grammar.g

header {
	#include <libwccl/parser/ParserException.h>

	#include <cstdio>
	#include <antlr/Token.hpp>
	#include <boost/lexical_cast.hpp>

	// values/variables
	#include <libwccl/variables.h>
	#include <libwccl/values/bool.h>
	#include <libwccl/values/tset.h>
	#include <libwccl/values/strset.h>
	#include <libwccl/values/position.h>
	#include <libwccl/values/positionref.h>
	
	// sentence context
	#include <libwccl/sentencecontext.h>

	// operators
	#include <libwccl/ops/and.h>
	#include <libwccl/ops/affix.h>
	#include <libwccl/ops/toupper.h>
	#include <libwccl/ops/tolower.h>
	#include <libwccl/ops/constant.h>
	#include <libwccl/ops/functions.h>
	#include <libwccl/ops/logicalpredicate.h>

	// Unicode String
	#include <unicode/uniset.h>
	#include <unicode/unistr.h>
}

options {
	language = "Cpp";
}

// ----------------------------------------------------------------------------
// ANTLR PARSER
// ----------------------------------------------------------------------------
class ANTLRParser extends Parser;
options {
	k = 6;
	exportVocab = ANTLRExpr;
	buildAST = false;
	defaultErrorHandler = false;
}
{
private:
	// 
	const UnicodeString token_ref_to_ustring(antlr::RefToken& rstr) const { 
		return UnicodeString::fromUTF8(((antlr::Token*)rstr)->getText()).unescape();
	}
	//
	const std::string token_ref_to_std_string(antlr::RefToken& rstr) const { 
		return (((antlr::Token*)rstr)->getText());
	}
	//
	int token_ref_to_int(antlr::RefToken& rstr) { 
		return atoi(((antlr::Token*)rstr)->getText().c_str());
	}

	// hepls function for processing
	boost::shared_ptr<Wccl::Function<Wccl::StrSet> > get_str_set_expr(
		boost::shared_ptr<Wccl::StrSet> ret_str_set)
	{
		boost::shared_ptr<Wccl::Function<Wccl::StrSet> > strset_expr(
			new Wccl::Constant<Wccl::StrSet>(*ret_str_set.get())
		);

		return strset_expr;
	}

	Wccl::SentenceContext get_tmp_context() {
		boost::shared_ptr<Corpus2::Sentence> sentence;
		Wccl::SentenceContext sc(sentence);
		
		return sc;
	}
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------------
// Start all rules
/*
start_rules 
{
	std::string name = "";
}
	: values_ref       [name] { fprintf(stderr, "%s\n", name.c_str()); }
	| position_op			 [name] { fprintf(stderr, "%s\n", name.c_str()); }
	| filters_op			 [name] { fprintf(stderr, "%s\n", name.c_str()); }
	| setvar_op        [name] { fprintf(stderr, "%s\n", name.c_str()); }
	| boolean_op       [name] { fprintf(stderr, "%s\n", name.c_str()); }
	;
*/

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// "GLOBAL" RULES
// ----------------------------------------------------------------------------
// Rules for parsing string operators in scope (variables). 
// Returns boost::shared_ptr<Wccl::Function<Wccl::StrSet> >
parse_string_operator 
	returns [boost::shared_ptr<Wccl::Function<Wccl::StrSet> > res]
{
	Wccl::Variables vars;
}
	: res = string_operators [vars]
;
// ----------------------------------------------------------------------------
// Rules for parsing predicates in scope (variables). 
// Returns boost::shared_ptr<Wccl::Function<Wccl::Bool> > 
parse_predicates 
	returns [boost::shared_ptr<Wccl::Function<Wccl::Bool> > res]
{
	Wccl::Variables vars;
	boost::shared_ptr<Wccl::Bool> mret;
}
	: mret = predicates [vars, res]
;
// ----------------------------------------------------------------------------
// Rules for parsing values in scope (variables). 
// Returns boost::shared_ptr<Wccl::Value>
/*
parse_values 
	returns [boost::shared_ptr<Wccl::Value> ret]
{
	Wccl::Variables vars;
}
	: ret = values [vars]
;
*/

