Add semantic passes

source/lexer.ll

@@ -3,10 +3,10 @@
 #define YY_USER_ACTION this->location.columns(yyleng);
 
 #include <sstream>
-#include "parser.hpp"
+#include "parser.hh"
 
 #undef YY_DECL
-#define YY_DECL yy::parser::symbol_type elna::source::lexer::lex()
+#define YY_DECL yy::parser::symbol_type elna::source::lexer::lex(elna::source::driver& driver)
 #define yyterminate() return yy::parser::make_YYEOF(this->location)
 %}
 
@@ -126,6 +126,6 @@ false                   {
                             std::stringstream ss;
 
                             ss << "Illegal character 0x" << std::hex << static_cast<unsigned int>(yytext[0]);
-                            throw yy::parser::syntax_error(this->location, ss.str());
+                            driver.error(this->location, ss.str());
                         }
 %%