edu.illinois.cs.cs125.questioner.antlr.kotlin.KotlinParser.g4 Maven / Gradle / Ivy
/**
* Kotlin Grammar for ANTLR v4
*
* Based on:
* http://jetbrains.github.io/kotlin-spec/#_grammars_and_parsing
* and
* http://kotlinlang.org/docs/reference/grammar.html
*
* Tested on
* https://github.com/JetBrains/kotlin/tree/master/compiler/testData/psi
*/
parser grammar KotlinParser;
options { tokenVocab = KotlinLexer; }
kotlinFile
: NL* preamble anysemi* (topLevelObject (anysemi+ topLevelObject?)*)? EOF
;
script
: NL* preamble anysemi* (expression (anysemi+ expression?)*)? EOF
;
preamble
: fileAnnotations? packageHeader importList
;
fileAnnotations
: fileAnnotation+
;
fileAnnotation
: (FILE COLON (LSQUARE unescapedAnnotation+ RSQUARE | unescapedAnnotation) semi?)+
;
packageHeader
: (modifierList? PACKAGE identifier semi?)?
;
importList
: importHeader*
;
importHeader
: IMPORT identifier (DOT MULT | importAlias)? semi?
;
importAlias
: AS simpleIdentifier
;
topLevelObject
: classDeclaration
| objectDeclaration
| functionDeclaration
| propertyDeclaration
| typeAlias
| DelimitedComment
;
classDeclaration
: ((JavadocComment | DelimitedComment) NL+)? modifierList? (CLASS | (FUN? INTERFACE)) NL* simpleIdentifier
(NL* typeParameters)? (NL* primaryConstructor)?
(NL* COLON NL* delegationSpecifiers)?
(NL* typeConstraints)?
(NL* classBody | NL* enumClassBody)?
;
primaryConstructor
: modifierList? (CONSTRUCTOR NL*)? classParameters
;
classParameters
: LPAREN NL* (classParameter (NL* COMMA NL* classParameter)* (NL* COMMA)?)? NL* RPAREN
;
classParameter
: modifierList? (VAL | VAR)? simpleIdentifier COLON type (ASSIGNMENT expression)?
;
delegationSpecifiers
: annotations* delegationSpecifier (NL* COMMA NL* delegationSpecifier)*
;
delegationSpecifier
: constructorInvocation
| userType
| explicitDelegation
;
constructorInvocation
: userType callSuffix
;
explicitDelegation
: userType NL* BY NL* expression
;
classBody
: LCURL NL* classMemberDeclaration* NL* RCURL
;
classMemberDeclaration
: (classDeclaration
| functionDeclaration
| objectDeclaration
| companionObject
| propertyDeclaration
| anonymousInitializer
| secondaryConstructor
| typeAlias) anysemi*
;
anonymousInitializer
: INIT NL* block
;
secondaryConstructor
: modifierList? CONSTRUCTOR NL* functionValueParameters (NL* COLON NL* constructorDelegationCall)? NL* block
;
constructorDelegationCall
: THIS NL* valueArguments
| SUPER NL* valueArguments
;
enumClassBody
: LCURL NL* enumEntries? (NL* SEMICOLON NL* classMemberDeclaration*)? NL* RCURL
;
enumEntries
: (enumEntry NL*)+ SEMICOLON?
;
enumEntry
: simpleIdentifier (NL* valueArguments)? (NL* classBody)? (NL* COMMA)?
;
functionDeclaration
: (JavadocComment NL+)? modifierList? FUN
(NL* type NL* DOT)?
(NL* typeParameters)?
(NL* identifier)?
NL* functionValueParameters
(NL* COLON NL* type)?
(NL* typeConstraints)?
(NL* functionBody)?
;
functionValueParameters
: LPAREN NL* (functionValueParameter (NL* COMMA NL* functionValueParameter)* (NL* COMMA)?)? NL* RPAREN
;
functionValueParameter
: modifierList? parameter (ASSIGNMENT expression)?
;
parameter
: simpleIdentifier COLON type
;
functionBody
: block
| ASSIGNMENT NL* expression
;
objectDeclaration
: (JavadocComment NL+)? modifierList? OBJECT
NL* simpleIdentifier
(NL* primaryConstructor)?
(NL* COLON NL* delegationSpecifiers)?
