Doxygen: Enable autobrief feature and update coding standards.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237417 91177308-0d34-0410-b5e6-96231b3b80d8

docs/CodingStandards.rst

@@ -247,8 +247,8 @@ tree.  The standard header looks like this:
   //===----------------------------------------------------------------------===//
   ///
   /// \file
-  /// \brief This file contains the declaration of the Instruction class, which is
+  /// This file contains the declaration of the Instruction class, which is the
-  /// the base class for all of the VM instructions.
+  /// base class for all of the VM instructions.
   ///
   //===----------------------------------------------------------------------===//
 
@@ -268,10 +268,10 @@ file is released under.  This makes it perfectly clear what terms the source
 code can be distributed under and should not be modified in any way.
 
 The main body is a ``doxygen`` comment (identified by the ``///`` comment
-marker instead of the usual ``//``) describing the purpose of the file.  It
+marker instead of the usual ``//``) describing the purpose of the file.  The
-should have a ``\brief`` command that describes the file in one or two
+first sentence or a passage beginning with ``\brief`` is used as an abstract.
-sentences.  Any additional information should be separated by a blank line.  If
+Any additional information should be separated by a blank line.  If an
-an algorithm is being implemented or something tricky is going on, a reference
+algorithm is being implemented or something tricky is going on, a reference
 to the paper where it is published should be included, as well as any notes or
 *gotchas* in the code to watch out for.
 
@@ -320,10 +320,11 @@ Doxygen Use in Documentation Comments
 Use the ``\file`` command to turn the standard file header into a file-level
 comment.
 
-Include descriptive ``\brief`` paragraphs for all public interfaces (public
+Include descriptive paragraphs for all public interfaces (public classes,
-classes, member and non-member functions).  Explain API use and purpose in
+member and non-member functions).  Don't just restate the information that can
-``\brief`` paragraphs, don't just restate the information that can be inferred
+be inferred from the API name.  The first sentence or a paragraph beginning
-from the API name.  Put detailed discussion into separate paragraphs.
+with ``\brief`` is used as an abstract. Put detailed discussion into separate
+paragraphs.
 
 To refer to parameter names inside a paragraph, use the ``\p name`` command.
 Don't use the ``\arg name`` command since it starts a new paragraph that
@@ -343,8 +344,8 @@ A minimal documentation comment:
 
 .. code-block:: c++
 
-  /// \brief Does foo and bar.
+  /// Sets the xyzzy property to \p Baz.
-  void fooBar(bool Baz);
+  void setXyzzy(bool Baz);
 
 A documentation comment that uses all Doxygen features in a preferred way:
 
@@ -401,10 +402,10 @@ Correct:
 
   // In Something.h:
 
-  /// \brief An abstraction for some complicated thing.
+  /// An abstraction for some complicated thing.
   class Something {
   public:
-    /// \brief Does foo and bar.
+    /// Does foo and bar.
     void fooBar();
   };
 

docs/doxygen.cfg.in

@@ -169,7 +169,7 @@ SHORT_NAMES            = NO
 # description.)
 # The default value is: NO.
 
-JAVADOC_AUTOBRIEF      = NO
+JAVADOC_AUTOBRIEF      = YES
 
 # If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
 # line (until the first dot) of a Qt-style comment as the brief description. If
@@ -177,7 +177,7 @@ JAVADOC_AUTOBRIEF      = NO
 # requiring an explicit \brief command for a brief description.)
 # The default value is: NO.
 
-QT_AUTOBRIEF           = NO
+QT_AUTOBRIEF           = YES
 
 # The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
 # multi-line C++ special comment block (i.e. a block of //! or /// comments) as