js/grammars/JavaScriptParser.g4

511 lines
14 KiB
Plaintext
Raw Normal View History

2020-04-15 16:15:56 +10:00
/*
* The MIT License (MIT)
*
* Copyright (c) 2014 by Bart Kiers (original author) and Alexandre Vitorelli (contributor -> ported to CSharp)
* Copyright (c) 2017-2020 by Ivan Kochurkin (Positive Technologies):
added ECMAScript 6 support, cleared and transformed to the universal grammar.
* Copyright (c) 2018 by Juan Alvarez (contributor -> ported to Go)
* Copyright (c) 2019 by Student Main (contributor -> ES2020)
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
parser grammar JavaScriptParser;
options {
tokenVocab=JavaScriptLexer;
superClass=JavaScriptBaseParser;
}
program
: HashBangLine? sourceElements? EOF
;
sourceElement
: statement
;
statement
: block
| variableStatement
| importStatement
| exportStatement
| emptyStatement
| classDeclaration
| expressionStatement
| ifStatement
| iterationStatement
| continueStatement
| breakStatement
| returnStatement
//| yieldStatement
//| withStatement
//| labelledStatement
//| switchStatement
//| throwStatement
//| tryStatement
//| debuggerStatement
| functionDeclaration
;
block
: '{' statementList? '}'
;
statementList
: statement+
;
importStatement
: Import importFromBlock
;
importFromBlock
: importDefault? (importNamespace | moduleItems) importFrom eos
| StringLiteral eos
;
moduleItems
: '{' (aliasName ',')* (aliasName ','?)? '}'
;
importDefault
: aliasName ','
;
importNamespace
: ('*' | identifierName) (As identifierName)?
;
importFrom
: From StringLiteral
;
aliasName
: identifierName (As identifierName)?
;
exportStatement
: Export (exportFromBlock | declaration) eos # ExportDeclaration
| Export Default singleExpression eos # ExportDefaultDeclaration
;
exportFromBlock
: importNamespace importFrom eos
| moduleItems importFrom? eos
;
declaration
: variableStatement
| classDeclaration
| functionDeclaration
;
variableStatement
: variableDeclarationList eos
;
variableDeclarationList
: varModifier variableDeclaration (',' variableDeclaration)*
;
variableDeclaration
: assignable ('=' singleExpression)? // ECMAScript 6: Array & Object Matching
;
emptyStatement
: SemiColon
;
expressionStatement
: {self.notOpenBraceAndNotFunction()}? expressionSequence eos
;
ifStatement
: If '(' expressionSequence ')' statement (Else statement)?
;
iterationStatement
: Do statement While '(' expressionSequence ')' eos # DoStatement
| While '(' expressionSequence ')' statement # WhileStatement
| For '(' (expressionSequence | variableDeclarationList)? ';' expressionSequence? ';' expressionSequence? ')' statement # ForStatement
| For '(' (singleExpression | variableDeclarationList) In expressionSequence ')' statement # ForInStatement
// strange, 'of' is an identifier. and self.p("of") not work in sometime.
// | For /*Await?*/ '(' (singleExpression | variableDeclarationList) identifier{self.p("of")}? expressionSequence ')' statement # ForOfStatement
2020-04-15 16:15:56 +10:00
;
varModifier // let, const - ECMAScript 6
: Var
| let
| Const
;
continueStatement
: Continue ({self.notLineTerminator()}? identifier)? eos
;
breakStatement
: Break ({self.notLineTerminator()}? identifier)? eos
;
returnStatement
: Return ({self.notLineTerminator()}? expressionSequence)? eos
;
//yieldStatement
// : Yield ({self.notLineTerminator()}? expressionSequence)? eos
// ;
//
//withStatement
// : With '(' expressionSequence ')' statement
// ;
//
//switchStatement
// : Switch '(' expressionSequence ')' caseBlock
// ;
//caseBlock
// : '{' caseClauses? (defaultClause caseClauses?)? '}'
// ;
//
//caseClauses
// : caseClause+
// ;
//
//caseClause
// : Case expressionSequence ':' statementList?
