clang-format: fix prefix for doxygen comments after member

[Typz]

Summary

Doxygen supports putting documentation blocks after member, by adding
an additional < marker in the comment block. This patch makes sure
this marker is used in lines which are introduced by breaking the
comment.

int foo; ///< Some very long comment.

becomes:

int foo; ///< Some very long
         ///< comment.

[krasimir]

Looks good. Thank you!

[Typz]

I don't have commit access, can someone please commit this patch?

[krasimir]

I'll commit this.

cfe/trunk/lib/Format/BreakableToken.cpp

static bool IsBlank(char C) {
   case '\r':
     return true;
   default:
     return false;
   }
 }
 
 static StringRef getLineCommentIndentPrefix(StringRef Comment) {
-  static const char *const KnownPrefixes[] = {"///", "//", "//!"};
+  static const char *const KnownPrefixes[] = {
+      "///<", "//!<", "///", "//", "//!"};
   StringRef LongestPrefix;
   for (StringRef KnownPrefix : KnownPrefixes) {
     if (Comment.startswith(KnownPrefix)) {
       size_t PrefixLength = KnownPrefix.size();
       while (PrefixLength < Comment.size() && Comment[PrefixLength] == ' ')
         ++PrefixLength;
       if (PrefixLength > LongestPrefix.size())
         LongestPrefix = Comment.substr(0, PrefixLength);
for (size_t i = FirstLineIndex, e = Lines.size(); i < e; ++i) {
       if (Lines[i].size() > Prefix[i].size() &&
           isAlphanumeric(Lines[i][Prefix[i].size()])) {
         if (Prefix[i] == "//")
           Prefix[i] = "// ";
         else if (Prefix[i] == "///")
           Prefix[i] = "/// ";
         else if (Prefix[i] == "//!")
           Prefix[i] = "//! ";
+        else if (Prefix[i] == "///<")
+          Prefix[i] = "///< ";
+        else if (Prefix[i] == "//!<")
+          Prefix[i] = "//!< ";
       }
 
       Tokens[i] = LineTok;
       Content[i] = Lines[i].substr(IndentPrefix.size());
       OriginalContentColumn[i] =
           StartColumn +
           encoding::columnWidthWithTabs(OriginalPrefix[i],
                                         StartColumn,

cfe/trunk/unittests/Format/FormatTestComments.cpp

EXPECT_EQ("//! long long long\n"
             format("//! long long long long\n"
                    "//! long\n",
                    getLLVMStyleWithColumns(20)));
   EXPECT_EQ("/* long long long\n"
             " * long long */",
             format("/* long long long long\n"
                    " * long */",
                    getLLVMStyleWithColumns(20)));
+  EXPECT_EQ("///< long long long\n"
+            "///< long long\n",
+            format("///< long long long long\n"
+                   "///< long\n",
+                   getLLVMStyleWithColumns(20)));
+  EXPECT_EQ("//!< long long long\n"
+            "//!< long long\n",
+            format("//!< long long long long\n"
+                   "//!< long\n",
+                   getLLVMStyleWithColumns(20)));
 
   // Don't bring leading whitespace up while reflowing.
   EXPECT_EQ("/*  long long long\n"
             " * long long long\n"
             " */",
             format("/*  long long long long\n"
                    " *  long long\n"
                    " */",