+bool ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
+{
+ size_t i;
+ const ast_expression_common *fromex;
+ ast_expression_common *selfex;
+ self->expression.vtype = other->expression.vtype;
+ if (other->expression.next) {
+ self->expression.next = (ast_expression*)ast_type_copy(ast_ctx(self), other->expression.next);
+ if (!self->expression.next)
+ return false;
+ }
+ fromex = &other->expression;
+ selfex = &self->expression;
+ for (i = 0; i < fromex->params_count; ++i) {
+ ast_value *v = ast_value_copy(fromex->params[i]);
+ if (!v || !ast_expression_common_params_add(selfex, v))
+ return false;
+ }
+ return true;
+}
+