// ;
//
//defaultClause
// : Default ':' statementList?
// ;
//
//labelledStatement
// : identifier ':' statement
// ;
//
//throwStatement
// : Throw {self.notLineTerminator()}? expressionSequence eos
// ;
//
//tryStatement
// : Try block (catchProduction finallyProduction? | finallyProduction)
// ;
//
//catchProduction
// : Catch ('(' assignable? ')')? block
// ;
//
//finallyProduction
// : Finally block
// ;
//
//debuggerStatement
// : Debugger eos
// ;
functionDeclaration
: /*Async?*/ Function '*'? identifier '(' formalParameterList? ')' '{' functionBody '}'
;
classDeclaration
: Class identifier classTail
;
classTail
: (Extends singleExpression)? '{' classElement* '}'
;
classElement
: (Static | {self.n("static")}? identifier /*| Async*/)* (methodDefinition | assignable '=' objectLiteral ';')
| emptyStatement
| '#'? propertyName '=' singleExpression
;
methodDefinition
: '*'? '#'? propertyName '(' formalParameterList? ')' '{' functionBody '}'
| '*'? '#'? getter '(' ')' '{' functionBody '}'
| '*'? '#'? setter '(' formalParameterList? ')' '{' functionBody '}'
;
formalParameterList
: formalParameterArg (',' formalParameterArg)* (',' lastFormalParameterArg)?
| lastFormalParameterArg
;
formalParameterArg
: assignable ('=' singleExpression)? // ECMAScript 6: Initialization
;
lastFormalParameterArg // ECMAScript 6: Rest Parameter
: Ellipsis singleExpression
;
functionBody
: sourceElements?
;
sourceElements
: sourceElement+
;
arrayLiteral
: ('[' elementList ']')
;
elementList
: ','* arrayElement? (','+ arrayElement)* ','* // Yes, everything is optional
;
arrayElement
: Ellipsis? singleExpression
;
propertyAssignment
: propertyName ':' singleExpression # PropertyExpressionAssignment
| '[' singleExpression ']' ':' singleExpression # ComputedPropertyExpressionAssignment
| /*Async?*/ '*'? propertyName '(' formalParameterList? ')' '{' functionBody '}' # FunctionProperty
| getter '(' ')' '{' functionBody '}' # PropertyGetter
| setter '(' formalParameterArg ')' '{' functionBody '}' # PropertySetter
| Ellipsis? singleExpression # PropertyShorthand
;
propertyName
: identifierName
| StringLiteral
| numericLiteral
| '[' singleExpression ']'
;
arguments
: '('(argument (',' argument)* ','?)?')'
;
argument
: Ellipsis? (singleExpression | identifier)
;
expressionSequence
: singleExpression (',' singleExpression)*
;
singleExpression
: anoymousFunction # FunctionExpression
| Class identifier? classTail # ClassExpression
| singleExpression '[' expressionSequence ']' # MemberIndexExpression
| singleExpression '?'? '.' '#'? identifierName # MemberDotExpression
| singleExpression arguments # ArgumentsExpression
| New singleExpression arguments? # NewExpression
| New '.' identifier # MetaExpression // new.target
| singleExpression {self.notLineTerminator()}? '++' # PostIncrementExpression
| singleExpression {self.notLineTerminator()}? '--' # PostDecreaseExpression
| Delete singleExpression # DeleteExpression
| Void singleExpression # VoidExpression
| Typeof singleExpression # TypeofExpression
| '++' singleExpression # PreIncrementExpression
| '--' singleExpression # PreDecreaseExpression
| '+' singleExpression # UnaryPlusExpression
| '-' singleExpression # UnaryMinusExpression
| '~' singleExpression # BitNotExpression
| '!' singleExpression # NotExpression
// | Await singleExpression # AwaitExpression
| <assoc=right> singleExpression '**' singleExpression # PowerExpression
| singleExpression ('*' | '/' | '%') singleExpression # MultiplicativeExpression
