Adding location (line and column) to error report.

Monicelli.lpp

@@ -9,6 +9,8 @@ static void meta(const char *);
 
 using namespace monicelli;
 typedef Parser::token token;
+
+#define YY_USER_ACTION location->begin.columns(yyleng);
 %}
 
 %option ecs stack warn c++
@@ -158,7 +160,11 @@ CHAR  [a-zA-Z_]
     return token::CASE_END;
 }
 
-<INITIAL,shift>[ \t\f\v\n\r] {
+<INITIAL,shift>"\n" {
+    location->begin.lines();
+}
+
+<INITIAL,shift>[ \t\f\v\r] {
 }
 
 {CHAR}({DIGIT}|{CHAR})* {

Monicelli.ypp

@@ -380,11 +380,11 @@ simple_expression:
 #include "Scanner.hpp"
 
 void Parser::error(const location_type& loc, const std::string &message) {
-    std::cerr << "At " << loc.begin.line << "," << loc.begin.column;
+    std::cerr << "line " << loc.begin.line << ", col " << loc.begin.column;
     std::cerr << ": " << message << std::endl;
 }
 
 static int yylex(Parser::semantic_type *lval, Parser::location_type *loc, Scanner &scanner) {
-    return scanner.yylex(lval);
+    return scanner.yylex(lval, loc);
 }
 

Scanner.hpp

@@ -11,16 +11,18 @@ namespace monicelli {
 
 class Scanner: public yyFlexLexer {
 public:
-    Scanner(std::istream &in): yyFlexLexer(&in), lval(nullptr) {}
+    Scanner(std::istream &in): yyFlexLexer(&in) {}
 
-    int yylex(Parser::semantic_type *lval) {
+    int yylex(Parser::semantic_type *lval, Parser::location_type *loc) {
         this->lval = lval;
+        location = loc;
         return yylex();
     }
 
 private:
     int yylex();
     Parser::semantic_type *lval;
+    Parser::location_type *location;
 };
 
 } // monicelli