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Extend type nullability qualifiers for Objective-C.

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Introduce context-sensitive, non-underscored nullability specifiers
(nonnull, nullable, null_unspecified) for Objective-C method return
types, method parameter types, and properties.

Introduce Objective-C-specific semantics, including computation of the
nullability of the result of a message send, merging of nullability
information from the @interface of a class into its @implementation,
etc .

This is the Objective-C part of rdar://problem/18868820.

llvm-svn: 240154
This commit is contained in:
Douglas Gregor
2015-06-19 18:14:38 +00:00
parent b4866e85e5
commit 813a066f16
30 changed files with 1035 additions and 183 deletions
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3
clang/lib/Serialization/ASTWriterDecl.cpp
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@@ -542,7 +542,7 @@ void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
// FIXME: stable encoding for @required/@optional
Record.push_back(D->getImplementationControl());
// FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
// FIXME: stable encoding for in/out/inout/bycopy/byref/oneway/nullability
Record.push_back(D->getObjCDeclQualifier());
Record.push_back(D->hasRelatedResultType());
Writer.AddTypeRef(D->getReturnType(), Record);
@@ -678,6 +678,7 @@ void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceLocation(D->getAtLoc(), Record);
Writer.AddSourceLocation(D->getLParenLoc(), Record);
Writer.AddTypeRef(D->getType(), Record);
Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
// FIXME: stable encoding
Record.push_back((unsigned)D->getPropertyAttributes());