From 8840f06053c95573c46455734a48c06a22868c5e Mon Sep 17 00:00:00 2001
From: Jonathan Turner <probata@hotmail.com>
Date: Thu, 20 Aug 2009 14:50:13 +0000
Subject: [PATCH] Allow floating point numbers without a zero before the
 decimal point

---
 include/chaiscript/language/chaiscript_parser.hpp | 4 ++--
 unittests/float.chai                              | 2 ++
 unittests/float.txt                               | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)
 create mode 100644 unittests/float.chai
 create mode 100644 unittests/float.txt

diff --git a/include/chaiscript/language/chaiscript_parser.hpp b/include/chaiscript/language/chaiscript_parser.hpp
index 1609c91..8e66b02 100644
--- a/include/chaiscript/language/chaiscript_parser.hpp
+++ b/include/chaiscript/language/chaiscript_parser.hpp
@@ -140,7 +140,7 @@ namespace chaiscript
          */
         bool Float_() {
             bool retval = false;
-            if ((input_pos != input_end) && (*input_pos >= '0') && (*input_pos <= '9')) {
+            if ((input_pos != input_end) && (((*input_pos >= '0') && (*input_pos <= '9')) || (*input_pos == '.'))) {
                 while ((input_pos != input_end) && (*input_pos >= '0') && (*input_pos <= '9')) {
                     ++input_pos;
                     ++col;
@@ -178,7 +178,7 @@ namespace chaiscript
                 std::string::iterator start = input_pos;
                 int prev_col = col;
                 int prev_line = line;
-                if ((input_pos != input_end) && (*input_pos >= '0') && (*input_pos <= '9')) {
+                if ((input_pos != input_end) && (((*input_pos >= '0') && (*input_pos <= '9')) || (*input_pos == '.')) ) {
                     if (Float_()) {
                         std::string match(start, input_pos);
                         TokenPtr t(new Token(match, Token_Type::Float, filename, prev_line, prev_col, line, col));
diff --git a/unittests/float.chai b/unittests/float.chai
new file mode 100644
index 0000000..f2fa6ea
--- /dev/null
+++ b/unittests/float.chai
@@ -0,0 +1,2 @@
+print(1.2)
+print(.5)
diff --git a/unittests/float.txt b/unittests/float.txt
new file mode 100644
index 0000000..73074be
--- /dev/null
+++ b/unittests/float.txt
@@ -0,0 +1,2 @@
+1.2
+0.5