allowing underscore and dots as identifier symbols in exprtk

8 years ago · 3f0afe9526
1 changed files with 5 additions and 1 deletions
--- a/resources/3rdparty/exprtk/exprtk.hpp
+++ b/resources/3rdparty/exprtk/exprtk.hpp
@ -97,7 +97,11 @@ namespace exprtk
        inline bool is_letter(const char_t c)
        {
            return (('a' <= c) && (c <= 'z')) ||
-            (('A' <= c) && (c <= 'Z')) ;
+            (('A' <= c) && (c <= 'Z'))
+#ifdef MODIFICATION
+            || ('.' == c) || ('_' == c)
+#endif
+            ;
        }
        
        inline bool is_digit(const char_t c)