Added first example.

examples/true/trueArgGrammarScanner.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#if !defined(yyFlexLexerOnce)
+#	include <FlexLexer.h>
+#endif
+
+#include "trueArgGrammarDriver.hpp"
+#include <cstring>
+#include <optional>
+#include <sstream>
+
+namespace trueArgGrammar {
+	class Scanner : public yyFlexLexer {
+	public:
+		using Result = Driver::Result;
+
+		Scanner(int argc, char* argv[], Driver& driver);
+		virtual ~Scanner() = default;
+
+		using FlexLexer::yylex;
+
+		virtual int yylex(trueArgGrammar::Parser::semantic_type* const lval);
+		void resetOnWrap();
+		void setResult(Result result);
+
+	private:
+		int argc, argi;
+		char** argv;
+		Driver& driver;
+		std::stringstream streamInput;
+		std::optional<int> resetVal;
+		trueArgGrammar::Parser::semantic_type* yyval = nullptr;
+
+	protected:
+		int yywrap() override;
+	};
+} // namespace trueArgGrammar