Added first example.

examples/true/true.ll

@@ -0,0 +1,85 @@
+%{
+#include <stdexcept>
+#include "trueArgGrammarParser.tab.hh"
+
+#include "trueArgGrammarScanner.hpp"
+#undef YY_DECL
+#define YY_DECL int trueArgGrammar::Scanner::yylex(trueArgGrammar::Parser::semantic_type* const lval)
+
+using token = trueArgGrammar::Parser::token;
+%}
+
+%option debug
+%option nodefault
+%option yyclass="trueArgGrammar::Scanner"
+%option noyywrap
+%option c++
+%option outfile="trueArgGrammarScannerDef.cpp"
+
+%x SHORT_ARGUMENTS ARGUMENT_VALUE POSITIONAL_ARGUMENTS
+
+%%
+
+%{	/** Code executed at the beginning of yylex **/
+	yyval = lval;
+%}
+
+<INITIAL>-- { /* end of arguments */
+	BEGIN(POSITIONAL_ARGUMENTS);
+}
+
+<INITIAL>-/. {
+	BEGIN(SHORT_ARGUMENTS);
+	resetVal = INITIAL;
+}
+
+	/** Default arguments implemented for all parsers **/
+
+<INITIAL>--help {
+	return token::ARGUMENT_HELP_LONG;
+}
+
+<INITIAL>--version {
+	return token::ARGUMENT_VERSION_LONG;
+}
+
+<INITIAL>--[[:alnum:]][[:alnum:]\-]* {
+	std::cerr << "Unknown argument: \'" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+<INITIAL>--.+ { /* show common error for invalid option */
+	std::cerr << "Invalid argument: \'" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+<SHORT_ARGUMENTS>. {
+	std::cerr << "Unknown argument \'-" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+<POSITIONAL_ARGUMENTS>.+ {
+	std::cerr << "Unknown positional argument \'" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+<INITIAL>[^\-].* { /* unknown positional argument */
+	std::cerr << "Unknown positional argument \'" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+<INITIAL>. {
+	std::cerr << "Invalid character \'" << yytext << "\' found\n";
+	setResult(Result::wrongArgument);
+}
+
+%%
+
+namespace trueArgGrammar {
+void Scanner::resetOnWrap() {
+	if (resetVal)
+		BEGIN(*resetVal);
+
+	resetVal = INITIAL;
+}
+}