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

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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
This commit is contained in:
Xi Ge
2019-04-01 20:15:54 -07:00
parent f85ca6c01a
commit f7406e6c3c
16 changed files with 186 additions and 89 deletions
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1
tools/swift-api-digester/ModuleDiagsConsumer.cpp
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@@ -66,6 +66,7 @@ static StringRef getCategoryName(uint32_t ID) {
return "/* Protocol Conformance Change */";
case LocalDiagID::default_associated_type_removed:
case LocalDiagID::protocol_req_added:
case LocalDiagID::decl_new_witness_table_entry:
return "/* Protocol Requirement Change */";
case LocalDiagID::super_class_removed:
case LocalDiagID::super_class_changed: