fix ordering of regexps

alib2/src/regexp/RegExp.cpp

@@ -135,9 +135,10 @@ std::ostream& operator <<(std::ostream& out, const RegExp& regExp) {
 }
 bool RegExp::operator<(const RegExp& other) const {
-	if(*this == other) return false;
 	if(*(this->regExp) < *(other.regExp)) {
 	  return true;
+	} else if(*(this->regExp) > *(other.regExp)) {
+	  return false;
 	} else {
 	  return this->alphabet < other.alphabet;
 	}

alib2/src/regexp/RegExpElement.cpp

@@ -34,27 +34,27 @@ bool RegExpElement::operator!=(const RegExpElement& other) const {
 bool RegExpElement::operator<(const Concatenation& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }
 bool RegExpElement::operator<(const Alternation& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }
 bool RegExpElement::operator<(const Iteration& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }
 bool RegExpElement::operator<(const RegExpSymbol& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }
 bool RegExpElement::operator<(const RegExpEpsilon& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }
 bool RegExpElement::operator<(const RegExpEmpty& other) const {
-	return typeid(this).before(typeid(other));
+	return typeid(*this).before(typeid(other));
 }