App: allow starting '_' in an expression identifier

It's a signle line change in the flex source, bug a big change in the generated source.
FreeCAD · Aug 30, 2019 · 278e933 · 278e933
1 parent 5bef136
commit 278e933
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diff --git a/src/App/ExpressionParser.l b/src/App/ExpressionParser.l
@@ -283,4 +283,4 @@ $[A-Za-z]{1,2}{DIGIT}+       COUNTCHARS; yylval.string = yytext; return CELLADDR
                             return FUNC;
                         }
 
-({L}{M}*)({L}{M}*|{N}|_)*   COUNTCHARS; yylval.string = yytext; return IDENTIFIER;
+({L}{M}*|_)({L}{M}*|{N}|_|@)*   COUNTCHARS; yylval.string = yytext; return IDENTIFIER;