressionNoIn
{ $$ = $1; }
| LogicalORExpressionNoIn OR LogicalANDExpressionNoIn
{ $$ = NEW_EXP($1, $3, "||"); }
;
LogicalORExpressionNoFn : LogicalANDExpressionNoFn
{ $$ = $1; }
| LogicalORExpressionNoFn OR LogicalANDExpression
{ $$ = NEW_EXP($1, $3, "||"); }
;
LogicalANDExpression : BitwiseORExpression
{ $$ = $1; }
| LogicalANDExpression AND BitwiseORExpression
{ $$ = NEW_EXP($1, $3, "&&"); }
;
LogicalANDExpressionNoIn : BitwiseORExpressionNoIn
{ $$ = $1; }
| LogicalANDExpressionNoIn AND BitwiseORExpressionNoIn
{ $$ = NEW_EXP($1, $3, "&&"); }
;
LogicalANDExpressionNoFn : BitwiseORExpressionNoFn
{ $$ = $1; }
| LogicalANDExpressionNoFn AND BitwiseORExpression
{ $$ = NEW_EXP($1, $3, "&&"); }
;
BitwiseORExpression : BitwiseXORExpression
{ $$ = $1; }
| BitwiseORExpression '|' BitwiseXORExpression
{ $$ = NEW_EXP($1, $3, "|"); }
;
BitwiseORExpressionNoIn : BitwiseXORExpressionNoIn
{ $$ = $1; }
| BitwiseORExpressionNoIn '|' BitwiseXORExpressionNoIn
{ $$ = NEW_EXP($1, $3, "|"); }
;
BitwiseORExpressionNoFn : BitwiseXORExpressionNoFn
{ $$ = $1; }
| BitwiseORExpressionNoFn '|' BitwiseXORExpression
{ $$ = NEW_EXP($1, $3, "|"); }
;
BitwiseXORExpression : BitwiseANDExpression
{ $$ = $1; }
| BitwiseXORExpression '^' BitwiseANDExpression
{ $$ = NEW_EXP($1, $3, "^"); }
;
BitwiseXORExpressionNoIn : BitwiseANDExpressionNoIn
{ $$ = $1; }
| BitwiseXORExpressionNoIn '^' BitwiseANDExpressionNoIn
{ $$ = NEW_EXP($1, $3, "^"); }
;
BitwiseXORExpressionNoFn : BitwiseANDExpressionNoFn
{ $$ = $1; }
| BitwiseXORExpressionNoFn '^' BitwiseANDExpression
{ $$ = NEW_EXP($1, $3, "^"); }
;
BitwiseANDExpression : EqualityExpression
{ $$ = $1; }
| BitwiseANDExpression '&' EqualityExpression
{ $$ = NEW_EXP($1, $3, "&"); }
;
BitwiseANDExpressionNoIn : EqualityExpressionNoIn
{ $$ = $1; }
| BitwiseANDExpressionNoIn '&' EqualityExpressionNoIn
{ $$ = NEW_EXP($1, $3, "&"); }
;
BitwiseANDExpressionNoFn : EqualityExpressionNoFn
{ $$ = $1; }
| BitwiseANDExpressionNoFn '&' EqualityExpression
{ $$ = NEW_EXP($1, $3, "&"); }
;
EqualityExpression : RelationalExpression
{ $$ = $1; }
| EqualityExpression EQEQ RelationalExpression
{ $$ = NEW_EXP($1, $3, "=="); }
| EqualityExpression NE RelationalExpression
{ $$ = NEW_EXP($1, $3, "!="); }
| EqualityExpression STEQ RelationalExpression
{ $$ = NEW_EXP($1, $3, "==="); }
| EqualityExpression STNE RelationalExpression
{ $$ = NEW_EXP($1, $3, "!=="); }
;
EqualityExpressionNoIn : RelationalExpressionNoIn
{ $$ = $1; }
| EqualityExpressionNoIn EQEQ RelationalExpressionNoIn
{ $$ = NEW_EXP($1, $3, "=="); }
| EqualityExpressionNoIn NE RelationalExpressionNoIn
{ $$ = NEW_EXP($1, $3, "!="); }
| EqualityExpressionNoIn STEQ RelationalExpressionNoIn
{ $$ = NEW_EXP($1, $3, "==="); }
| EqualityExpressionNoIn STNE RelationalExpressionNoIn
{ $$ = NEW_EXP($1, $3, "!=="); }
;