| singleExpression ('+' | '-') singleExpression # AdditiveExpression
| singleExpression '??' singleExpression # CoalesceExpression
| singleExpression ('<<' | '>>' | '>>>') singleExpression # BitShiftExpression
| singleExpression ('<' | '>' | '<=' | '>=') singleExpression # RelationalExpression
// | singleExpression Instanceof singleExpression # InstanceofExpression
| singleExpression In singleExpression # InExpression
| singleExpression ('==' | '!=' | '===' | '!==') singleExpression # EqualityExpression
| singleExpression '&' singleExpression # BitAndExpression
| singleExpression '^' singleExpression # BitXOrExpression
| singleExpression '|' singleExpression # BitOrExpression
| singleExpression '&&' singleExpression # LogicalAndExpression
| singleExpression '||' singleExpression # LogicalOrExpression
| singleExpression '?' singleExpression ':' singleExpression # TernaryExpression
| <assoc=right> singleExpression '=' singleExpression # AssignmentExpression
| <assoc=right> singleExpression assignmentOperator singleExpression # AssignmentOperatorExpression
| Import '(' singleExpression ')' # ImportExpression
// | singleExpression TemplateStringLiteral # TemplateStringExpression // ECMAScript 6
2020-04-15 16:15:56 +10:00
// | yieldStatement # YieldExpression // ECMAScript 6
| This # ThisExpression
| identifier # IdentifierExpression
| Super # SuperExpression
| literal # LiteralExpression
| arrayLiteral # ArrayLiteralExpression
| objectLiteral # ObjectLiteralExpression
| '(' expressionSequence ')' # ParenthesizedExpression
;
assignable
: identifier
| arrayLiteral
| objectLiteral
;
objectLiteral
: '{' (propertyAssignment (',' propertyAssignment)*)? ','? '}'
;
anoymousFunction
: functionDeclaration # FunctionDecl
| /*Async?*/ Function '*'? '(' formalParameterList? ')' '{' functionBody '}' # AnoymousFunctionDecl
| /*Async?*/ arrowFunctionParameters '=>' arrowFunctionBody # ArrowFunction
;
arrowFunctionParameters
: identifier
| '(' formalParameterList? ')'
;
arrowFunctionBody
: singleExpression
| '{' functionBody '}'
;
assignmentOperator
: '*='
| '/='
| '%='
| '+='
| '-='
| '<<='
| '>>='
| '>>>='
| '&='
| '^='
| '|='
| '**='
;
literal
: NullLiteral
| BooleanLiteral
| StringLiteral
// | TemplateStringLiteral
// | RegularExpressionLiteral
2020-04-15 16:15:56 +10:00
| numericLiteral
| bigintLiteral
;
numericLiteral
: DecimalLiteral
// | HexIntegerLiteral
// | OctalIntegerLiteral
// | OctalIntegerLiteral2
// | BinaryIntegerLiteral
;
bigintLiteral
: BigDecimalIntegerLiteral
// | BigHexIntegerLiteral
// | BigOctalIntegerLiteral
// | BigBinaryIntegerLiteral
;
getter
: identifier {self.p("get")}? propertyName
;
setter
: identifier {self.p("set")}? propertyName
;
identifierName
: identifier
| reservedWord
;
identifier
: Identifier
| NonStrictLet
// | Async
;
reservedWord
: keyword
| NullLiteral
| BooleanLiteral
;
keyword
: Break
| Do
// | Instanceof
| Typeof
// | Case
| Else
| New
| Var
// | Catch
// | Finally
| Return
| Void
| Continue
| For
// | Switch
| While
// | Debugger
| Function
| This
// | With
| Default
| If
// | Throw
2020-04-15 16:15:56 +10:00
| Delete
| In
// | Try
| Class
| Enum
| Extends
| Super
| Const
| Export
| Import
| Implements
| let
| Private
| Public
| Interface
| Package
| Protected
| Static
// | Yield
// | Async
// | Await
| From
| As
;
let
: NonStrictLet
| StrictLet
;
eos
: SemiColon
| EOF
| {self.lineTerminatorAhead()}?
| {self.closeBrace()}?
;