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// All values:
// Values can be use for setvar(...,..)
// ----------------------------------------------------------------------------
/*
values 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Constant<Wccl::Value> > res]
	: res = position [vars]
	| res = str_set  [vars]
	| res = sym_set  [vars]
	| res = boolean  [vars]
;
*/
// ----------------------------------------------------------------------------
// Values reference => values + position_ref 
// !! Cannot use for setvar(...,...) !!
/*
values_ref [std::string& name]:
	  values       [name]
	| position_ref [name]
	| boolean_ref  [name]
	;
*/
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// Position: $0name
// ----------------------------------------------------------------------------
// TODO Cos nie lapie dobrze implementacja!!! Moze jakas dodatkowa
// TODO regula do lexera?
position 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Constant<Wccl::Position> > op]
{
	boost::shared_ptr<Wccl::Position> val;
}
	: DOLLAR "0" n: SYMBOL { 
		val = vars.get_put<Wccl::Position>(token_ref_to_std_string(n)); 	
		op.reset(new Wccl::Constant<Wccl::Position>(*val.get()));
	}
;
// ----------------------------------------------------------------------------
// Position reference: $(0-9)+name
// !! Cannot use for setvar(...,...) !!
/*
position_ref 
	[Wccl::Variables& vars]
	returns [boost::shared_ptr<Wccl::PositionRef> val]
	: DOLLAR p_ref: INT n: SYMBOL { 
		val.reset(
			new Wccl::PositionRef(
				vars.get_put<Wccl::Position>(token_ref_to_std_string(n)),
				token_ref_to_int(p_ref)
			)
		);
	}
;
*/
// ----------------------------------------------------------------------------
// String set, call examples: $name, $Name, $_name, $_Name etc.
// This expression gets variable of tyme StrSet from string-named variable 
// Returns Wccl::Function<Wccl::StrSet> from Set-variables
str_set 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Constant<Wccl::StrSet> > op]
{
	boost::shared_ptr<Wccl::StrSet> val;
}
	:	DOLLAR n: SYMBOL {
		val = vars.get_put<Wccl::StrSet>(token_ref_to_std_string(n));
		op.reset(new Wccl::Constant<Wccl::StrSet>(*val.get()));
	}
;
// ----------------------------------------------------------------------------
// Symbol set: $$name
sym_set 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Constant<Wccl::TSet> > op]
{
	boost::shared_ptr<Wccl::TSet> val;
}
	: DOLLAR DOLLAR n: SYMBOL { 
			val = vars.get_put<Wccl::TSet>(token_ref_to_std_string(n)); 	
			op.reset(new Wccl::Constant<Wccl::TSet>(*val.get()));
	}
;
// ----------------------------------------------------------------------------
// Bool: $?name
/*
boolean 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Constant<Wccl::Bool> > op]
{
	boost::shared_ptr<Wccl::Bool> val;
}
	: DOLLAR Q_MARK n: SYMBOL { 
			val = vars.get_put<Wccl::Bool>(token_ref_to_std_string(n)); 	
			op.reset(new Wccl::Constant<Wccl::Bool>(*val.get()));
	}
;
*/
// Boolean $!name
/*
boolean_ref [std::string& name]:
	  DOLLAR E_MARK n1: SYMBOL { name = token_ref_to_std_string(n1); }
	;
*/

/////////////////////////////////////////////////////////////////////////////////////
// OPERATORS
/////////////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------------
// Positions operator
// TODO range przyjmuje postion_ref. ?? Zmienic na position ??
/*
position_op [std::string& name]
{
	std::string r1, r2;
}
	: "flex"  LBRACKET position_ref [name] RBRACKET
	| "range" LPAREN s: SYMBOL COMMA position_ref [r1] COMMA position_ref [r2] RPAREN 
		{ name = ("Range opertator from " + token_ref_to_std_string(s) + " [" + r1 + ":" + r2 + "]!"); }
	;
*/
// ----------------------------------------------------------------------------------
// Filtering operator
/*
filters_op [std::string& name]
{
	std::string p, p2, e1, e2;
}
	: "catflt" LPAREN position_ref [p] COMMA es_any [e1] COMMA es_any [e2] RPAREN
		{ name = ( "Catflt operator in position " + p + " for sets " + e1 + " " + e2); }
  | "agrflt" LPAREN position_ref [p] COMMA position_ref [p2] COMMA es_any [e1] COMMA i: INT RPAREN
		{ name = ( "Agrflt operator p1 " + p + " p2 " + p2 + " for set " + e1 + " aggr_attrs " + token_ref_to_std_string(i)); }
	;
*/

