jinja: correct member access rule (#18905)

This commit is contained in:
Xuan-Son Nguyen
2026-01-18 00:48:55 +01:00
committed by GitHub
parent d1b4757ded
commit f55b033ae6
5 changed files with 37 additions and 2 deletions
+17 -1
View File
@@ -560,6 +560,7 @@ value for_statement::execute_impl(context & ctx) {
for (size_t i = 0; i < filtered_items.size(); i++) {
JJ_DEBUG("For loop iteration %zu/%zu", i + 1, filtered_items.size());
value_object loop_obj = mk_val<value_object>();
loop_obj->has_builtins = false; // loop object has no builtins
loop_obj->insert("index", mk_val<value_int>(i + 1));
loop_obj->insert("index0", mk_val<value_int>(i));
loop_obj->insert("revindex", mk_val<value_int>(filtered_items.size() - i));
@@ -717,6 +718,7 @@ value member_expression::execute_impl(context & ctx) {
value property;
if (this->computed) {
// syntax: obj[expr]
JJ_DEBUG("Member expression, computing property type %s", this->property->type().c_str());
int64_t arr_size = 0;
@@ -745,10 +747,24 @@ value member_expression::execute_impl(context & ctx) {
property = this->property->execute(ctx);
}
} else {
// syntax: obj.prop
if (!is_stmt<identifier>(this->property)) {
throw std::runtime_error("Non-computed member property must be an identifier");
throw std::runtime_error("Static member property must be an identifier");
}
property = mk_val<value_string>(cast_stmt<identifier>(this->property)->val);
std::string prop = property->as_string().str();
JJ_DEBUG("Member expression, object type %s, static property '%s'", object->type().c_str(), prop.c_str());
// behavior of jinja2: obj having prop as a built-in function AND 'prop', as an object key,
// then obj.prop returns the built-in function, not the property value.
// while obj['prop'] returns the property value.
// example: {"obj": {"items": 123}} -> obj.items is the built-in function, obj['items'] is 123
value val = try_builtin_func(ctx, prop, object, true);
if (!is_val<value_undefined>(val)) {
return val;
}
// else, fallthrough to normal property access below
}
JJ_DEBUG("Member expression on object type %s, property type %s", object->type().c_str(), property->type().c_str());