From c769891b7629f75345588a34810c4879ea31f795 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sat, 25 Jul 2015 17:54:55 -0400
Subject: [PATCH] Lexer: Implemented ::isInteger to help parsing.

---
 src/Lexer.cpp | 22 ++++++++++++++++++++++
 src/Lexer.h   |  1 +
 2 files changed, 23 insertions(+)

diff --git a/src/Lexer.cpp b/src/Lexer.cpp
index 69466465e..3aebd314f 100644
--- a/src/Lexer.cpp
+++ b/src/Lexer.cpp
@@ -603,6 +603,28 @@ bool Lexer::isNumber (std::string& token, Lexer::Type& type)
   return false;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Lexer::Type::number
+//   \d+
+bool Lexer::isInteger (std::string& token, Lexer::Type& type)
+{
+  std::size_t marker = _cursor;
+
+  if (isDigit (_text[marker]))
+  {
+    ++marker;
+    while (isDigit (_text[marker]))
+      utf8_next_char (_text, marker);
+
+    token = _text.substr (_cursor, marker - _cursor);
+    type = Lexer::Type::number;
+    _cursor = marker;
+    return true;
+  }
+
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Lexer::Type::separator
 //   --
diff --git a/src/Lexer.h b/src/Lexer.h
index 5042255c7..3caad292a 100644
--- a/src/Lexer.h
+++ b/src/Lexer.h
@@ -91,6 +91,7 @@ public:
   bool isDuration     (std::string&, Lexer::Type&);
   bool isUUID         (std::string&, Lexer::Type&);
   bool isNumber       (std::string&, Lexer::Type&);
+  bool isInteger      (std::string&, Lexer::Type&);
   bool isHexNumber    (std::string&, Lexer::Type&);
   bool isSeparator    (std::string&, Lexer::Type&);
   bool isURL          (std::string&, Lexer::Type&);