// ----------------------------------------------------------------------------------
// Setvar operator
/*
setvar_op [std::string& value]
	: setvar_pos  [value]
	| setvar_bool [value]
	| setvar_sset [value]
	| setvar_tset [value]
	;
*/

// setvar dla position przyjmuje position_ref -> TODO sprawdzic dlaczego
// gramatyka nie pokrywa "setvar" LPAREN position COMMA position_v RPAREN
/*
setvar_pos [std::string& value]
	: "setvar" LPAREN position_ref [value] COMMA position_v [value] RPAREN
//	: "setvar" LPAREN position [value] COMMA position_v [value] RPAREN
	;
*/
/*
setvar_bool [std::string& value]
	: "setvar" LPAREN boolean [value] COMMA boolean_v [value] RPAREN 
	;
*/
/*
setvar_sset [std::string& value]
	: "setvar" LPAREN str_set [value] COMMA str_set_v [value] RPAREN 
	;
*/
/*
setvar_tset [std::string& value]
	: "setvar" LPAREN sym_set [value] COMMA sym_set_v [value] RPAREN 
	;
*/

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// VALUES
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// Single or muliple values in string set
str_set_v_in 
	[boost::shared_ptr<Wccl::StrSet>& s_set]
  : v1: STRING { s_set->insert(token_ref_to_ustring(v1)); }
  | v2: STRING COMMA str_set_v_in [s_set] {
    s_set->insert(token_ref_to_ustring(v2)); 
  }
;
// string set, called as unnamed (temporary) StrSet: 
// 	calls: [] ['a'] ['a', 'b'] ["a"] ["a", "b"] ['a', "b"] or variable $A
str_set_v 
	[Wccl::Variables& vars]
	returns [boost::shared_ptr<Wccl::Constant<Wccl::StrSet> > val]
{
	boost::shared_ptr<Wccl::StrSet> set(new Wccl::StrSet);
}
	: LBRACKET RBRACKET { 
		val.reset(new Wccl::Constant<Wccl::StrSet>(*set.get()));
	}
	| LBRACKET str_set_v_in [set] RBRACKET {
		val.reset(new Wccl::Constant<Wccl::StrSet>(*set.get()));
	}
	| val = str_set [vars]
	;
// ----------------------------------------------------------------------------
// element of sym set 
/*
sym_set_elem_s [std::string& value]
	: s1: SYMBOL                              { value += token_ref_to_std_string(s1); }
	| s2: SYMBOL COMMA sym_set_elem_s [value] { value += token_ref_to_std_string(s2); }
	| s3: SYMBOL COMMA sym_set_elem_g [value] { value += token_ref_to_std_string(s3); }
	;
*/
// element of sym set 
/*
sym_set_elem_g [std::string& value]
	: G_MARK s1: SYMBOL G_MARK                              { value += token_ref_to_std_string(s1); }
	| G_MARK s2: SYMBOL G_MARK COMMA sym_set_elem_g [value] { value += token_ref_to_std_string(s2); }
	| G_MARK s3: SYMBOL G_MARK COMMA sym_set_elem_s [value] { value += token_ref_to_std_string(s3); }
	;
*/
// sym set in
/*
sym_set_in [std::string& value]
	: sym_set_elem_s [value]
	| sym_set_elem_g [value] 
	;
*/
// sym set {} {a} {a, b}
/*
sym_set_v [std::string& value]
	: LCURLY RCURLY
	| LCURLY sym_set_in [value] RCURLY
	;
*/
// ----------------------------------------------------------------------------
// boolean:
/*
boolean_v 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Bool> val]
	: "True"  { val.reset(new Wccl::Bool(true )); }
	| "False" { val.reset(new Wccl::Bool(false)); }
	| val = boolean [vars]
;
*/
// ----------------------------------------------------------------------------
// position value:
/*
position_v [std::string& value]
	: i: INT							{ value = token_ref_to_std_string(i); }
	| "begin"							{ value = "begin"; }
	| "end"								{ value = "end"; }
	| "nowhere"						{ value = "nowhere"; }
	| position [value]
	;
*/
// ----------------------------------------------------------------------------
// internal values:
/*
v_literal  [std::string& value]
	: s1: STRING { value = token_ref_to_std_string(s1); }
	| s2: SYMBOL { value = token_ref_to_std_string(s2); }
	;
*/
/////////////////////////////////////////////////////////////////////////////////////
// constants
// set of values
/*
st::shared_ptr<Wccl::StrSet> ret]s_literal [std::string& v]
	: LBRACKET ((v_literal[v]) (COMMA v_literal [v])*)? RBRACKET
	;
*/

