* KaRL was considering numbers like .75 to be variables. This should …

…be fixed now.

* Added tests for new doubles like .75 to test_basic_reasoning

include/madara/expression/Interpreter.cpp

@@ -6036,9 +6036,11 @@ madara::expression::Interpreter::number_insert (
     continue;
 
   // do we have a float?
-  if (i + j <= input.length () && input[i + j] == '.')
+  if ((i + j <= input.length () && input[i + j] == '.') || input[i] == '.')
   {
-    ++j;
+    if (input[i] != '.')
+      ++j;
+
     for (; i + j <= input.length () && is_number (input[i + j]); ++j)
       continue;
 
@@ -6286,7 +6288,8 @@ ::std::list<madara::expression::Symbol *>& list,
 bool build_argument_list)
 {
   handled = false;
-  if (is_number (input[i]))
+  if (is_number (input[i]) || 
+    (i + 1 < input.size () && input[i] == '.' && is_number (input[i+1])))
   {
     handled = true;
     // leaf node

tests/test_basic_reasoning.cpp

@@ -534,6 +534,12 @@ void test_doubles (madara::knowledge::KnowledgeBase & knowledge)
 
   knowledge.evaluate (".var7 = 2.00800e-003");
   assert (knowledge.get (".var7") == 0.002008);
+
+  knowledge.evaluate ("var1 = .75; var2 = -.75; var3 = 1.2; var4 = 3.0/5");
+  assert (knowledge.get ("var1") == 0.75);
+  assert (knowledge.get ("var2") == -0.75);
+  assert (knowledge.get ("var3") == 1.2);
+  assert (knowledge.get ("var4") == 3.0/5);
 }
 
 void test_strings (madara::knowledge::KnowledgeBase & knowledge)