diff --git a/libwccl/parser/Parser.cpp b/libwccl/parser/Parser.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..3fedb78ef0aa9c606e5c9ed67d1668b1673efdea
--- /dev/null
+++ b/libwccl/parser/Parser.cpp
@@ -0,0 +1,84 @@
+#include "Parser.h"
+
+/**
+ * @desc Parser constructor. Default tagset is NULL
+ */
+Parser::Parser(const Corpus2::Tagset& t) : tagset(t)
+{
+}
+
+/**
+ *
+ */
+Parser::~Parser()
+{
+ //
+}
+
+// ----------------------------------------------------------------------------
+
+/**
+ * @desc Overloaded parsing operator writed in string. Calls base method
+ * @arg str operator as string
+ * @return call method @see parserOperator(const std::istream&)
+ */
+/*
+std::string Parser::parseOperator(const std::string& str) const
+{
+ std::stringstream ss (std::stringstream::in | std::stringstream::out);
+ ss << str;
+
+ return this->parseOperator(ss);
+}
+*/
+/**
+ * @desc Base method for parsing operator in stream
+ * @arg istr input stream with operator
+ * @return Operator
+ */
+/*
+std::string Parser::parseOperator(std::istream& istr) const
+{
+ ANTLRLexer lexer(istr);
+ ANTLRParser parser(lexer);
+
+ return "Ala ma kota";
+}
+*/
+
+// -----------------------------------------------------------------------------
+
+/**
+ * @desc Overloaded parsing expression writed in string. Calls base method
+ * @arg str variables in string
+ */
+void Parser::parseExpression(const std::string& str) const
+{
+ std::stringstream ss (std::stringstream::in | std::stringstream::out);
+ ss << str;
+
+ return this->parseExpression(ss);
+}
+
+/**
+ * @desc Base method for parsing expression in stream
+ * @arg istr input stream with variable
+ * @return Operator
+ */
+void Parser::parseExpression(std::istream& istr) const
+{
+ ANTLRLexer lexer(istr);
+ ANTLRParser parser(lexer);
+
+ try {
+ parser.start_rules();
+
+ std::cerr << "Syntax ok!" << std::endl;
+ }
+ catch (ParserException e) {
+ std::cerr << e.info() << std::endl;
+ }
+ catch (...) {
+ std::cerr << "Syntax error!" << std::endl;
+ }
+}
diff --git a/libwccl/parser/Parser.h b/libwccl/parser/Parser.h
new file mode 100644
index 0000000000000000000000000000000000000000..08b06c3abc3c4a9ace1a74a5e9600b23b916b3c4
--- /dev/null
+++ b/libwccl/parser/Parser.h
@@ -0,0 +1,28 @@
+#ifndef PARSER_H
+#define PARSER_H
+
+#include <sstream>
+#include <libcorpus2/tagset.h>
+
+#include "ANTLRLexer.hpp"
+#include "ANTLRParser.hpp"
+
+#include "ParserException.h"
+
+// <libwccl>
+
+class Parser {
+public:
+ Parser(const Corpus2::Tagset&);
+ ~Parser();
+
+ // --------------------------------------------------------------------------
+ // FIXME
+ void parseExpression(const std::string&) const;
+ void parseExpression(std::istream& ) const;
+
+private:
+ const Corpus2::Tagset &tagset;
+};
+
+#endif // PARSER_H
diff --git a/libwccl/parser/ParserException.cpp b/libwccl/parser/ParserException.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..48aca90a0f3005eb7f38d16b078aaa22a8a93109
--- /dev/null
+++ b/libwccl/parser/ParserException.cpp
@@ -0,0 +1,6 @@
+#include "ParserException.h"
+
+ParserException::ParserException(std::string msg)
+{
+ this->msg = msg;
+}
diff --git a/libwccl/parser/ParserException.h b/libwccl/parser/ParserException.h
new file mode 100644
index 0000000000000000000000000000000000000000..b74923295ed48349a08f343a7734e5e173694bc8
--- /dev/null
+++ b/libwccl/parser/ParserException.h
@@ -0,0 +1,18 @@
+#ifndef PARSEREXCEPTION_H
+#define PARSEREXCEPTION_H
+
+#include <string>
+
+class ParserException
+{
+public:
+ ParserException(const std::string);
+
+ //
+ const std::string info() const { return this->msg; }
+
+private:
+ std::string msg;
+};
+
+#endif // PARSEREXCEPTION_H
diff --git a/libwccl/parser/grammar.g b/libwccl/parser/grammar.g
new file mode 100644
index 0000000000000000000000000000000000000000..b768eff1de0589b4e78d3d9554d01cae33d24636
--- /dev/null
+++ b/libwccl/parser/grammar.g
@@ -0,0 +1,498 @@
+header {
+ #include "ParserException.h"
+
+ // libwccl
+
+ #include <cstdio>
+ #include <antlr/Token.hpp>
+ #include <boost/lexical_cast.hpp>
+}
+
+options {
+ language = "Cpp";
+}
+
+// ----------------------------------------------------------------------------------
+// ANTLR PARSER
+// ----------------------------------------------------------------------------------
+class ANTLRParser extends Parser;
+options {
+ k = 6;
+ exportVocab = ANTLRExpr;
+ buildAST = false;
+ defaultErrorHandler = false;
+}
+{
+private:
+ //
+ const std::string token_ref_to_std_string(antlr::RefToken& rstr) {
+ return (((antlr::Token*)rstr)->getText());
+ }
+ const int token_ref_to_int(antlr::RefToken& rstr) {
+ return atoi(this->token_ref_to_std_string(rstr).c_str());
+ }
+}
+/////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////
+// ----------------------------------------------------------------------------------
+// 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()); }
+ | string_operators [name] { fprintf(stderr, "%s\n", name.c_str()); }
+ | boolean_op [name] { fprintf(stderr, "%s\n", name.c_str()); }
+ ;
+
+// ---------------------------------------------------------------------------------
+// values:
+// Walues can be use for setvar(...,..)