EqualityExpressionNoFn : RelationalExpressionNoFn
{ $$ = $1; }
| EqualityExpressionNoFn EQEQ RelationalExpression
{ $$ = NEW_EXP($1, $3, "=="); }
| EqualityExpressionNoFn NE RelationalExpression
{ $$ = NEW_EXP($1, $3, "!="); }
| EqualityExpressionNoFn STEQ RelationalExpression
{ $$ = NEW_EXP($1, $3, "==="); }
| EqualityExpressionNoFn STNE RelationalExpression
{ $$ = NEW_EXP($1, $3, "!=="); }
;
RelationalExpression : ShiftExpression
{ $$ = $1; }
| RelationalExpression '<' ShiftExpression
{ $$ = NEW_EXP($1, $3, "<"); }
| RelationalExpression '>' ShiftExpression
{ $$ = NEW_EXP($1, $3, ">"); }
| RelationalExpression LTE ShiftExpression
{ $$ = NEW_EXP($1, $3, "<="); }
| RelationalExpression GTE ShiftExpression
{ $$ = NEW_EXP($1, $3, ">="); }
| RelationalExpression INSTANCEOF ShiftExpression
{ $$ = NEW_EXP($1, $3, "instanceof"); }
| RelationalExpression IN ShiftExpression
{ $$ = NEW_EXP($1, $3, "in"); }
;
RelationalExpressionNoIn : ShiftExpression
{ $$ = $1; }
| RelationalExpressionNoIn '<' ShiftExpression
{ $$ = NEW_EXP($1, $3, "<"); }
| RelationalExpressionNoIn '>' ShiftExpression
{ $$ = NEW_EXP($1, $3, ">"); }
| RelationalExpressionNoIn LTE ShiftExpression
{ $$ = NEW_EXP($1, $3, "<="); }
| RelationalExpressionNoIn GTE ShiftExpression
{ $$ = NEW_EXP($1, $3, ">="); }
| RelationalExpressionNoIn INSTANCEOF ShiftExpression
{ $$ = NEW_EXP($1, $3, "instanceof"); }
;
RelationalExpressionNoFn : ShiftExpressionNoFn
{ $$ = $1; }
| RelationalExpressionNoFn '<' ShiftExpression
{ $$ = NEW_EXP($1, $3, "<"); }
| RelationalExpressionNoFn '>' ShiftExpression
{ $$ = NEW_EXP($1, $3, ">"); }
| RelationalExpressionNoFn LTE ShiftExpression
{ $$ = NEW_EXP($1, $3, "<="); }
| RelationalExpressionNoFn GTE ShiftExpression
{ $$ = NEW_EXP($1, $3, ">="); }
| RelationalExpressionNoFn INSTANCEOF ShiftExpression
{ $$ = NEW_EXP($1, $3, "instanceof"); }
;
ShiftExpression : AdditiveExpression
{ $$ = $1; }
| ShiftExpression LSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, "<<"); }
| ShiftExpression RSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, ">>"); }
| ShiftExpression URSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, ">>>"); }
;
ShiftExpressionNoFn : AdditiveExpressionNoFn
{ $$ = $1; }
| ShiftExpressionNoFn LSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, "<<"); }
| ShiftExpressionNoFn RSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, ">>"); }
| ShiftExpressionNoFn URSHIFT AdditiveExpression
{ $$ = NEW_EXP($1, $3, ">>>"); }
;
AdditiveExpression : MultiExpression
{ $$ = $1; }
| AdditiveExpression '+' MultiExpression
{ $$ = NEW_EXP($1, $3, "+"); }
| AdditiveExpression '-' MultiExpression
{ $$ = NEW_EXP($1, $3, "-"); }
;
AdditiveExpressionNoFn : MultiExpressionNoFn
{ $$ = $1; }
| AdditiveExpressionNoFn '+' MultiExpression
{ $$ = NEW_EXP($1, $3, "+"); }
