Lexer: Implemented ::isInteger to help parsing.

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
 //   --

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&);