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LibWeb: Allow null for optional, nullable, no default value union types

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For these types, it would previously only accept `undefined` for the
`null` state.

Fixes GET requests in the Turbo library always failing:
9e057f284a/src/http/fetch_request.js (L219-L220)
9e057f284a/src/http/fetch_request.js (L51-L64)

This was found on https://www.fangamer.com/.
This commit is contained in:
Luke Wilde
2025-02-21 13:23:07 +00:00
committed by Andreas Kling
parent 16662ab230
commit 198cec481a
3 changed files with 27 additions and 1 deletions
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3
Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp
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@@ -1586,9 +1586,10 @@ static void generate_to_cpp(SourceGenerator& generator, ParameterType& parameter
)~~~");
} else {
if (!optional_default_value.has_value()) {
union_generator.set("nullish_or_undefined", union_type.is_nullable() ? "nullish" : "undefined");
union_generator.append(R"~~~(
Optional<@union_type@> @cpp_name@;
if (!@js_name@@js_suffix@.is_undefined())
if (!@js_name@@js_suffix@.is_@nullish_or_undefined@())
@cpp_name@ = TRY(@js_name@@js_suffix@_to_variant(@js_name@@js_suffix@));
)~~~");
} else {