(NL* classBody)?
;
companionObject
: modifierList? COMPANION NL* modifierList? OBJECT
(NL* simpleIdentifier)?
(NL* COLON NL* delegationSpecifiers)?
(NL* classBody)?
;
propertyDeclaration
: (JavadocComment NL+)? modifierList? (VAL | VAR)
(NL* typeParameters)?
(NL* type NL* DOT)?
(NL* (multiVariableDeclaration | variableDeclaration))
(NL* typeConstraints)?
(NL* (BY | ASSIGNMENT) NL* expression)?
(NL setter (NL getter)?)?
(NL getter (NL setter)?)?
(getter (semi setter)? | setter (semi getter)?)?
;
multiVariableDeclaration
: LPAREN variableDeclaration (COMMA variableDeclaration)* RPAREN
;
variableDeclaration
: simpleIdentifier (COLON type)?
;
getter
: modifierList? GETTER
| modifierList? GETTER NL* LPAREN RPAREN (NL* COLON NL* type)? NL* (block | ASSIGNMENT NL* expression)
;
setter
: modifierList? SETTER
| modifierList? SETTER NL* LPAREN (annotations | parameterModifier)* (simpleIdentifier | parameter) RPAREN NL* functionBody
;
typeAlias
: modifierList? TYPE_ALIAS NL* simpleIdentifier (NL* typeParameters)? NL* ASSIGNMENT NL* type
;
typeParameters
: LANGLE NL* typeParameter (NL* COMMA NL* typeParameter)* NL* RANGLE
;
typeParameter
: modifierList? NL* simpleIdentifier (NL* COLON NL* type)?
;
type
: typeModifierList?
( functionType
| parenthesizedType
| nullableType
| typeReference)
;
typeModifierList
: (annotations | SUSPEND NL*)+
;
parenthesizedType
: LPAREN type RPAREN
;
nullableType
: (typeReference | parenthesizedType) NL* QUEST+
;
typeReference
: LPAREN typeReference RPAREN
| userType
| DYNAMIC
;
functionType
: (functionTypeReceiver NL* DOT NL*)? functionTypeParameters NL* ARROW (NL* type)
;
functionTypeReceiver
: parenthesizedType
| nullableType
| typeReference
;
userType
: simpleUserType (NL* DOT NL* simpleUserType)*
;
simpleUserType
: simpleIdentifier (NL* typeArguments)?
;
//parameters for functionType
functionTypeParameters
: LPAREN (parameter | type)? (COMMA (parameter | type))* RPAREN
;
typeConstraints
: WHERE NL* typeConstraint (NL* COMMA NL* typeConstraint)*
;
typeConstraint
: annotations* simpleIdentifier NL* COLON NL* type
;
block
: LCURL statements RCURL
;
statements
: anysemi* (statement (anysemi+ statement?)*)?
;
statement
: declaration
| blockLevelExpression
;
blockLevelExpression
: annotations* NL* expression
;
declaration
: labelDefinition*
( classDeclaration
| functionDeclaration
| propertyDeclaration
| typeAlias)
;
expression
: disjunction (assignmentOperator NL* disjunction)*
;
disjunction
: conjunction (NL* DISJ NL* conjunction)*
;
conjunction
: equalityComparison (NL* CONJ NL* equalityComparison)*
;
equalityComparison
: comparison (equalityOperation NL* comparison)*
;
comparison
: namedInfix (comparisonOperator NL* namedInfix)?
;
namedInfix
: elvisExpression ((inOperator NL* elvisExpression)+ | (isOperator NL* type))?
;
elvisExpression
: infixFunctionCall (NL* ELVIS NL* infixFunctionCall)*
;
infixFunctionCall
: rangeExpression (simpleIdentifier NL* rangeExpression)*
;
rangeExpression
: additiveExpression ((RANGE | RANGE_UNTIL) NL* additiveExpression)*
;
additiveExpression
: multiplicativeExpression (additiveOperator NL* multiplicativeExpression)*
;
multiplicativeExpression
: typeRHS (multiplicativeOperation NL* typeRHS)*
;
typeRHS
: prefixUnaryExpression (NL* typeOperation prefixUnaryExpression)*
;
prefixUnaryExpression
: prefixUnaryOperation* postfixUnaryExpression
;
postfixUnaryExpression
: (atomicExpression | callableReference) postfixUnaryOperation*
;
atomicExpression
: parenthesizedExpression
| literalConstant
| functionLiteral
| thisExpression // THIS labelReference?