// comma-separated predicates
/*
seq_et [std::string& v]:
	  et_any [v] (COMMA et_any [v])*
    ;
*/
/*
es_any [Wccl::Variables& vars] returns [boost::shared_ptr<Wccl::StrSet> ret]
	  s_literal [v]
	| es_op     [v]
	;
*/
/*
et_bool [std::string& v]:
	  boolean    [v]
	| boolean_op [v]
	;
*/

// set relations
/*
et_set [std::string& v]
{
	std::string v1, v2;
}
	: "in"    LPAREN es_any [v1] COMMA es_any [v2] RPAREN { v = ("name " + v1 + " " + v2); }
	| "inter" LPAREN es_any [v1] COMMA es_any [v2] RPAREN { v = ("inter " + v1 + " " + v2); }
	| "equal" LPAREN es_any [v1] COMMA es_any [v2] RPAREN { v = ("equal " + v1 + " " + v2); }
	;
*/
/*
et_string [std::string& v]
	: "isbig"  LPAREN es_any [v] RPAREN 
	| "hasnum" LPAREN es_any [v] RPAREN
	;
*/
/*
et_action [std::string& v]
{
	std::string v1, v2;
}
	: "delete"   LPAREN et_any [v] RPAREN 
	| "select"   LPAREN et_any [v] RPAREN 
	| "relabel"  LPAREN es_any [v1] COMMA et_any [v2] RPAREN { v = ("relabel " + v1 + " " + v2); }
	| "unify"    LPAREN es_any [v1] COMMA i: INT RPAREN      { v = ("relabel " + v1 + " on position " + token_ref_to_std_string(i)); }
	| "mark"     LPAREN s1: SYMBOL RPAREN { v = ("mark "     + token_ref_to_std_string(s1)); }
	| "unmark"   LPAREN s2: SYMBOL RPAREN { v = ("unmark "   + token_ref_to_std_string(s2)); }
	| "startnew" LPAREN s3: SYMBOL RPAREN { v = ("startnew " + token_ref_to_std_string(s3)); }
	| "lextend"  LPAREN s4: SYMBOL RPAREN { v = ("lextend "  + token_ref_to_std_string(s4)); }
	| "rextend"  LPAREN s5: SYMBOL RPAREN { v = ("rextend "  + token_ref_to_std_string(s5)); }
	;
*/
/*
et_iter [std::string& v]
{
	std::string v1, v2, v3, v4;
}
	: "only"    LPAREN position_ref [v1] COMMA position_ref [v2] COMMA position_ref [v3] COMMA et_any [v4] RPAREN
	| "atleast" LPAREN position_ref [v1] COMMA position_ref [v2] COMMA position_ref [v3] COMMA et_any [v4] COMMA i:INT RPAREN
	| "llook"   LPAREN position_ref [v1] COMMA position_ref [v2] COMMA position_ref [v3] COMMA et_any [v4] RPAREN
	| "rlook"   LPAREN position_ref [v1] COMMA position_ref [v2] COMMA position_ref [v3] COMMA et_any [v4] RPAREN
	| "setvar"  LPAREN position_ref [v1] COMMA position_ref [v2] RPAREN
	| "lskip"   LPAREN position_ref [v1] COMMA SYMBOL COMMA position_ref [v2] COMMA et_any [v3] RPAREN
	| "lphrase" LPAREN position_ref [v1] COMMA SYMBOL COMMA position_ref [v2] RPAREN
	| "rphrase" LPAREN position_ref [v1] COMMA SYMBOL COMMA position_ref [v2] RPAREN
	| "accept"  LPAREN seq_et [v1] RPAREN
	;
*/

