[document parsing]: Allow multiple adjacent \return and the like

commands. Render them properly in XML output.
// rdar://14207725

llvm-svn: 184610

4 files changed, 22 insertions, 21 deletions

diff --git a/clang/lib/AST/CommentSema.cpp b/clang/lib/AST/CommentSema.cpp
index 06f23462ef2..12b4876e307 100644
--- a/clang/lib/AST/CommentSema.cpp
+++ b/clang/lib/AST/CommentSema.cpp
@@ -624,11 +624,10 @@ void Sema::checkBlockCommandDuplicate(const BlockCommandComment *Command) {
     }
     PrevCommand = BriefCommand;
   } else if (Info->IsReturnsCommand) {
-    if (!ReturnsCommand) {
+    if (!ReturnsCommand)
       ReturnsCommand = Command;
-      return;
-    }
     PrevCommand = ReturnsCommand;
+    return;
   } else if (Info->IsHeaderfileCommand) {
     if (!HeaderfileCommand) {
       HeaderfileCommand = Command;
diff --git a/clang/test/Index/comment-to-html-xml-conversion.cpp b/clang/test/Index/comment-to-html-xml-conversion.cpp
index c770ca8d30f..590643590ff 100644
--- a/clang/test/Index/comment-to-html-xml-conversion.cpp
+++ b/clang/test/Index/comment-to-html-xml-conversion.cpp
@@ -116,7 +116,8 @@ void comment_to_html_conversion_6();
 /// \return Bbb.
 void comment_to_html_conversion_7();
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_7:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_7</Name><USR>c:@F@comment_to_html_conversion_7#</USR><Declaration>void comment_to_html_conversion_7()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_7:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><dl><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_7</Name><USR>c:@F@comment_to_html_conversion_7#</USR><Declaration>void comment_to_html_conversion_7()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
+
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph
@@ -132,7 +133,7 @@ void comment_to_html_conversion_7();
 /// \returns Bbb.
 void comment_to_html_conversion_8();
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_8:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_8</Name><USR>c:@F@comment_to_html_conversion_8#</USR><Declaration>void comment_to_html_conversion_8()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_8:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><dl><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_8</Name><USR>c:@F@comment_to_html_conversion_8#</USR><Declaration>void comment_to_html_conversion_8()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph
@@ -148,7 +149,7 @@ void comment_to_html_conversion_8();
 /// \result Bbb.
 void comment_to_html_conversion_9();
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_9:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_9</Name><USR>c:@F@comment_to_html_conversion_9#</USR><Declaration>void comment_to_html_conversion_9()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_9:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><dl><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_9</Name><USR>c:@F@comment_to_html_conversion_9#</USR><Declaration>void comment_to_html_conversion_9()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Bbb.</Para></ResultDiscussion></Function>]
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph
@@ -163,7 +164,7 @@ void comment_to_html_conversion_9();
 /// \returns Bbb.
 void comment_to_html_conversion_10();
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_10:{{.*}} FullCommentAsHTML=[<p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p><p class="para-returns"><span class="word-returns">Returns</span>  Aaa. </p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_10</Name><USR>c:@F@comment_to_html_conversion_10#</USR><Declaration>void comment_to_html_conversion_10()</Declaration><ResultDiscussion><Para> Aaa. </Para></ResultDiscussion><Discussion><Para> Bbb.</Para></Discussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_10:{{.*}} FullCommentAsHTML=[<dl><p class="para-returns"><span class="word-returns">Returns</span>  Aaa. </p><p class="para-returns"><span class="word-returns">Returns</span>  Bbb.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_10</Name><USR>c:@F@comment_to_html_conversion_10#</USR><Declaration>void comment_to_html_conversion_10()</Declaration><ResultDiscussion><Para> Aaa. </Para><Para> Bbb.</Para></ResultDiscussion></Function>]
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph IsWhitespace
@@ -183,7 +184,7 @@ void comment_to_html_conversion_10();
 /// \returns Ccc.
 void comment_to_html_conversion_11();
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_11:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p> Bbb.</p><p class="para-returns"><span class="word-returns">Returns</span>  Ccc.</p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_11</Name><USR>c:@F@comment_to_html_conversion_11#</USR><Declaration>void comment_to_html_conversion_11()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Ccc.</Para></ResultDiscussion><Discussion><Para> Bbb.</Para></Discussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_11:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p> Bbb.</p><dl><p class="para-returns"><span class="word-returns">Returns</span>  Ccc.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_11</Name><USR>c:@F@comment_to_html_conversion_11#</USR><Declaration>void comment_to_html_conversion_11()</Declaration><Abstract><Para> Aaa.</Para></Abstract><ResultDiscussion><Para> Ccc.</Para></ResultDiscussion><Discussion><Para> Bbb.</Para></Discussion></Function>]
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph
@@ -387,7 +388,7 @@ void comment_to_html_conversion_21();
 /// \returns Eee.
 void comment_to_html_conversion_22(int x1, int x2);
 
-// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_22:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p> Bbb.</p><dl><dt class="param-name-index-0">x1</dt><dd class="param-descr-index-0"> Ccc. </dd><dt class="param-name-index-1">x2</dt><dd class="param-descr-index-1"> Ddd. </dd></dl><p class="para-returns"><span class="word-returns">Returns</span>  Eee.</p>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_22</Name><USR>c:@F@comment_to_html_conversion_22#I#I#</USR><Declaration>void comment_to_html_conversion_22(int x1, int x2)</Declaration><Abstract><Para> Aaa.</Para></Abstract><Parameters><Parameter><Name>x1</Name><Index>0</Index><Direction isExplicit="0">in</Direction><Discussion><Para> Ccc. </Para></Discussion></Parameter><Parameter><Name>x2</Name><Index>1</Index><Direction isExplicit="0">in</Direction><Discussion><Para> Ddd. </Para></Discussion></Parameter></Parameters><ResultDiscussion><Para> Eee.</Para></ResultDiscussion><Discussion><Para> Bbb.</Para></Discussion></Function>]
+// CHECK: comment-to-html-xml-conversion.cpp:[[@LINE-2]]:6: FunctionDecl=comment_to_html_conversion_22:{{.*}} FullCommentAsHTML=[<p class="para-brief"> Aaa.</p><p> Bbb.</p><dl><dt class="param-name-index-0">x1</dt><dd class="param-descr-index-0"> Ccc. </dd><dt class="param-name-index-1">x2</dt><dd class="param-descr-index-1"> Ddd. </dd></dl><dl><p class="para-returns"><span class="word-returns">Returns</span>  Eee.</p></dl>] FullCommentAsXML=[<Function file="{{[^"]+}}comment-to-html-xml-conversion.cpp" line="[[@LINE-2]]" column="6"><Name>comment_to_html_conversion_22</Name><USR>c:@F@comment_to_html_conversion_22#I#I#</USR><Declaration>void comment_to_html_conversion_22(int x1, int x2)</Declaration><Abstract><Para> Aaa.</Para></Abstract><Parameters><Parameter><Name>x1</Name><Index>0</Index><Direction isExplicit="0">in</Direction><Discussion><Para> Ccc. </Para></Discussion></Parameter><Parameter><Name>x2</Name><Index>1</Index><Direction isExplicit="0">in</Direction><Discussion><Para> Ddd. </Para></Discussion></Parameter></Parameters><ResultDiscussion><Para> Eee.</Para></ResultDiscussion><Discussion><Para> Bbb.</Para></Discussion></Function>]
 // CHECK-NEXT:  CommentAST=[
 // CHECK-NEXT:    (CXComment_FullComment
 // CHECK-NEXT:       (CXComment_Paragraph IsWhitespace
diff --git a/clang/test/Sema/warn-documentation.cpp b/clang/test/Sema/warn-documentation.cpp
index 1306ac991fc..27a13ab97c6 100644
--- a/clang/test/Sema/warn-documentation.cpp
+++ b/clang/test/Sema/warn-documentation.cpp
@@ -136,7 +136,6 @@ int test_duplicate_brief2(int);
 int test_duplicate_brief3(int);
 