| superExpression // SUPER (LANGLE type RANGLE)? labelReference?
| conditionalExpression // ifExpression, whenExpression
| tryExpression
| objectLiteral
| jumpExpression
| loopExpression
| collectionLiteral
| simpleIdentifier
;
parenthesizedExpression
: LPAREN expression RPAREN
;
callSuffix
: typeArguments valueArguments? annotatedLambda*
| valueArguments annotatedLambda*
| annotatedLambda+
;
annotatedLambda
: unescapedAnnotation* LabelDefinition? NL* functionLiteral
;
arrayAccess
: LSQUARE (expression (COMMA expression)*)? RSQUARE
;
valueArguments
: LPAREN NL* (valueArgument (NL* COMMA NL* valueArgument)* (NL* COMMA)? NL*)? RPAREN
;
typeArguments
: LANGLE NL* typeProjection (NL* COMMA typeProjection)* NL* RANGLE
;
typeProjection
: typeProjectionModifierList? type | MULT
;
typeProjectionModifierList
: varianceAnnotation+
;
valueArgument
: (simpleIdentifier NL* ASSIGNMENT NL*)? MULT? NL* expression
;
literalConstant
: BooleanLiteral
| IntegerLiteral
| stringLiteral
| HexLiteral
| BinLiteral
| CharacterLiteral
| RealLiteral
| NullLiteral
| LongLiteral
;
stringLiteral
: lineStringLiteral
| multiLineStringLiteral
;
lineStringLiteral
: QUOTE_OPEN (lineStringContent | lineStringExpression)* QUOTE_CLOSE
;
multiLineStringLiteral
: TRIPLE_QUOTE_OPEN (multiLineStringContent | multiLineStringExpression | lineStringLiteral | MultiLineStringQuote)* TRIPLE_QUOTE_CLOSE
;
lineStringContent
: LineStrText
| LineStrEscapedChar
| LineStrRef
;
lineStringExpression
: LineStrExprStart expression RCURL
;
multiLineStringContent
: MultiLineStrText
| MultiLineStrEscapedChar
| MultiLineStrRef
;
multiLineStringExpression
: MultiLineStrExprStart expression RCURL
;
functionLiteral
: annotations*
( LCURL NL* statements NL* RCURL
| LCURL NL* lambdaParameters NL* ARROW NL* statements NL* RCURL )
;
lambdaParameters
: lambdaParameter? (NL* COMMA NL* lambdaParameter)*
;
lambdaParameter
: variableDeclaration
| multiVariableDeclaration (NL* COLON NL* type)?
;
objectLiteral
: OBJECT (NL* COLON NL* delegationSpecifiers)? NL* classBody
;
collectionLiteral
: LSQUARE expression? (COMMA expression)* RSQUARE
;
thisExpression
: THIS LabelReference?
;
superExpression
: SUPER (LANGLE NL* type NL* RANGLE)? LabelReference?
;
conditionalExpression
: ifExpression
| whenExpression
;
ifExpression
: IF NL* LPAREN expression RPAREN NL* controlStructureBody? SEMICOLON?
(NL* ELSE NL* controlStructureBody?)?
;
controlStructureBody
: block
| expression
;
whenExpression
: WHEN NL* (LPAREN expression RPAREN)? NL* LCURL NL* (whenEntry NL*)* NL* RCURL
;
whenEntry
: whenCondition (NL* COMMA NL* whenCondition)* NL* ARROW NL* controlStructureBody semi?
| ELSE NL* ARROW NL* controlStructureBody
;
whenCondition
: expression
| rangeTest
| typeTest
;
rangeTest
: inOperator NL* expression
;
typeTest
: isOperator NL* type
;
tryExpression
: TRY NL* block (NL* catchBlock)* (NL* finallyBlock)?
;
catchBlock
: CATCH NL* LPAREN annotations* simpleIdentifier COLON userType RPAREN NL* block
;
finallyBlock
: FINALLY NL* block
;
loopExpression
: forExpression
| whileExpression
| doWhileExpression
;
forExpression
: FOR NL* LPAREN annotations* (variableDeclaration | multiVariableDeclaration) IN expression RPAREN NL* controlStructureBody?