// predicates checking agreement
/*
et_agr [std::string& name]
{
	std::string p1, p2, v;
}
	: "agr"   LPAREN position_ref [p1] COMMA position_ref [p2] COMMA es_any [v] COMMA i1: INT RPAREN
	| "agrpp" LPAREN position_ref [p1] COMMA position_ref [p2] COMMA es_any [v] COMMA i2: INT RPAREN
	| "wagr"  LPAREN position_ref [p1] COMMA position_ref [p2] COMMA es_any [v] COMMA i3: INT RPAREN
	;
*/
/*
// annotation checking predicates
et_annot [std::string& v]
	: "phrase" LPAREN position_ref [v] COMMA s: SYMBOL RPAREN 
	;
*/
/*
// constraints 
et_any [std::string& v]
	: et_bool   [v]
	| et_set    [v]
	| et_string [v]
	| et_action [v]
	| et_iter   [v]
	| et_agr    [v]
	| et_annot  [v]
	;
*/

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// Stiring operators returns boost::shared_ptr<Wccl::Function<Wccl::StrSet> >
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
string_operators 
	[Wccl::Variables& vars]
	returns [boost::shared_ptr<Wccl::Function<Wccl::StrSet> > ret]
	/*
	: ret = op_orth [vars] 
	| ret = op_base [vars]
	*/ 
	: ret = op_lower  [vars] 
	| ret = op_upper  [vars]
	| ret = op_affix  [vars] 
	| ret = str_set_v [vars]
;
// Implementations of string operators:
// ----------------------------------------------------------------------------
/*
op_orth [Wccl::Variables& vars] returns [boost::shared_ptr<Wccl::StrSet> ret]
{
	boost::shared_ptr<Wccl::PositionRef> tmpPosRef;
}
	: "orth" LBRACKET tmpPosRef = position_ref [vars] RBRACKET { 
		// TODO
	}
;
*/
// ----------------------------------------------------------------------------
/*
op_base [Wccl::Variables& vars] returns [boost::shared_ptr<Wccl::StrSet> ret]
{
	boost::shared_ptr<Wccl::PositionRef> tmpPosRef;
}
	: "base" LBRACKET tmpPosRef = position_ref [vars] RBRACKET { 
		// TODO
	}
;
*/
// ----------------------------------------------------------------------------
// returns boost::shared_ptr<Wccl::Function<Wccl::StrSet> >
op_lower 
	[Wccl::Variables& vars] returns 
	[boost::shared_ptr<Wccl::Function<Wccl::StrSet> > ret]
{
	boost::shared_ptr<Wccl::Function<Wccl::StrSet> > o_ret;
}
	: "lower" LPAREN o_ret = string_operators[vars] RPAREN {
		ret.reset(new Wccl::ToLower(o_ret));
	}
;
// ----------------------------------------------------------------------------
op_upper 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Function<Wccl::StrSet> > ret]
{
	boost::shared_ptr<Wccl::Function<Wccl::StrSet> > o_ret;
}
	: "upper" LPAREN o_ret = string_operators[vars] RPAREN {
		ret.reset(new Wccl::ToUpper(o_ret));
	}
;
// ----------------------------------------------------------------------------
op_affix 
	[Wccl::Variables& vars] 
	returns [boost::shared_ptr<Wccl::Function<Wccl::StrSet> > ret]
{
	boost::shared_ptr<Wccl::Function<Wccl::StrSet> > o_ret;
}
	: "affix" LPAREN o_ret = string_operators[vars] COMMA offset: INT RPAREN {
		ret.reset(new Wccl::Affix(o_ret, token_ref_to_int(offset)));
	}
;
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// Predicates returns boost::shared_ptr<Wccl::Function<Wccl::Bool> >
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
predicates 
	[Wccl::Variables& vars, boost::shared_ptr<Wccl::Function<Wccl::Bool> >& pr] 
	returns [boost::shared_ptr<Wccl::Bool> ret] 
	: ret = logical_predicates [vars, pr]
;
// Implementations of predicates:
// ----------------------------------------------------------------------------
logical_predicates
	[Wccl::Variables& vars, boost::shared_ptr<Wccl::Function<Wccl::Bool> >& pr]
	returns [boost::shared_ptr<Wccl::Bool> ret]
{
	boost::shared_ptr<Wccl::LogicalPredicate::BoolFunctionPtr> v;
}
	: ret = lpred_and [vars]  {
		// pr.reset(new Wccl::And(v));
	}
;
// ----------------------------------------------------------------------------
lpred_and 
	[Wccl::Variables& vars]
	returns [boost::shared_ptr<Wccl::Bool> ret]
{
	boost::shared_ptr<Wccl::Function<Wccl::Bool> > tmpPr;
}
	: "and" LPAREN ret = logical_predicates [vars, tmpPr] (COMMA ret = logical_predicates [vars, tmpPr])* RPAREN 
;

