From ad80fc51301f7349b04d50db71b13b5791e00dc3 Mon Sep 17 00:00:00 2001
From: Stefano Sanfilippo <a.little.coder@gmail.com>
Date: Sat, 29 Nov 2014 22:37:57 +0100
Subject: [PATCH] Support for floating point literals.

---
 Monicelli.lpp     | 14 ++++++++++----
 examples/float.mc | 12 ++++++++++++
 2 files changed, 22 insertions(+), 4 deletions(-)
 create mode 100644 examples/float.mc

diff --git a/Monicelli.lpp b/Monicelli.lpp
index 1e189c8..f60c81f 100644
--- a/Monicelli.lpp
+++ b/Monicelli.lpp
@@ -22,7 +22,6 @@
 #include "Parser.hpp"
 
 #include <string>
-#include <cstdlib>
 
 static void meta(const char *);
 
@@ -191,9 +190,16 @@ CHAR  [a-zA-Z_]
     return token::ID;
 } 
 
-{DIGIT}+ {
-    lval->intval = strtol(yytext, NULL, 10);
-    return token::NUMBER;
+[-+]?(({DIGIT}*".")?{DIGIT}+|{DIGIT}+".")([eE][-+]?{DIGIT}+)? {
+    std::string value(yytext);
+
+    if (value.find(".") != std::string::npos) {
+        lval->floatval = std::stod(value);
+        return token::FLOAT;
+    } else {
+        lval->intval = std::stol(value);
+        return token::NUMBER;
+    }
 }
 
 <INITIAL,shift>. {
diff --git a/examples/float.mc b/examples/float.mc
new file mode 100644
index 0000000..12389c9
--- /dev/null
+++ b/examples/float.mc
@@ -0,0 +1,12 @@
+# Test all possible numerical forms (integer and float)
+
+Lei ha clacsonato
+
+2.0 a posterdati
+-2.0 a posterdati
+2. a posterdati
+.232 a posterdati
+-2 a posterdati
+-.2233 a posterdati
++2 a posterdati
++2.233e-23 a posterdati