Added SpaceAfterFunctionName option

[Alexander Kornienko]

Added SpaceAfterFunctionName, which is needed for GNU coding style.

Phab is taking a day off, so the patch is just here:

Index: include/clang/Format/Format.h
===================================================================
--- include/clang/Format/Format.h (revision 196295)
+++ include/clang/Format/Format.h (working copy)
@@ -260,6 +260,9 @@
   /// and '('.
   bool SpaceAfterControlStatementKeyword;

+  /// \brief If \c true, spaces will be inserted between function name and
'('.
+  bool SpaceAfterFunctionName;
+
   /// \brief If \c false, spaces will be removed before assignment
operators.
   bool SpaceBeforeAssignmentOperators;

@@ -317,6 +320,7 @@
            SpacesInCStyleCastParentheses ==
R.SpacesInCStyleCastParentheses &&
            SpaceAfterControlStatementKeyword ==
                R.SpaceAfterControlStatementKeyword &&
+           SpaceAfterFunctionName == R.SpaceAfterFunctionName &&
            SpaceBeforeAssignmentOperators ==
R.SpaceBeforeAssignmentOperators &&
            ContinuationIndentWidth == R.ContinuationIndentWidth;
   }
Index: lib/Format/Format.cpp
===================================================================
--- lib/Format/Format.cpp (revision 196295)
+++ lib/Format/Format.cpp (working copy)
@@ -181,6 +181,7 @@
                    Style.SpacesInCStyleCastParentheses);
     IO.mapOptional("SpaceAfterControlStatementKeyword",
                    Style.SpaceAfterControlStatementKeyword);
+    IO.mapOptional("SpaceAfterFunctionName", Style.SpaceAfterFunctionName);
     IO.mapOptional("SpaceBeforeAssignmentOperators",
                    Style.SpaceBeforeAssignmentOperators);
     IO.mapOptional("ContinuationIndentWidth",
Style.ContinuationIndentWidth);
@@ -267,6 +268,7 @@
   LLVMStyle.SpaceInEmptyParentheses = false;
   LLVMStyle.SpacesInCStyleCastParentheses = false;
   LLVMStyle.SpaceAfterControlStatementKeyword = true;
+  LLVMStyle.SpaceAfterFunctionName = false;
   LLVMStyle.SpaceBeforeAssignmentOperators = true;
   LLVMStyle.ContinuationIndentWidth = 4;
   LLVMStyle.SpacesInAngles = false;
@@ -316,6 +318,7 @@
   GoogleStyle.SpaceInEmptyParentheses = false;
   GoogleStyle.SpacesInCStyleCastParentheses = false;
   GoogleStyle.SpaceAfterControlStatementKeyword = true;
+  GoogleStyle.SpaceAfterFunctionName = false;
   GoogleStyle.SpaceBeforeAssignmentOperators = true;
   GoogleStyle.ContinuationIndentWidth = 4;
   GoogleStyle.SpacesInAngles = false;
Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp (revision 196295)
+++ lib/Format/TokenAnnotator.cpp (working copy)
@@ -1295,7 +1295,8 @@
                         tok::semi) ||
            (Style.SpaceAfterControlStatementKeyword &&
             Left.isOneOf(tok::kw_if, tok::kw_for, tok::kw_while,
tok::kw_switch,
-                         tok::kw_catch));
+                         tok::kw_catch)) ||
+           (Style.SpaceAfterFunctionName && Left.is(tok::identifier));
   }
   if (Left.is(tok::at) && Right.Tok.getObjCKeywordID() !=
tok::objc_not_keyword)
     return false;
Index: unittests/Format/FormatTest.cpp
===================================================================
--- unittests/Format/FormatTest.cpp (revision 196295)
+++ unittests/Format/FormatTest.cpp (working copy)
@@ -6637,6 +6637,33 @@
                "}", NoSpace);
 }

+TEST_F(FormatTest, ConfigurableSpaceAfterFunctionName) {
+  FormatStyle Space = getLLVMStyle();
+  Space.SpaceAfterControlStatementKeyword = false;
+  Space.SpaceAfterFunctionName = true;
+
+  verifyFormat("int f ();", Space);
+  verifyFormat("void f (int a, T b) {\n"
+               "  while(true)\n"
+               "    continue;\n"
+               "}",
+               Space);
+  verifyFormat("if(true)\n"
+               "  f ();\n"
+               "else if(true)\n"
+               "  f ();",
+               Space);
+  verifyFormat("do {\n"
+               "  do_something ();\n"
+               "} while(something ());",
+               Space);
+  verifyFormat("switch(x) {\n"
+               "default:\n"
+               "  break;\n"
+               "}",
+               Space);
+}
+
 TEST_F(FormatTest, ConfigurableSpacesInParentheses) {
   FormatStyle Spaces = getLLVMStyle();

@@ -6945,6 +6972,7 @@
   CHECK_PARSE_BOOL(SpaceInEmptyParentheses);
   CHECK_PARSE_BOOL(SpacesInCStyleCastParentheses);
   CHECK_PARSE_BOOL(SpaceAfterControlStatementKeyword);
+  CHECK_PARSE_BOOL(SpaceAfterFunctionName);
   CHECK_PARSE_BOOL(SpaceBeforeAssignmentOperators);

   CHECK_PARSE("AccessModifierOffset: -1234", AccessModifierOffset, -1234);
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