size_t nops() const override;
ex op(size_t i) const override;
ex map(map_function & f) const override;
- ex evalf(int level = 0) const override;
+ ex evalf() const override;
ex subs(const exmap & m, unsigned options = 0) const override;
void archive(archive_node& n) const override;
void read_archive(const archive_node& n, lst& syms) override;