Merge pull request #241 from galegosimpatico/fix-240

Fix wrong parse of `(def()->string 'foo')()`.

src/formula.cpp

@@ -4453,7 +4453,12 @@ static std::string debugSubexpressionTypes(ConstFormulaPtr & fml)
 
 			if(op == nullptr) {
 				if(i1->type == FFL_TOKEN_TYPE::LPARENS && (i2-1)->type == FFL_TOKEN_TYPE::RPARENS) {
+				//   This `if` will prevent ` ( def ( ) -> int 32993 ) ( ) `
+				// from being incorrectly interpreted as that
+				// ` def ( ) -> int 32993 ) ( ` must be parsed.
+				if (i2 - 2 >= i1 && (i2 - 2)->type != FFL_TOKEN_TYPE::LPARENS) {
 					return parse_expression(formula_str, i1+1,i2-1,symbols, callable_def, can_optimize);
+				}
 				} else if( (i2-1)->type == FFL_TOKEN_TYPE::RSQUARE) { //check if there is [ ] : either a list definition, or a operator 
 					const Token* tok = i2-2;
 					int square_parens = 0;