/*
lpred_not

lpred_or
*/
/*
boolean_op [std::string& name]
	: "and" LPAREN seq_et [name] RPAREN 
	| "not" LPAREN seq_et [name] RPAREN
	| "or"  LPAREN seq_et [name] RPAREN 
	;
*/

// ----------------------------------------------------------------------------------
// ANTLR LEXER
// ----------------------------------------------------------------------------------
class ANTLRLexer extends Lexer;
options {
	k              = 2;
	exportVocab    = ANTLRExpr;
	charVocabulary = '\3'..'\377';
	testLiterals   = false;
}

STRING
options {
	paraphrase = "a string";
}
	:    '"' (~'"')* '"'
	|    '\'' (~'\'')* '\''
	;

// STRING_APOS
// options {
// 	paraphrase = "a string without apostrophe";
// }
// 	:	(~'"')* 
// ;

// STRING_QUOT
// options {
// 	paraphrase = "a string without quotation";
// }
// 	:	(~'\'')* 
//	;


INT
options {
	paraphrase = "Integer";
}
	: ('-'|'+')?('0'..'9')+
	;	

QUOT_MARK
options {
	paraphrase = "Quota mark";
}
	: '\''
	;

APOS_MARK
options {
	paraphrase = "Aposptrophe mark";
}
	: '"'
	;


Q_MARK
options {
	paraphrase = "Query mark";
}
	: '?'
	;

E_MARK
options {
	paraphrase = "Exclamanation mark";
}
	: '!'
	;

G_MARK
options {
	paraphrase = "Gravis mark";
}
	: '`'
	;

LBRACKET 
options {
	paraphrase = "'['";
}
	: '[' 
	;

RBRACKET 
options {
	paraphrase = "']'";
}
	: ']' 
	;

LPAREN
options {
	paraphrase = "'('";
}   
	: '(' 
	;

RPAREN 
options {
	paraphrase = "')'";
} 
	: ')' 
	;

LCURLY 
options {
	paraphrase = "'{'";
} 
	: '{' 
	;

RCURLY 
options {
	paraphrase = "'}'";
} 
	: '}' 
	;

DOLLAR 
options {
	paraphrase = "'$'";
} 
	: '$' 
	;

AT_MARK 
options {
	paraphrase = "'@'";
} 
	: '@' 
	;

COMMA
options { 
	paraphrase = "','"; 
}
	: ','
	;

SYMBOL
options { 
	paraphrase = "symbol"; 
	testLiterals = true; 
}
	: ( 'a'..'z' | 'A'..'Z' | '_' ) ( 'a'..'z' | 'A'..'Z' | '_' | '0'..'9' )*
	;

WS
	:
	( ' '
	| '\t'
	| '\r' '\n' {newline(); }
	| '\n' {newline(); } ) { $setType(antlr::Token::SKIP); } 
	;

COMMENT
options {
	paraphrase = "Comment";
}
	: "//" (~'\n')* '\n'{ $setType(antlr::Token::SKIP); newline(); }
	;

HASH
options { 
	paraphrase = "'#'"; 
}
	: '#' 
	;

DSEPARATOR
options { 
	paraphrase = "':-'"; 
}
	: ":-" 
	;