ex& sub_val::let_op(size_t i){ GINAC_ASSERT(i<nops()); ensure_if_modifiable(); if(i) return val; else return name; }
/** Return modifyable operand/member at position i. */ ex & basic::let_op(size_t i) { ensure_if_modifiable(); throw(std::range_error(std::string("basic::let_op(): ") + class_name() + std::string(" has no operands"))); }