swift

f7406e6c - swift-api-digester: diagnose changing of the necessity of new witness table entry as ABI breakage

swift-api-digester: diagnose changing of the necessity of new witness table entry as ABI breakage Protocol requirements may not necessarily add new entries to the witness table if it's inherited from super protocol. This patch teaches the json dump to include a flag indicating whether a protocol requirement requires new witness table entry and diagnoses the change of such flag as ABI breakages. rdar://47657204