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syntax SPL(k = 0) {

	primitiveTemplate identifier for String default using NAME:
		value = "%token%";

	primitiveTemplate stringSymbol for String using STRING:
		value = "%token%",
		serializer="'\'' + %value%.toCString() + '\''";

	primitiveTemplate uriSymbol for String using URI:
		value = "%token%",
		serializer="'\'' + %value%.toCString() + '\''";

	primitiveTemplate headerIdSymbol for String using HEADERID:
		value = "%token%",
		serializer="'\'' + %value%.toCString() + '\''";

	primitiveTemplate integerSymbol for Integer default using INT:
		value = "Integer.valueOf(%token%)";

	template Program main
		:	service
		;

	template Service context
		:	"service" name "{" [
				[ "processing" "{" ] {indentIncr = 0, startNL = false, endNL = false, nbNL = 0} [
					declarations
					sessions
				] {nbNL = 2} "}"
			] "}"
		;

-- @begin Sessions
	template Session abstract;

	template Registration context
		:	"registration" "{" [
				declarations
				sessions
			] {nbNL = 2} "}"
		;

	template Dialog context
		:	"dialog" "{" [
				declarations
				methods
			] {nbNL = 2} "}"
		;

	template Event
		:	"event" eventId
			"{" [
				declarations
				methods
			] {nbNL = 2} "}"
		;

-- @begin Methods
	template Method context
		:	$methodHeader
			"{" [
				(isDefined(branches) ?
						branches
					:
						statements
				)
			] "}"
		;

--	template SimpleMethod
--		:	$methodHeader "{" [
--				statements
--			] "}"
--		;

--	template ComposedMethod
--		:	$methodHeader "{" [
--				branches
--			] "}"
--		;

	function methodHeader(Method)
		:	type
			(direction = #in ?
					"incoming"
				:
					(direction = #out ?
							"outgoing"
						:
							-- inout
					)
			)
			methodName
			"(" arguments{separator = ","} ")"
		;

	template Argument addToContext
		:	type name
		;

-- @begin Method Names
	template MethodName abstract;

	template SIPMethodName
		:	name
		;

	template ControlMethodName
		:	name
		;
-- @end Method Names
-- @end Methods
-- @end Sessions


-- @begin Branches
	template Branch abstract;

	template DefaultBranch
		:	"branch" "default"
			"{" statements "}"
		;

	template NamedBranch
		:	"branch" name{separator = "|"}
			"{" statements "}"
		;
-- @end Branches

-- @begin Declarations
	template Declaration abstract;

	template VariableDeclaration addToContext
		:	type name (isDefined(initExp) ? "=" initExp) ";"
		;

-- @begin FunctionDeclarations
	template FunctionDeclaration abstract;

	template RemoteFunctionDeclaration addToContext
		:	functionLocation returnType name "(" arguments{separator = ","} ")" ";"
		;

	template LocalFunctionDeclaration addToContext
		:	returnType name "(" arguments{separator = ","} ")" "{" [
				statements
			] "}"
		;
-- @end FunctionDeclarations

-- @begin StructureDeclarations
	template StructureDeclaration
		:	"type" name "{" [
				properties
			] "}"
		;

	template StructureProperty
		:	type name ";"
		;
-- @end StructureDeclarations
-- @end Declarations

-- @begin Statements
	template Statement abstract;

	template CompoundStat
		:	"{" [ statements ] "}"
		;

	template SetStat
		:	target "=" setValue ";"
		;

	template DeclarationStat
		:	declaration
		;

	template ReturnStat
		:	"return"
			(isDefined(returnedValue) ? returnedValue)
			(isDefined(branch) ? "branch" branch{refersTo = name, autoCreate = ifmissing})
			";"
		;

	template IfStat
		:	"if" "(" condition ")" [
				thenStatement
			]
			(isDefined(elseStatement) ?
				"else" [
					elseStatement
				]
			)
		;

	template WhenStat context
		:	"when" idExp "(" whenHeaders{separator = ","} ")" "{" [
				statements
			] "}"
			(isDefined(elseStatement) ?
				"else" [
					elseStatement
				]
			)
		;

	template WhenHeader addToContext
		:	headerId{as = headerIdSymbol} type name (isDefined(value) ? value)
		;

	template ForeachStat context
		:	"foreach" "(" iterator "in" sequenceExp ")" "{" [
				statements
			] "}"
		;

	template Iterator addToContext
		:	name
		;

	template SelectStat
		:	"select" "(" matchedExp ")" "{" [
				selectCases
				(isDefined(selectDefault) ?
					selectDefault
				)
			] "}"
		;

	template SelectCase
		:	"case" values{separator = "|"} ":" [ statements ]
		;

	template SelectDefault
		:	"default" ":" [ statements ]
		;

	template FunctionCallStat
		:	functionCall ";"
		;

	template ContinueStat
		:	"continue" ";"
		;

	template BreakStat
		:	"break" ";"
		;

	template PushStat
		:	"push" target pushedValue ";"
		;
-- @end Statements

-- @begin Expressions
	template Expression abstract operatored;

	template ConstantExp
		:	value
		;

	operatorTemplate OperatorExp(operators =
--				opPoint opRarrow
				opNot opMinus1
				opStar opSlash
				opPlus opMinus2
				opEq opGt opLt opGe opLe opNe
				opAnd opOr
				opMatch opNoMatch
			, source = leftExp, storeOpTo = opName, storeRightTo = rightExp);

	-- must be nonPrimary because it finishes (or may finish) by an expression
	template ForwardExp nonPrimary
		:	(isParallel ? "parallel") "forward" (isDefined(exp) ? exp)
		;

	-- must be operatorTemplate because it is left recursive
	operatorTemplate WithExp(operators = opWith, source = exp)
		:	"{" msgFields{separator = ","} "}"
		;

	template MessageField abstract;

	template ReasonMessageField
		:	"reason" "=" exp
		;

	template HeadedMessageField
		:	headerId{as = headerIdSymbol} exp
		;

	-- TODO: BlockExp?
	template ReasonExp
		:	"reason"
		;

	template BODYExp
		:	"BODY"
		;

	template RequestURIExp
		:	"requestURI"
		;

	template PopExp
		:	"pop" source
		;

	template FunctionCallExp
		:	functionCall
		;

	template FunctionCall
		:	function{refersTo = name} "(" parameters{separator = ","} ")"
		;

	template Place abstract;

	template SIPHeaderPlace
		:	header
		;

	template VariablePlace abstract;

	template Variable
		:	source{refersTo = name}
		;

--	template PropertyCallPlace
--		:	-- TODO
--		;
-- @end Expressions

-- @begin Constants
	template Constant abstract;

	template BooleanConstant
		:	(value ? "true" : "false")
		;

	template IntegerConstant
		:	value
		;

	template StringConstant
		:	value{as = stringSymbol}
		;

	template URIConstant
		:	uri{as = uriSymbol}
		;

	template SequenceConstant
		:	"<" values{separator = ","} ">"
		;

	template ResponseConstant
		:	response
		;
-- @end Constants

-- @begin Responses
	template Response abstract;

	template SuccessResponse abstract
		:	"/" <no_space> "SUCCESS"
			(isDefined(successKind) ? <no_space> "/" <no_space> successKind)
		;

	template ErrorResponse abstract
		:	"/" <no_space> "ERROR"
		;

	template ClientErrorResponse
		:	"/" <no_space> "ERROR" <no_space> "/" <no_space> "CLIENT"
			(isDefined(errorKind) ? <no_space> "/" <no_space> errorKind)
		;

	template GlobalErrorResponse
		:	"/" <no_space> "ERROR" <no_space> "/" <no_space> "GLOBAL"
			(isDefined(errorKind) ? <no_space> "/" <no_space> errorKind)
		;

	template RedirectionErrorResponse
		:	"/" <no_space> "ERROR" <no_space> "/" <no_space> "REDIRECTION"
			(isDefined(errorKind) ? <no_space> "/" <no_space> errorKind)
		;

	template ServerErrorResponse
		:	"/" <no_space> "ERROR" <no_space> "/" <no_space> "SERVER"
			(isDefined(errorKind) ? <no_space> "/" <no_space> errorKind)
		;
-- @end Responses


-- @begin Types
	template TypeExpression abstract;

	template SimpleType
		:	type
		;

	template SequenceType
		:	(isDefined(modifier) ?
				modifier
			)
			type "<" (isDefined(size) ? size) ">"
		;

	enumerationTemplate Modifier auto
		:	#LIFO		= "LIFO",
			#FIFO		= "FIFO"
		;
-- @end Types

	enumerationTemplate SIPMethod auto
		:	#ACK		= "ACK",
			#BYE		= "BYE",
			#CANCEL		= "CANCEL",
			#INVITE		= "INVITE",
			#NOTIFY		= "NOTIFY",
			#OPTIONS	= "OPTIONS",
			#REACK		= "REACK",
			#REGISTER	= "REGISTER",
			#REINVITE	= "REINVITE",
			#RESUBSCRIBE	= "RESUBSCRIBE",
			#SUBSCRIBE	= "SUBSCRIBE"
		;

	enumerationTemplate ControlMethod auto
		:	#deploy		= "deploy",
			#undeploy	= "undeploy",
			#uninvite	= "uninvite",
			#unregister	= "unregister",
			#unsubscribe	= "unsubscribe"
		;

	enumerationTemplate FunctionLocation auto
		:	#remote		= "remote",
			#local		= "local"
		;

	enumerationTemplate SuccessKind auto
		:	#OK		= "OK",
			#ACCEPTED	= "ACCEPTED"
		;

	enumerationTemplate ClientErrorKind auto
		:	#ADDRESS_INCOMPLETE			= "ADDRESS_INCOMPLETE",
			#AMBIGUOUS				= "AMBIGUOUS",
			#BAD_EXTENSION				= "BAD_EXTENSION",
			#BAD_REQUEST				= "BAD_REQUEST",
			#BUSY_HERE				= "BUSY_HERE",
			#CALL_OR_TRANSACTION_DOES_NOT_EXIST	= "CALL_OR_TRANSACTION_DOES_NOT_EXIST",
			#EXTENSION_REQUIRED			= "EXTENSION_REQUIRED",
			#FORBIDDEN				= "FORBIDDEN",
			#GONE					= "GONE",
			#INTERVAL_TOO_BRIEF			= "INTERVAL_TOO_BRIEF",
			#LOOP_DETECTED				= "LOOP_DETECTED",
			#METHOD_NOT_ALLOWED			= "METHOD_NOT_ALLOWED",
			#NOT_ACCEPTABLE_HERE			= "NOT_ACCEPTABLE_HERE",
			#NOT_ACCEPTABLE				= "NOT_ACCEPTABLE",
			#NOT_FOUND				= "NOT_FOUND",
			#PAYMENT_REQUIRED			= "PAYMENT_REQUIRED",
			#PROXY_AUTHENTICATION_REQUIRED		= "PROXY_AUTHENTICATION_REQUIRED",
			#REQUESTURI_TOO_LONG			= "REQUESTURI_TOO_LONG",
			#REQUEST_ENTITY_TOO_LARGE		= "REQUEST_ENTITY_TOO_LARGE",
			#REQUEST_PENDING			= "REQUEST_PENDING",
			#REQUEST_TERMINATED			= "REQUEST_TERMINATED",
			#REQUEST_TIMEOUT			= "REQUEST_TIMEOUT",
			#TEMPORARILY_UNAVAILABLE		= "TEMPORARILY_UNAVAILABLE",
			#TOO_MANY_HOPS				= "TOO_MANY_HOPS",
			#UNAUTHORIZED				= "UNAUTHORIZED",
			#UNDECIPHERABLE				= "UNDECIPHERABLE",
			#UNSUPPORTED_MEDIA_TYPE			= "UNSUPPORTED_MEDIA_TYPE",
			#UNSUPPORTED_URI_SCHEME			= "UNSUPPORTED_URI_SCHEME"
		;

	enumerationTemplate GlobalErrorKind auto
		:	#BUSY_EVERYWHERE		= "BUSY_EVERYWHERE",
			#DECLINE			= "DECLINE",
			#DOES_NOT_EXIST_ANYWHERE	= "DOES_NOT_EXIST_ANYWHERE",
			#NOT_ACCEPTABLE			= "NOT_ACCEPTABLE"
		;

	enumerationTemplate RedirectionErrorKind auto
		:	#ALTERNATIVE_SERVICE	= "ALTERNATIVE_SERVICE",
			#MOVED_PERMANENTLY	= "MOVED_PERMANENTLY",
			#MOVED_TEMPORARILY	= "MOVED_TEMPORARILY",
			#MULTIPLE_CHOICES	= "MULTIPLE_CHOICES",
			#USE_PROXY		= "USE_PROXY"
		;

	enumerationTemplate ServerErrorKind auto
		:	#BAD_GATEWAY		= "BAD_GATEWAY",
			#MESSAGE_TOO_LARGE	= "MESSAGE_TOO_LARGE",
			#NOT_IMPLEMENTED	= "NOT_IMPLEMENTED",
			#SERVER_INTERNAL_ERROR	= "SERVER_INTERNAL_ERROR",
			#SERVER_TIMEOUT		= "SERVER_TIMEOUT",
			#SERVICE_UNAVAILABLE	= "SERVICE_UNAVAILABLE",
			#VERSION_NOT_SUPPORTED	= "VERSION_NOT_SUPPORTED"
		;

	enumerationTemplate SIPHeader auto
		:	#CALL_ID		= "CALL_ID",
			#CONTACT		= "CONTACT",
			#CSEQ			= "CSEQ",
			#EVENT			= "EVENT",
			#FROM			= "FROM",
			#MAX_FORWARDS		= "MAX_FORWARDS",
			#SUBSCRIPTION_STATE	= "SUBSCRIPTION_STATE",
			#TO			= "TO",
			#VIA			= "VIA"
		;

	enumerationTemplate PrimitiveType auto
		:	#void		= "void",
			#bool		= "bool",
			#int		= "int",
			#request	= "request",
			#response	= "response",
			#string		= "string",
			#time		= "time",
			#uri		= "uri"
		;

	symbols {
		lsquare		= "[";
		rsquare		= "]"	: rightSpace;
		excl		= "!";
		coma		= ","	: leftNone, rightSpace;
		lparen		= "(";
		rparen		= ")"	: leftNone, rightSpace;
		lcurly		= "{"	: leftSpace;
		rcurly		= "}"	: leftNone, rightSpace;
		semi		= ";"	: leftNone, rightSpace;
		colon		= ":"	: leftNone, rightSpace;
		colons		= "::";
		pipe		= "|"	: leftSpace, rightSpace;
		sharp		= "#"	: leftSpace;
		qmark		= "?";