;
whileExpression
: WHILE NL* LPAREN expression RPAREN NL* controlStructureBody?
;
doWhileExpression
: DO NL* controlStructureBody? NL* WHILE NL* LPAREN expression RPAREN
;
jumpExpression
: THROW NL* expression
| (RETURN | RETURN_AT) expression?
| CONTINUE | CONTINUE_AT
| BREAK | BREAK_AT
;
callableReference
: (userType (QUEST NL*)*)? NL* (COLONCOLON | Q_COLONCOLON) NL* (identifier | CLASS)
;
assignmentOperator
: ASSIGNMENT
| ADD_ASSIGNMENT
| SUB_ASSIGNMENT
| MULT_ASSIGNMENT
| DIV_ASSIGNMENT
| MOD_ASSIGNMENT
;
equalityOperation
: EXCL_EQ
| EXCL_EQEQ
| EQEQ
| EQEQEQ
;
comparisonOperator
: LANGLE
| RANGLE
| LE
| GE
;
inOperator
: IN | NOT_IN
;
isOperator
: IS | NOT_IS
;
additiveOperator
: ADD | SUB
;
multiplicativeOperation
: MULT
| DIV
| MOD
;
typeOperation
: AS
| AS_SAFE
| COLON
;
prefixUnaryOperation
: INCR
| DECR
| ADD
| SUB
| EXCL
| annotations
| labelDefinition
;
postfixUnaryOperation
: INCR | DECR | EXCL EXCL
| callSuffix
| arrayAccess
| NL* memberAccessOperator postfixUnaryExpression
;
memberAccessOperator
: DOT | QUEST DOT
;
modifierList
: (annotations | modifier)+
;
modifier
: (classModifier
| memberModifier
| visibilityModifier
| varianceAnnotation
| functionModifier
| propertyModifier
| inheritanceModifier
| parameterModifier
| typeParameterModifier) NL*
;
classModifier
: ENUM
| SEALED
| ANNOTATION
| DATA
| INNER
;
memberModifier
: OVERRIDE
| LATEINIT
;
visibilityModifier
: PUBLIC
| PRIVATE
| INTERNAL
| PROTECTED
;
varianceAnnotation
: IN | OUT
;
functionModifier
: TAILREC
| OPERATOR
| INFIX
| INLINE
| EXTERNAL
| SUSPEND
;
propertyModifier
: CONST
;
inheritanceModifier
: ABSTRACT
| FINAL
| OPEN
;
parameterModifier
: VARARG
| NOINLINE
| CROSSINLINE
;
typeParameterModifier
: REIFIED
;
labelDefinition
: LabelDefinition NL*
;
annotations
: (annotation | annotationList) NL*
;
annotation
: annotationUseSiteTarget NL* COLON NL* unescapedAnnotation
| LabelReference (NL* typeArguments)? (NL* valueArguments)?
;
annotationList
: annotationUseSiteTarget COLON LSQUARE unescapedAnnotation+ RSQUARE
| AT LSQUARE unescapedAnnotation+ RSQUARE
;
annotationUseSiteTarget
: FIELD
| FILE
| PROPERTY
| GET
| SET
| RECEIVER
| PARAM
| SETPARAM
| DELEGATE
;
unescapedAnnotation
: identifier typeArguments? valueArguments?
;
identifier
: simpleIdentifier (NL* DOT simpleIdentifier)*
;
simpleIdentifier
: Identifier
//soft keywords:
| ABSTRACT
| ANNOTATION
| BY
| CATCH
| COMPANION
| CONSTRUCTOR
| CROSSINLINE
| DATA
| DYNAMIC
| ENUM
| EXTERNAL
| FINAL
| FINALLY
| GETTER
| IMPORT
| INFIX
| INIT
| INLINE
| INNER
| INTERNAL
| LATEINIT
| NOINLINE
| OPEN
| OPERATOR
| OUT
| OVERRIDE
| PRIVATE
| PROTECTED
| PUBLIC
| REIFIED
| SEALED
| TAILREC
| SETTER
| VARARG
| WHERE
//strong keywords
| CONST
| SUSPEND
;
semi: NL+ | NL* SEMICOLON NL*;
anysemi: NL | SEMICOLON;
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