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[Mangling] Give protocol-conformance-ref an operator.

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Due to some unfortunate refactoring, protocol-conformance-ref is a
nonterminal in the mangling grammar that doesn't have its own
operator:

```
protocol-conformance-ref ::= protocol module?
```

Both "module" and "protocol" can be an "identifier", which introduces
a mangling collision. Address the mangling collision by using the
operator "HP".

Fixes rdar://problem/46735592.
This commit is contained in:
Doug Gregor
2018-12-17 18:11:47 -08:00
parent 3406307252
commit 510b64fcd5
6 changed files with 9 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
docs/ABI/Mangling.rst
View File

@@ -633,7 +633,7 @@ Property behaviors are implemented using private protocol conformances.
::
concrete-protocol-conformance ::= type protocol-conformance-ref any-protocol-conformance-list 'HC'
protocol-conformance-ref ::= protocol module?
protocol-conformance-ref ::= protocol module? 'HP'
any-protocol-conformance ::= concrete-protocol-conformance
any-protocol-conformance ::= dependent-protocol-conformance

2
include/swift/Demangling/Demangler.h
View File

@@ -458,7 +458,7 @@ protected:
NodePointer getDependentGenericParamType(int depth, int index);
NodePointer demangleGenericParamIndex();
NodePointer popProtocolConformance();
NodePointer popProtocolConformanceRef();
NodePointer demangleProtocolConformanceRef();
NodePointer popAnyProtocolConformance();
NodePointer demangleConcreteProtocolConformance();
NodePointer popDependentProtocolConformance();

2
lib/AST/ASTMangler.cpp
View File

@@ -2282,6 +2282,8 @@ void ASTMangler::appendProtocolConformanceRef(
// are global anyway.
if (isRetroactiveConformance(conformance))
appendModule(conformance->getDeclContext()->getParentModule());
appendOperator("HP");
}
/// Retrieve the index of the conformance requirement indicated by the

5
lib/Demangling/Demangler.cpp
View File

@@ -610,6 +610,7 @@ NodePointer Demangler::demangleOperator() {
case 'C': return demangleConcreteProtocolConformance();
case 'D': return demangleDependentProtocolConformanceRoot();
case 'I': return demangleDependentProtocolConformanceInherited();
case 'P': return demangleProtocolConformanceRef();
default:
pushBack();
pushBack();
@@ -1294,7 +1295,7 @@ NodePointer Demangler::popAnyProtocolConformance() {
});
}
NodePointer Demangler::popProtocolConformanceRef() {
NodePointer Demangler::demangleProtocolConformanceRef() {
NodePointer module = popModule();
NodePointer proto = popProtocol();
auto protocolConformanceRef =
@@ -1309,7 +1310,7 @@ NodePointer Demangler::popProtocolConformanceRef() {
NodePointer Demangler::demangleConcreteProtocolConformance() {
NodePointer conditionalConformanceList = popAnyProtocolConformanceList();
NodePointer conformanceRef = popProtocolConformanceRef();
NodePointer conformanceRef = popNode(Node::Kind::ProtocolConformanceRef);
NodePointer type = popNode(Node::Kind::Type);
return createWithChildren(Node::Kind::ConcreteProtocolConformance,
type, conformanceRef, conditionalConformanceList);

1
lib/Demangling/Remangler.cpp
View File

@@ -1659,6 +1659,7 @@ void Remangler::mangleProtocolConformanceRef(Node *node) {
manglePureProtocol(node->getChild(0));
if (node->getNumChildren() > 1)
mangleChildNode(node, 1);
Buffer << "HP";
}
void Remangler::mangleConcreteProtocolConformance(Node *node) {

2
test/Demangle/Inputs/manglings.txt
View File

@@ -301,7 +301,7 @@ _T0So13GenericOptionas8HashableSCsACP9hashValueSivgTW ---> {T:} protocol witness
_T0So11CrappyColorVs16RawRepresentableSCMA ---> reflection metadata associated type descriptor __C.CrappyColor : Swift.RawRepresentable in __C_Synthesized
$S28protocol_conformance_records15NativeValueTypeVAA8RuncibleAAMc ---> protocol conformance descriptor for protocol_conformance_records.NativeValueType : protocol_conformance_records.Runcible in protocol_conformance_records
$SSC9SomeErrorLeVD ---> __C_Synthesized.related decl 'e' for SomeError
$s20mangling_retroactive5test1yyAA2Z2V5InnerVy12RetroactiveB1XV_AG1YVAI0F1A1PAAyHCg_AkL1QAAyHCg0_GF ---> mangling_retroactive.test1(mangling_retroactive.Z2<RetroactiveB.X>.Inner<RetroactiveB.Y>) -> ()
$s20mangling_retroactive5test0yyAA1ZVy12RetroactiveB1XVSiAE1YVAG0D1A1PAAHPyHCg_AiJ1QAAHPyHCg1_GF ---> mangling_retroactive.test0(mangling_retroactive.Z<RetroactiveB.X, Swift.Int, RetroactiveB.Y>) -> ()
_T0LiteralAByxGxd_tcfC ---> _T0LiteralAByxGxd_tcfC
_T0XZ ---> _T0XZ
_TTSf0os___TFVs17_LegacyStringCore15_invariantCheckfT_T_ ---> function signature specialization <Arg[0] = Guaranteed To Owned and Exploded> of Swift._LegacyStringCore._invariantCheck() -> ()