Parse variable declarations

source/lexer.ll

@@ -6,12 +6,12 @@
 #include "parser.hpp"
 
 #undef YY_DECL
-#define YY_DECL yy::parser::symbol_type elna::syntax::FooLexer::lex()
+#define YY_DECL yy::parser::symbol_type elna::source::lexer::lex()
 #define yyterminate() return yy::parser::make_YYEOF(this->location)
 %}
 
 %option c++ noyywrap never-interactive
-%option yyclass="elna::syntax::FooLexer"
+%option yyclass="elna::source::lexer"
 
 %%
 %{
@@ -53,10 +53,10 @@ const                   {
 var                     {
                             return yy::parser::make_VAR(this->location);
                         }
-True                    {
+true                    {
                             return yy::parser::make_BOOLEAN(true, this->location);
                         }
-False                   {
+false                   {
                             return yy::parser::make_BOOLEAN(false, this->location);
                         }
 [A-Za-z_][A-Za-z0-9_]*  {
@@ -125,7 +125,7 @@ False                   {
 .                       {
                             std::stringstream ss;
 
-                            ss << "Illegal character 0x" << std::hex << static_cast<unsigned char>(yytext[0]);
+                            ss << "Illegal character 0x" << std::hex << static_cast<unsigned int>(yytext[0]);
                             throw yy::parser::syntax_error(this->location, ss.str());
                         }
 %%