| AdditiveExpressionNoFn '-' MultiExpression
{ $$ = NEW_EXP($1, $3, "-"); }
;
MultiExpression : UnaryExpression
{ $$ = $1; }
| MultiExpression '*' UnaryExpression
{ $$ = NEW_EXP($1, $3, "*"); }
| MultiExpression '/' UnaryExpression
{ $$ = NEW_EXP($1, $3, "/"); }
| MultiExpression '%' UnaryExpression
{ $$ = NEW_EXP($1, $3, "%"); }
;
MultiExpressionNoFn : UnaryExpressionNoFn
{ $$ = $1; }
| MultiExpressionNoFn '*' UnaryExpression
{ $$ = NEW_EXP($1, $3, "*"); }
| MultiExpressionNoFn '/' UnaryExpression
{ $$ = NEW_EXP($1, $3, "/"); }
| MultiExpressionNoFn '%' UnaryExpression
{ $$ = NEW_EXP($1, $3, "%"); }
;
UnaryExpression : PostfixExpression
{ $$ = $1; }
| DELETE UnaryExpression
{ $$ = NEW_UNPRE($2, "delete"); }
| VOID UnaryExpression
{ $$ = NEW_UNPRE($2, "void"); }
| TYPEOF UnaryExpression
{ $$ = NEW_UNPRE($2, "typeof"); }
| PLUSPLUS UnaryExpression
{ $$ = NEW_UNPRE($2, "++"); }
| MINUSMINUS UnaryExpression
{ $$ = NEW_UNPRE($2, "--"); }
| '+' UnaryExpression
{ $$ = NEW_UNPRE($2, "+"); }
| '-' UnaryExpression
{ $$ = NEW_UNPRE($2, "-"); }
| '!' UnaryExpression
{ $$ = NEW_UNPRE($2, "!"); }
| '~' UnaryExpression
{ $$ = NEW_UNPRE($2, "~"); }
;
UnaryExpressionNoFn : PostfixExpressionNoFn
{ $$ = $1; }
| DELETE UnaryExpression
{ $$ = NEW_UNPRE($2, "delete"); }
| VOID UnaryExpression
{ $$ = NEW_UNPRE($2, "void"); }
| TYPEOF UnaryExpression
{ $$ = NEW_UNPRE($2, "typeof"); }
| PLUSPLUS UnaryExpression
{ $$ = NEW_UNPRE($2, "++"); }
| MINUSMINUS UnaryExpression
{ $$ = NEW_UNPRE($2, "--"); }
| '+' UnaryExpression
{ $$ = NEW_UNPRE($2, "+"); }
| '-' UnaryExpression
{ $$ = NEW_UNPRE($2, "-"); }
| '!' UnaryExpression
{ $$ = NEW_UNPRE($2, "!"); }
| '~' UnaryExpression
{ $$ = NEW_UNPRE($2, "~"); }
;
PostfixExpression : LeftHSExpression
{ $$ = $1; }
| LeftHSExpression PLUSPLUS
{ $$ = NEW_UNPOST($1, "++"); }
| LeftHSExpression MINUSMINUS
{ $$ = NEW_UNPOST($1, "--"); }
;
PostfixExpressionNoFn : LeftHSExpressionNoFn
{ $$ = $1; }
| LeftHSExpressionNoFn PLUSPLUS
{ $$ = NEW_UNPOST($1, "++"); }
| LeftHSExpressionNoFn MINUSMINUS
{ $$ = NEW_UNPOST($1, "--"); }
;
Expression : AssignmentExpression
{ $$ = $1; }
| Expression ',' AssignmentExpression
{ $$ = NEW_ASGN($1, $3, 0); }
;
ExpressionNoIn : AssignmentExpressionNoIn
{ $$ = $1; }
| ExpressionNoIn ',' AssignmentExpressionNoIn
{ $$ = NEW_ASGN($1, $3, 0); }
;
ExpressionNoFn : AssignmentExpressionNoFn
{ $$ = $1; }
| ExpressionNoFn ',' AssignmentExpression
{ $$ = NEW_ASGN($1, $3, 0); }
;
AssignmentExpression : ConditionalExpression
{ $$ = $1; }
| LeftHSExpression '=' AssignmentExpression
{ $$ = NEW_ASGN($1, $3, "="); }
| LeftHSExpression AssignmentOperator AssignmentExpression
{ $$ = NEW_ASGN($1, $3, $2); }
;
AssignmentExpressionNoIn : ConditionalExpressionNoIn
{ $$ = $1; }
| LeftHSExpression '=' AssignmentExpressionNoIn
{ $$ = NEW_ASGN($1, $3, "="); }