-num_exp(exp) ::= num_exp(exp_) num_exp_op_token(operator_) num_exp(operand_). {
- exp_->op = operator_->type;
- exp_->operand = operand_;
- exp = exp_;
- free(operator_);
+num_exp(exp) ::= number(num). {
+ exp = psi_num_exp_init_num(num);
+ exp->token = psi_token_copy(num->token);
+}
+num_exp(exp) ::= LPAREN(L) num_exp(exp_) RPAREN. {
+ exp = psi_num_exp_init_unary(PSI_T_LPAREN, exp_);
+ exp->token = L;
+}
+num_exp(exp) ::= num_exp(lhs_) num_exp_binary_op_token(OP) num_exp(rhs_). {
+ exp = psi_num_exp_init_binary(OP->type, lhs_, rhs_);
+ exp->token = OP;
+}
+num_exp(exp) ::= num_exp_unary_op_token(OP) num_exp(exp_). {
+ exp = psi_num_exp_init_unary(OP->type, exp_);
+ exp->token = OP;