UnreachableSymbols visitor

alib2algo/src/grammar/properties/UnreachableSymbols.cpp

@@ -17,7 +17,9 @@
 #include <grammar/Regular/RightLG.h>
 #include <grammar/Regular/RightRG.h>
-#include <std/set.hpp>
+#include <algorithm>
+#include <deque>
+#include <set>
 namespace grammar {
@@ -65,6 +67,75 @@ template std::set<alphabet::Symbol> UnreachableSymbols::getUnreachableSymbols( c
 template std::set<alphabet::Symbol> UnreachableSymbols::getUnreachableSymbols( const grammar::RightLG & grammar );
 template std::set<alphabet::Symbol> UnreachableSymbols::getUnreachableSymbols( const grammar::RightRG & grammar );
+std::set<alphabet::Symbol> UnreachableSymbols::getUnreachableSymbols(const grammar::Grammar& grammar) {
+	std::set<alphabet::Symbol> out;
+	grammar.getData().Accept((void*) &out, UnreachableSymbols::UNREACHABLE_NONTERMINALS);
+	return out;
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::LeftLG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::LeftRG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::RightLG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::RightRG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::LG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::CFG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::EpsilonFreeCFG& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::CNF& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void* data, const grammar::GNF& grammar) const {
+	std::set<alphabet::Symbol> & out = *((std::set<alphabet::Symbol>*) data);
+	out = std::move(this->getUnreachableSymbols(grammar));
+}
+
+void UnreachableSymbols::Visit(void*, const grammar::CSG&) const {
+	throw exception::AlibException("Unsupported grammar type CSG");
+}
+
+void UnreachableSymbols::Visit(void*, const grammar::NonContractingGrammar&) const {
+	throw exception::AlibException("Unsupported grammar type NonConctractingGrammar");
+}
+
+void UnreachableSymbols::Visit(void*, const grammar::ContextPreservingUnrestrictedGrammar&) const {
+	throw exception::AlibException("Unsupported grammar type ContextPreservingUnrestrictedGrammar");
+}
+
+void UnreachableSymbols::Visit(void*, const grammar::UnrestrictedGrammar&) const {
+	throw exception::AlibException("Unsupported grammar type UnrestrictedGrammar");
+}
+
+const UnreachableSymbols UnreachableSymbols::UNREACHABLE_NONTERMINALS;
+
 } /* namespace properties */
 } /* namespace grammar */

alib2algo/src/grammar/properties/UnreachableSymbols.h

@@ -8,12 +8,7 @@
 #ifndef UNREACHABLE_SYMBOLS_H_
 #define UNREACHABLE_SYMBOLS_H_
-#include <algorithm>
-#include <deque>
-#include <set>
-
-#include <exception/AlibException.h>
-
+#include <grammar/Grammar.h>
 #include <alphabet/Symbol.h>
 namespace grammar {
@@ -23,14 +18,32 @@ namespace properties {
 /**
  * Implements algorithms from Melichar, chapter 3.3
  */
-class UnreachableSymbols {
+class UnreachableSymbols : public grammar::VisitableGrammarBase::const_visitor_type {
 public:
+	static std::set<alphabet::Symbol> getUnreachableSymbols( const grammar::Grammar & grammar );
+
 	/**
 	 * Implements
 	 */
 	template<class T>
 	static std::set<alphabet::Symbol> getUnreachableSymbols( const T & grammar );
+private:
+	void Visit(void*, const grammar::LeftLG& grammar) const;
+	void Visit(void*, const grammar::LeftRG& grammar) const;
+	void Visit(void*, const grammar::RightLG& grammar) const;
+	void Visit(void*, const grammar::RightRG& grammar) const;
+	void Visit(void*, const grammar::LG& grammar) const;
+	void Visit(void*, const grammar::CFG& grammar) const;
+	void Visit(void*, const grammar::EpsilonFreeCFG& grammar) const;
+	void Visit(void*, const grammar::CNF& grammar) const;
+	void Visit(void*, const grammar::GNF& grammar) const;
+	void Visit(void*, const grammar::CSG& grammar) const;
+	void Visit(void*, const grammar::NonContractingGrammar& grammar) const;
+	void Visit(void*, const grammar::ContextPreservingUnrestrictedGrammar& grammar) const;
+	void Visit(void*, const grammar::UnrestrictedGrammar& grammar) const;
+
+	static const UnreachableSymbols UNREACHABLE_NONTERMINALS;
 };
 } /* namespace properties */