- if (inf == info_flags::symbol)
- return true;
- if (inf == info_flags::polynomial ||
- inf == info_flags::integer_polynomial ||
- inf == info_flags::cinteger_polynomial ||
- inf == info_flags::rational_polynomial ||
- inf == info_flags::crational_polynomial ||
- inf == info_flags::rational_function)
- return true;
- if (inf == info_flags::real)
- return domain==domain::real || domain==domain::positive;
- if (inf == info_flags::nonnegative)
- return domain == domain::positive;
- else
- return inherited::info(inf);
-}
-
-ex symbol::eval(int level) const
-{
- if (level == -max_recursion_level)
- throw(std::runtime_error("max recursion level reached"));
-
- if (asexinfop->is_assigned) {
- setflag(status_flags::evaluated);
- if (level==1)
- return (asexinfop->assigned_expression);
- else
- return (asexinfop->assigned_expression).eval(level);
- } else {
- return this->hold();
+ switch (inf) {
+ case info_flags::symbol:
+ case info_flags::polynomial:
+ case info_flags::integer_polynomial:
+ case info_flags::cinteger_polynomial:
+ case info_flags::rational_polynomial:
+ case info_flags::crational_polynomial:
+ case info_flags::rational_function:
+ case info_flags::expanded:
+ return true;
+ case info_flags::real:
+ return domain == domain::real || domain == domain::positive;
+ case info_flags::positive:
+ case info_flags::nonnegative:
+ return domain == domain::positive;
+ case info_flags::has_indices:
+ return false;