[Attr] Print enum attributes at correct position

For example, given:

  void fn() {
    enum __attribute__((deprecated)) T *p;
  }

-ast-print produced:

  void fn() {
    enum T __attribute__((deprecated(""))) *p;
  }

-ast-print on that produced:

  void fn() {
    enum T *p __attribute__((deprecated("")));
  }

The attribute is on enum T in the first case, but it's on p in the
other cases.

Details:

Within enum declarations, enum attributes were always printed after
the tag and any member list.  When no member list was present but the
enum was a type specifier in a variable declaration, the attribute
then applied to the variable not the enum, changing the semantics.

This patch fixes that by always printing attributes between the enum's
keyword and tag, as clang already does for structs, unions, and
classes.

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D45456

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@330722 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/AST/DeclPrinter.cpp b/lib/AST/DeclPrinter.cpp
index 87cee798659b2ed555960339e04f45606748ef28..b2c5303bb6a515fcb44cec0ec453cd620cfec252 100644 (file)
--- a/lib/AST/DeclPrinter.cpp
+++ b/lib/AST/DeclPrinter.cpp
@@ -496,14 +496,17 @@ void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
 void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
   if (!Policy.SuppressSpecifiers && D->isModulePrivate())
     Out << "__module_private__ ";
-  Out << "enum ";
+  Out << "enum";
   if (D->isScoped()) {
     if (D->isScopedUsingClassTag())
-      Out << "class ";
+      Out << " class";
     else
-      Out << "struct ";
+      Out << " struct";
   }
-  Out << *D;
+
+  prettyPrintAttributes(D);
+
+  Out << ' ' << *D;
 
   if (D->isFixed() && D->getASTContext().getLangOpts().CPlusPlus11)
     Out << " : " << D->getIntegerType().stream(Policy);
@@ -513,7 +516,6 @@ void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
     VisitDeclContext(D);
     Indent() << "}";
   }
-  prettyPrintAttributes(D);
 }
 
 void DeclPrinter::VisitRecordDecl(RecordDecl *D) {

diff --git a/test/Sema/ast-print.c b/test/Sema/ast-print.c
index 83a08bf245836c56eab2099db880c97646ffc2e0..86166dbd99c49f07a9471cb37d92e4da8529a507 100644 (file)
--- a/test/Sema/ast-print.c
+++ b/test/Sema/ast-print.c
@@ -1,5 +1,12 @@
-// RUN: %clang_cc1 %s -ast-print | FileCheck %s
-// RUN: %clang_cc1 %s -ast-print | %clang_cc1 -fsyntax-only -
+// RUN: %clang_cc1 %s -ast-print -verify > %t.c
+// RUN: FileCheck %s --input-file %t.c
+//
+// RUN: echo >> %t.c "// expected""-warning@* {{use of GNU old-style field designator extension}}"
+// RUN: echo >> %t.c "// expected""-warning@* {{'EnumWithAttributes' is deprecated}}"
+// RUN: echo >> %t.c "// expected""-note@* {{'EnumWithAttributes' has been explicitly marked deprecated here}}"
+// RUN: echo >> %t.c "// expected""-warning@* {{'EnumWithAttributes3' is deprecated}}"
+// RUN: echo >> %t.c "// expected""-note@* {{'EnumWithAttributes3' has been explicitly marked deprecated here}}"
+// RUN: %clang_cc1 -fsyntax-only %t.c -verify
 
 typedef void func_typedef();
 func_typedef xxx;
@@ -58,7 +65,7 @@ struct pair_t {
 };
 
 // CHECK: struct pair_t p = {a: 3, .b = 4};
-struct pair_t p = {a: 3, .b = 4};
+struct pair_t p = {a: 3, .b = 4}; // expected-warning {{use of GNU old-style field designator extension}}
 
 void initializers() {
   // CHECK: int *x = ((void *)0), *y = ((void *)0);
@@ -70,11 +77,30 @@ void initializers() {
   } z = {(struct Z){}};
 }
 
-// CHECK-LABEL: enum EnumWithAttributes {
-enum EnumWithAttributes {
+// CHECK-LABEL: enum __attribute__((deprecated(""))) EnumWithAttributes {
+enum EnumWithAttributes { // expected-warning {{'EnumWithAttributes' is deprecated}}
   // CHECK-NEXT: EnumWithAttributesFoo __attribute__((deprecated(""))),
   EnumWithAttributesFoo __attribute__((deprecated)),
   // CHECK-NEXT: EnumWithAttributesBar __attribute__((unavailable(""))) = 50
   EnumWithAttributesBar __attribute__((unavailable)) = 50
-  // CHECK-NEXT: } __attribute__((deprecated("")))
-} __attribute__((deprecated));
+  // CHECK-NEXT: };
+  // CHECK-NEXT: enum EnumWithAttributes *EnumWithAttributesPtr;
+} __attribute__((deprecated)) *EnumWithAttributesPtr; // expected-note {{'EnumWithAttributes' has been explicitly marked deprecated here}}
+
+// FIXME: If enum is forward-declared at file scope, attributes are lost.
+// CHECK-LABEL: enum EnumWithAttributes2 *EnumWithAttributes2Ptr;
+// expected-warning@+2 {{'EnumWithAttributes2' is deprecated}}
+// expected-note@+1 {{'EnumWithAttributes2' has been explicitly marked deprecated here}}
+enum __attribute__((deprecated)) EnumWithAttributes2 *EnumWithAttributes2Ptr;
+
+// CHECK-LABEL: EnumWithAttributes3Fn
+void EnumWithAttributes3Fn() {
+  // CHECK-NEXT: enum __attribute__((deprecated(""))) EnumWithAttributes3 *EnumWithAttributes3Ptr;
+  // expected-warning@+2 {{'EnumWithAttributes3' is deprecated}}
+  // expected-note@+1 {{'EnumWithAttributes3' has been explicitly marked deprecated here}}
+  enum __attribute__((deprecated)) EnumWithAttributes3 *EnumWithAttributes3Ptr;
+  // Printing must not put the attribute after the tag where it would apply to
+  // the variable instead of the type, and then our deprecation warning would
+  // move to this use of the variable.
+  void *p = EnumWithAttributes3Ptr;
+}