domaindrivendev/Swashbuckle.AspNetCore
Please annotate SchemaRepository.TryLookupByType
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#3 659 ouverte le 15 nov. 2025
good first issuehelp-wanted
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Description
I was reviewing some code and noticed a hidden bug: null could be returned, but there was no compiler warning. This is because TryLookupByType lacks the [NotNullWhen(true)] annotation, which is used, for example, in IPAddress.TryParse.
It would be helpful if SchemaRepository.TryLookupByType were annotated for nullability, similar to my workaround below:
#nullable enable
public static bool TryLookupByTypeSafe(this SchemaRepository schemaRepository,
Type type, [NotNullWhen(true)] out OpenApiSchemaReference? referenceSchema)
{
bool result = schemaRepository.TryLookupByType(type,
out OpenApiSchemaReference? obliviousReferenceSchema);
referenceSchema = result ? obliviousReferenceSchema : null;
return result;
}
#nullable restore
And then the hidden bug becomes a compiler warning: