Comment parsing: add CommentOptions to allow specifying custom comment block commands

Add an ability to specify custom documentation block comment commands via a new
class CommentOptions.  The intention is that this class will hold future
customizations for comment parsing, including defining documentation comments
with specific numbers of parameters, etc.

CommentOptions instance is a member of LangOptions.

CommentOptions is controlled by a new command-line parameter
-fcomment-block-commands=Foo,Bar,Baz.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175892 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 6dff373fda..da3add3161 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -108,6 +108,14 @@ static bool checkLanguageOptions(const LangOptions &LangOpts,
     return true;
   }
 
+  if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
+      LangOpts.CommentOpts.BlockCommandNames) {
+    if (Diags)
+      Diags->Report(diag::err_pch_langopt_value_mismatch)
+        << "block command names";
+    return true;
+  }
+
   return false;
 }
 
@@ -3671,6 +3679,15 @@ bool ASTReader::ParseLanguageOptions(const RecordData &Record,
   unsigned Length = Record[Idx++];
   LangOpts.CurrentModule.assign(Record.begin() + Idx, 
                                 Record.begin() + Idx + Length);
+
+  Idx += Length;
+
+  // Comment options.
+  for (unsigned N = Record[Idx++]; N; --N) {
+    LangOpts.CommentOpts.BlockCommandNames.push_back(
+      ReadString(Record, Idx));
+  }
+
   return Listener.ReadLanguageOptions(LangOpts, Complain);
 }