 
-// expected-warning@+5 {{duplicated command '\return'}} expected-note@+1 {{previous command '\return' here}}
 /// \return Aaa
 ///
 /// Bbb
@@ -144,7 +143,6 @@ int test_duplicate_brief3(int);
 /// \return Ccc
 int test_duplicate_returns1(int);
 
-// expected-warning@+5 {{duplicated command '\returns'}} expected-note@+1 {{previous command '\returns' here}}
 /// \returns Aaa
 ///
 /// Bbb
@@ -152,7 +150,6 @@ int test_duplicate_returns1(int);
 /// \returns Ccc
 int test_duplicate_returns2(int);
 
-// expected-warning@+5 {{duplicated command '\result'}} expected-note@+1 {{previous command '\result' here}}
 /// \result Aaa
 ///
 /// Bbb
@@ -160,7 +157,6 @@ int test_duplicate_returns2(int);
 /// \result Ccc
 int test_duplicate_returns3(int);
 
-// expected-warning@+5 {{duplicated command '\return'}} expected-note@+1 {{previous command '\returns' (an alias of '\return') here}}
 /// \returns Aaa
 ///
 /// Bbb
diff --git a/clang/tools/libclang/CXComment.cpp b/clang/tools/libclang/CXComment.cpp
index 1c127e1589d..b96ca1c47ff 100644
--- a/clang/tools/libclang/CXComment.cpp
+++ b/clang/tools/libclang/CXComment.cpp
@@ -412,7 +412,7 @@ struct FullCommentParts {
   const BlockContentComment *Brief;
   const BlockContentComment *Headerfile;
   const ParagraphComment *FirstParagraph;
-  const BlockCommandComment *Returns;
+  SmallVector<const BlockCommandComment *, 4> Returns;
   SmallVector<const ParamCommandComment *, 8> Params;
   SmallVector<const TParamCommandComment *, 4> TParams;
   SmallVector<const BlockContentComment *, 8> MiscBlocks;
@@ -420,7 +420,7 @@ struct FullCommentParts {
 
 FullCommentParts::FullCommentParts(const FullComment *C,
                                    const CommandTraits &Traits) :
-    Brief(NULL), Headerfile(NULL), FirstParagraph(NULL), Returns(NULL) {
+    Brief(NULL), Headerfile(NULL), FirstParagraph(NULL) {
   for (Comment::child_iterator I = C->child_begin(), E = C->child_end();
        I != E; ++I) {
     const Comment *Child = *I;
@@ -452,8 +452,8 @@ FullCommentParts::FullCommentParts(const FullComment *C,
         Headerfile = BCC;
         break;
       }
-      if (!Returns && Info->IsReturnsCommand) {
-        Returns = BCC;
+      if (Info->IsReturnsCommand) {
+        Returns.push_back(BCC);
         break;
       }
       MiscBlocks.push_back(BCC);
@@ -786,8 +786,12 @@ void CommentASTToHTMLConverter::visitFullComment(const FullComment *C) {
     Result << "</dl>";
   }
 
-  if (Parts.Returns)
-    visit(Parts.Returns);
+  if (Parts.Returns.size() != 0) {
+    Result << "<dl>";
+    for (unsigned i = 0, e = Parts.Returns.size(); i != e; ++i)
+      visit(Parts.Returns[i]);
+    Result << "</dl>";
+  }
 
   Result.flush();
 }
@@ -1297,9 +1301,10 @@ void CommentASTToXMLConverter::visitFullComment(const FullComment *C) {
     Result << "</Parameters>";
   }
 
-  if (Parts.Returns) {
+  if (Parts.Returns.size() != 0) {
     Result << "<ResultDiscussion>";
-    visit(Parts.Returns);
+    for (unsigned i = 0, e = Parts.Returns.size(); i != e; ++i)
+      visit(Parts.Returns[i]);
     Result << "</ResultDiscussion>";
   }