Cleanups.

1. move emit() to separate file.
2. move main to .cpp
3. use "namespace" for parser and lexer.
4. remove Type.h

Monicelli.ll

@@ -4,8 +4,9 @@
 #include <stdio.h>
 
 extern int lineNumber;
-extern void yyerror(const char *);
-extern void meta(const char *);
+
+void monicelli_error(const char *);
+void monicelli_meta(const char *); // Extern void serve?
 %}
 
 %option noyywrap
@@ -22,7 +23,7 @@ CHAR  [a-zA-Z_]
 }
 
 "#"[^\n]* {
-    meta(yytext + 1);
+    monicelli_meta(yytext + 1);
 }
 
 "bituma"[^\n]* {}
@@ -34,23 +35,23 @@ CHAR  [a-zA-Z_]
     return RETURN;
 }
 "Necchi" {
-    yylval.typeval = TYPENAME_INT;
+    monicelli_lval.typeval = TYPENAME_INT;
     return TYPENAME;
 }
 "Mascetti" {
-    yylval.typeval = TYPENAME_CHAR;
+    monicelli_lval.typeval = TYPENAME_CHAR;
     return TYPENAME;
 }
 "Perozzi" {
-    yylval.typeval = TYPENAME_FLOAT;
+    monicelli_lval.typeval = TYPENAME_FLOAT;
     return TYPENAME;
 }
 "Melandri" {
-    yylval.typeval = TYPENAME_BOOL;
+    monicelli_lval.typeval = TYPENAME_BOOL;
     return TYPENAME;
 }
 "Sassaroli" {
-    yylval.typeval = TYPENAME_DOUBLE;
+    monicelli_lval.typeval = TYPENAME_DOUBLE;
     return TYPENAME;
 }
 "conte" {
@@ -159,17 +160,17 @@ CHAR  [a-zA-Z_]
 <INITIAL,shift>[ \t\f\v] {}
 
 {CHAR}({DIGIT}|{CHAR})* {
-    yylval.strval = strdup(yytext);
+    monicelli_lval.strval = strdup(yytext);
     return ID;
 } 
 
 {DIGIT}+ {
-    yylval.intval = strtol(yytext, NULL, 10);
+    monicelli_lval.intval = strtol(yytext, NULL, 10);
     return NUMBER;
 }
 
 <INITIAL,shift>. {
-    yyerror("Unexpected token");
+    monicelli_error("Unexpected token");
     return -1;
 };
 

Monicelli.y

@@ -16,6 +16,7 @@ extern int yylex();
     double floatval;
     char *strval;   
 }
+%define api.prefix {monicelli_}
 
 %token MAIN
 %token RETURN

Type.h

@@ -1,13 +0,0 @@
-#ifndef TYPE_H
-#define TYPE_H
-
-typedef enum {
-    TYPENAME_INT,
-    TYPENAME_CHAR,
-    TYPENAME_FLOAT,
-    TYPENAME_BOOL,
-    TYPENAME_DOUBLE
-} Type;
-
-#endif
-

emit.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#define _(...) emit(__VA_ARGS__, NULL);
+
+void emit(const char *text, ...) {
+    va_list args;
+    va_start(args, text);
+
+    const char *t;
+    for (t = text; t != NULL; t = va_arg(args, const char *)) {
+        printf("%s", t);
+    }
+
+    va_end(args);
+}
+

main.c

@@ -1,41 +0,0 @@
-#include "Monicelli.tab.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-
-int lineNumber = 1;
-
-void yyerror(const char *message) {
-    fprintf(stderr, "At line %d: %s\n", lineNumber, message);
-    exit(1);
-}
-
-#define _(...) emit(__VA_ARGS__, NULL);
-
-void emit(const char *text, ...) {
-    va_list args;
-    va_start(args, text);
-
-    const char *t;
-    for (t = text; t != NULL; t = va_arg(args, const char *)) {
-        printf("%s", t);
-    }
-
-    va_end(args);
-}
-
-void meta(const char *text) {
-    while (text != '\0' && *text == ' ') {
-        text += 1;
-    }
-    fprintf(stderr, "META: %s\n", text);
-}
-
-int main() {
-#if YYDEBUG
-    yydebug = 1;
-#endif
-    return yyparse();
-}
-

main.cpp

@@ -0,0 +1,36 @@
+#include "Monicelli.tab.h"
+
+#include <iostream>
+#include <cstdlib>
+
+using namespace monicelli;
+
+int lineNumber = 1;
+Program *program;
+
+
+void monicelli_error(const char *message) {
+    std::cerr << "At line " << lineNumber << ": " << message << std::endl;
+    std::exit(1);
+}
+
+void monicelli_meta(const char *text) {
+    while (text != '\0' && *text == ' ') {
+        text += 1;
+    }
+    std::cerr << "META: " << text << std::endl;
+}
+
+int main() {
+#if YYDEBUG
+    yydebug = 1;
+#endif
+
+    program = new Program();
+    monicelli_parse();
+
+    program->emit(std::cout);
+
+    return 0;
+}
+