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LibIDL+LibWeb: Begin support for async iterator in IDL

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This adds support for async iterators of the form:

    async iterable<value_type>;
    async iterable<value_type>(/* arguments... */);

It does not yet support the value pairs of the form:

    async iterable<key_type, value_type>;
    async iterable<key_type, value_type>(/* arguments... */);

Async iterators have an optional `return` data property. There's not a
particularly good way to know what interfaces implement this property.
So this adds a new extended attribute, DefinesAsyncIteratorReturn, which
interfaces can use to declare their support.
This commit is contained in:
Timothy Flynn 2025-04-12 13:18:02 -04:00 • committed by Tim Flynn
parent 398f1ce2a0
commit c0ead1b01a
Notes: github-actions[bot] 2025-04-14 21:44:24 +00:00
10 changed files with 593 additions and 7 deletions
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12
Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/main.cpp
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@ -139,6 +139,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
String prototype_implementation;
String iterator_prototype_header;
String iterator_prototype_implementation;
String async_iterator_prototype_header;
String async_iterator_prototype_implementation;
String global_mixin_header;
String global_mixin_implementation;
@ -170,6 +172,14 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(write_if_changed(&IDL::generate_iterator_prototype_implementation, iterator_prototype_implementation));
}
if (interface.async_value_iterator_type.has_value()) {
async_iterator_prototype_header = TRY(String::formatted("{}AsyncIteratorPrototype.h", path_prefix));
async_iterator_prototype_implementation = TRY(String::formatted("{}AsyncIteratorPrototype.cpp", path_prefix));
TRY(write_if_changed(&IDL::generate_async_iterator_prototype_header, async_iterator_prototype_header));
TRY(write_if_changed(&IDL::generate_async_iterator_prototype_implementation, async_iterator_prototype_implementation));
}
if (interface.extended_attributes.contains("Global")) {
global_mixin_header = TRY(String::formatted("{}GlobalMixin.h", path_prefix));
global_mixin_implementation = TRY(String::formatted("{}GlobalMixin.cpp", path_prefix));
@ -182,7 +192,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
auto depfile = TRY(Core::File::open_file_or_standard_stream(depfile_path, Core::File::OpenMode::Write));
StringBuilder depfile_builder;
for (StringView s : { constructor_header, constructor_implementation, prototype_header, prototype_implementation, namespace_header, namespace_implementation, iterator_prototype_header, iterator_prototype_implementation, global_mixin_header, global_mixin_implementation }) {
for (StringView s : { constructor_header, constructor_implementation, prototype_header, prototype_implementation, namespace_header, namespace_implementation, iterator_prototype_header, iterator_prototype_implementation, async_iterator_prototype_header, async_iterator_prototype_implementation, global_mixin_header, global_mixin_implementation }) {
if (s.is_empty())
continue;