		-- operator symbols
		point		= "."	: leftNone;
		rarrow		= "->"	: leftNone;
		minus		= "-"	: leftSpace, rightSpace;
		star		= "*"	: leftSpace, rightSpace;
		slash		= "/"	: leftSpace, rightSpace;
		plus		= "+"	: leftSpace, rightSpace;
		eq		= "="	: leftSpace, rightSpace;
		eqeq		= "==";
		gt		= ">"	: leftSpace, rightSpace;
		lt		= "<"	: leftSpace, rightSpace;
		ge		= ">="	: leftSpace, rightSpace;
		le		= "<="	: leftSpace, rightSpace;
		ne		= "!="	: leftSpace, rightSpace;
		larrow		= "<-"	: leftSpace, rightSpace;
		ampamp		= "&&";
		pipepipe	= "||";
	}

	operators {
		priority 0 {	-- 0 is highest
--			opPoint = point, 2;
--			opRarrow = rarrow, 2;
			opWith = "with", 2;
		}

		priority 1 {
			opNot = excl, 1;		-- no corresponding symbol => symbol is the keyword defined by the quoted string (which is also the name)
			opMinus1 = minus, 1;
		}

		priority 2 {
			opStar = star, 2;
			opSlash = slash, 2;
		}

		priority 3 {
			opPlus = plus, 2;
			opMinus2 = minus, 2;
		}

		priority 4 {
			opEq = eqeq, 2;
			opGt = gt, 2;
			opLt = lt, 2;
			opGe = ge, 2;
			opLe = le, 2;
			opNe = ne, 2;
		}

		priority 5 {
			opAnd = ampamp, 2;
			opOr = pipepipe, 2;
		}

		priority 6 {
			opMatch = "match", 2;
			opNoMatch = "nomatch", 2;
		}
	}

	token NAME	:	word(
					start = [alpha] | "_",
					part = [alnum] | "_"
					, words = ("true" : BOOLEAN, "false" : BOOLEAN)
				);
	token COMMENT	:	endOfLine(start = "//") | multiLine(start = "/*", end = "*/");
	token URI	:	multiLine(start = "\'", end = "\'");
	token HEADERID	:	word(
					start = "#",
					part = [alnum] | "_" | "!" | "%" | "*" | "-" | "+" | "'" | "`" | "~",
					end = ":"
				);

	lexer = "
%options testLiterals = false;
NL
	:	(	'\\r' '\\n'
		|	'\\n' '\\r'	//Improbable
		|	'\\r'
		|	'\\n'
		)
	{newline();}
	;

WS
	:	(	' '
		|	'\\t'
		)
	;

%protected
DIGIT
	:	'0'..'9'
	;

INT
	:	(DIGIT)+
	;


%protected
ESC
	:	'\\\\'!
		(	'n' %v2{%setText(\"\\n\");}
		|	'r' %v2{%setText(\"\\r\");}
		|	't' %v2{%setText(\"\\t\");}
		|	'b' %v2{%setText(\"\\b\");}
		|	'f' %v2{%setText(\"\\f\");}
		|	'\"' %v2{%setText(\"\\\"\");}
		|	'\\.' %v2{%setText(\".\");}	// SPL-specific
		|	'\\'' %v2{%setText(\"\\'\");}
		|	'\\\\' %v2{%setText(\"\\\\\");}
		|	(
				('0'..'3')
				(
%v2					options {
%v2						warnWhenFollowAmbig = false;
%v2					}
				:	('0'..'7')
					(
%v2						options {
%v2							warnWhenFollowAmbig = false;
%v2						}
					:	'0'..'7'
					)?
				)?
			|	('4'..'7')
				(
%v2					options {
%v2						warnWhenFollowAmbig = false;
%v2					}
				:	('0'..'7')
				)?
			)
				{
%v2					String s = %getText;
%v2					int i;
%v2					int ret = 0;
%v2					String ans;
%v2					for (i=0; i<s.length(); ++i)
%v2						ret = ret*8 + s.charAt(i) - '0';
%v2					ans = String.valueOf((char) ret);
%v2					%setText(ans);
				}
		)
	;

STRING
	:	'\\\"'!
		(	ESC
		|	'\\n' {newline();}
		|	~('\\\\'|'\\\"'|'\\n')
		)*
		'\\\"'!
%v3		{setText(ei.unescapeString(getText(), 1));}
	;
	";

}