Objective-C. Assortment of improvements pretty printing

objective-C declarations, including printing of availability
attributes on methods.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219013 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/DeclPrinter.cpp

@@ -954,11 +954,12 @@ void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
 
   if (OMD->isVariadic())
       Out << ", ...";
+
+  prettyPrintAttributes(OMD);
 
   if (OMD->getBody() && !Policy.TerseOutput) {
     Out << ' ';
     OMD->getBody()->printPretty(Out, nullptr, Policy);
-    Out << '\n';
   }
   else if (Policy.PolishForDeclaration)
     Out << ';';
@@ -968,13 +969,15 @@ void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
   std::string I = OID->getNameAsString();
   ObjCInterfaceDecl *SID = OID->getSuperClass();
 
+  bool eolnOut = false;
   if (SID)
     Out << "@implementation " << I << " : " << *SID;
   else
     Out << "@implementation " << I;
 
   if (OID->ivar_size() > 0) {
     Out << "{\n";
+    eolnOut = true;
     Indentation += Policy.Indentation;
     for (const auto *I : OID->ivars()) {
       Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
@@ -983,7 +986,13 @@ void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
     Indentation -= Policy.Indentation;
     Out << "}\n";
   }
+  else if (SID || (OID->decls_begin() != OID->decls_end())) {
+    Out << "\n";
+    eolnOut = true;
+  }
   VisitDeclContext(OID, false);
+  if (!eolnOut)
+    Out << "\n";
   Out << "@end";
 }
 
@@ -1022,14 +1031,14 @@ void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
     Indentation -= Policy.Indentation;
     Out << "}\n";
   }
-  else if (SID) {
+  else if (SID || (OID->decls_begin() != OID->decls_end())) {
     Out << "\n";
     eolnOut = true;
   }
 
   VisitDeclContext(OID, false);
   if (!eolnOut)
-    Out << ' ';
+    Out << "\n";
   Out << "@end";
   // FIXME: implement the rest...
 }

test/Misc/ast-print-objectivec.m

@@ -0,0 +1,41 @@
+// RUN: %clang_cc1 -ast-print %s -o - | FileCheck %s
+
+@interface NSObject @end
+
+@protocol P
+- (void)MethP __attribute__((availability(macosx,introduced=10.1.0,deprecated=10.2)));
+@end
+
+@interface I : NSObject <P>
+- (void)MethI __attribute__((availability(macosx,introduced=10.1.0,deprecated=10.2)));
+@end
+
+@interface I(CAT)
+- (void)MethCAT __attribute__((availability(macosx,introduced=10.1.0,deprecated=10.2)));
+@end
+
+@implementation I
+- (void)MethP __attribute__((availability(macosx,introduced=10.1.0,deprecated=10.2))) {}
+- (void)MethI __attribute__((availability(macosx,introduced=10.1.0,deprecated=10.2))) {}
+@end
+
+// CHECK: @protocol P
+// CHECK: - (void) MethP __attribute__((availability(macosx, introduced=10.1.0, deprecated=10.2)));
+// CHECK: @end
+
+// CHECK: @interface I : NSObject<P> 
+// CHECK: - (void) MethI __attribute__((availability(macosx, introduced=10.1.0, deprecated=10.2)));
+// CHECK: @end
+
+// CHECK: @interface I(CAT)
+// CHECK: - (void) MethCAT __attribute__((availability(macosx, introduced=10.1.0, deprecated=10.2)));
+// CHECK: @end
+
+// CHECK: @implementation I
+// CHECK: - (void) MethP __attribute__((availability(macosx, introduced=10.1.0, deprecated=10.2))) {
+// CHECK: }
+
+// CHECK: - (void) MethI __attribute__((availability(macosx, introduced=10.1.0, deprecated=10.2))) {
+// CHECK: }
+
+// CHECK: @end