From 76b91c3431115a88d013c47839d7c5189da08b28 Mon Sep 17 00:00:00 2001
From: Dmitri Gribenko <gribozavr@gmail.com>
Date: Sun, 18 Nov 2012 00:30:31 +0000
Subject: [PATCH] Documentation parsing: propely handle a lone '\endverbatim'
 and emit a warning.

We actually used to assert on this.

Thanks to NAKAMURA Takumi for noticing this!

llvm-svn: 168277
---
 clang/include/clang/Basic/DiagnosticCommentKinds.td |  6 ++++++
 clang/lib/AST/CommentParser.cpp                     |  8 ++++++++
 clang/test/Sema/warn-documentation.cpp              | 18 ++++++++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/clang/include/clang/Basic/DiagnosticCommentKinds.td b/clang/include/clang/Basic/DiagnosticCommentKinds.td
index 7203ac7..e6dfe5b 100644
--- a/clang/include/clang/Basic/DiagnosticCommentKinds.td
+++ b/clang/include/clang/Basic/DiagnosticCommentKinds.td
@@ -131,5 +131,11 @@ def warn_doc_deprecated_not_sync : Warning<
 def note_add_deprecation_attr : Note<
   "add a deprecation attribute to the declaration to silence this warning">;
 
+// verbatim block commands
+
+def warn_verbatim_block_end_without_start : Warning<
+  "'\\%0' command does not terminate a verbatim text block">,
+  InGroup<Documentation>, DefaultIgnore;
+
 } // end of documentation issue category
 } // end of AST component
diff --git a/clang/lib/AST/CommentParser.cpp b/clang/lib/AST/CommentParser.cpp
index d053dc0..d0a8474 100644
--- a/clang/lib/AST/CommentParser.cpp
+++ b/clang/lib/AST/CommentParser.cpp
@@ -554,6 +554,14 @@ BlockContentComment *Parser::parseParagraphOrBlockCommand() {
           return parseBlockCommand();
         break; // Block command ahead, finish this parapgaph.
       }
+      if (Info->IsVerbatimBlockEndCommand) {
+        Diag(Tok.getLocation(),
+             diag::warn_verbatim_block_end_without_start)
+          << Info->Name
+          << SourceRange(Tok.getLocation(), Tok.getEndLocation());
+        consumeToken();
+        continue;
+      }
       if (Info->IsUnknownCommand) {
         Content.push_back(S.actOnUnknownCommand(Tok.getLocation(),
                                                 Tok.getEndLocation(),
diff --git a/clang/test/Sema/warn-documentation.cpp b/clang/test/Sema/warn-documentation.cpp
index b5d3300..3eca3c8 100644
--- a/clang/test/Sema/warn-documentation.cpp
+++ b/clang/test/Sema/warn-documentation.cpp
@@ -502,6 +502,24 @@ enum test_returns_wrong_decl_8 {
 namespace test_returns_wrong_decl_10 { };
 
 
+// expected-warning@+1 {{'\endverbatim' command does not terminate a verbatim text block}}
+/// \endverbatim
+int test_verbatim_1();
+
+// expected-warning@+1 {{'\endcode' command does not terminate a verbatim text block}}
+/// \endcode
+int test_verbatim_2();
+
+// FIXME: we give a bad diagnostic here because we throw away non-documentation
+// comments early.
+//
+// expected-warning@+2 {{'\endcode' command does not terminate a verbatim text block}}
+/// \code
+//  foo
+/// \endcode
+int test_verbatim_3();
+
+
 // expected-warning@+1 {{empty paragraph passed to '\brief' command}}
 int test1; ///< \brief\author Aaa
 
-- 
2.7.4