+values [std::string& name]:
+ position [name]
+ | str_set [name]
+ | sym_set [name]
+ | boolean [name]
+ ;
+//
+// Values reference => values + position_ref
+// !! Cannot use for setvar(...,...) !!
+values_ref [std::string& name]:
+ values [name]
+ | position_ref [name]
+ | boolean_ref [name]
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// Position: $0name
+position [std::string& name]:
+ DOLLAR "0" n: SYMBOL { name = token_ref_to_std_string(n); }
+ ;
+//
+// Position reference: $(0-9)+name
+// !! Cannot use for setvar(...,...) !!
+position_ref [std::string& name]:
+ DOLLAR INT n: SYMBOL { name = token_ref_to_std_string(n); }
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// String set: $name
+str_set [std::string& name]:
+ DOLLAR n: SYMBOL { name = token_ref_to_std_string(n); }
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// Sym set: $$name
+sym_set [std::string& name]:
+ DOLLAR DOLLAR n: SYMBOL { name = token_ref_to_std_string(n); }
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// Bool: $?name
+boolean [std::string& name]:
+ DOLLAR Q_MARK n1: SYMBOL { name = token_ref_to_std_string(n1); }
+ ;
+// 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
+/////////////////////////////////////////////////////////////////////////////////////
+// boolean:
+boolean_v [std::string& value]
+ : "True" { value = "True"; }
+ | "False" { value = "False"; }
+ | boolean[value]
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// 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]
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// string set in
+str_set_in [std::string& value]
+ : v1: STRING { value += token_ref_to_std_string(v1); }
+ | v2: STRING COMMA str_set_in [value] { value += (", " + token_ref_to_std_string(v2)); }
+ ;
+// string set [] ['a'] ['a', 'b'] ["a"] ["a", "b"] ['a', "b"]
+str_set_v [std::string& value]
+ : LBRACKET RBRACKET
+ | LBRACKET str_set_in[value] RBRACKET
+ ;
+/////////////////////////////////////////////////////////////////////////////////////
+// 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
+ ;
+
+/////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////
+// 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
+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 [std::string& v]:
+ s_literal [v]
+ | es_op [v]
+ ;
+
+es_op [std::string& v]:
+ position_ref [v]
+ | filters_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]
+ ;
+
+/////////////////////////////////////////////////////////////////////////////////////
+// OERATORS
+/////////////////////////////////////////////////////////////////////////////////////
+// Operators returns str_set: orth[$-2P]
+string_operators [std::string& name]
+ : op_orth [name]
+ | op_base [name]
+ | op_lower [name]
+ | op_upper [name]
+ | op_affix [name]
+;
+
+op_orth [std::string& name]
+ : "orth" LBRACKET position_ref [name] RBRACKET { name = "Orth operator!"; }
+ ;
+
+op_base [std::string& name]
+ : "base" LBRACKET position_ref [name] RBRACKET { name = "Base operator!"; }
+ ;
+
+op_lower [std::string& name]
+ : "lower" LPAREN str_set [name] RPAREN { name = "Lower operator!"; }
+ | "lower" LPAREN str_set_v [name] RPAREN { name = "Lower operator!"; }
+ ;
+
+op_upper [std::string& name]
+ : "upper" LPAREN str_set [name] RPAREN { name = "Upper operator!"; }
+ | "upper" LPAREN str_set_v [name] RPAREN { name = "Upper operator!"; }
+ ;
+
+op_affix [std::string& name]
+ : "affix" LPAREN str_set [name] COMMA n1: INT RPAREN { name = "Affix operator " + token_ref_to_std_string(n1) + "!"; }
+ | "affix" LPAREN str_set_v [name] COMMA n2: INT RPAREN { name = "Affix operator " + token_ref_to_std_string(n2) + "!"; }
+ ;
+
+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";
+}
+ : '"' (~'"')* '"'
+ | '\'' (~'\'')* '\''
+ ;
+
+INT
+options {
+ paraphrase = "Integer";
+}
+ : ('-'|'+')?('0'..'9')+
+ ;
+
+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 = "':-'";
+}
+ : ":-"
+ ;