[clang-format] C++11 braced lists should respect the SpacesInParentheses setting

Summary:
According to the clang-format documentation, "Fundamentally, C++11 braced lists are formatted exactly like function calls would be formatted in their place. If the braced list follows a name (e.g. a type or variable name), clang-format formats as if the `{}` were the parentheses of a function call with that name."

This patch furthers the treatment of C++11 braced list braces as parentheses by respecting the `SpacesInParentheses` setting.

Reviewers: MyDeveloperDay, reuk, owenpan

Reviewed By: MyDeveloperDay

Subscribers: cfe-commits

Tags: #clang-format, #clang

Patch By: mitchell-stellar

Differential Revision: https://reviews.llvm.org/D68415

llvm-svn: 373751

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 0c41723..a1073c8 100644 (file)
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -2196,7 +2196,8 @@ void TokenAnnotator::calculateFormattingInformation(AnnotatedLine &Line) {
     if (Current->is(TT_LineComment)) {
       if (Current->Previous->BlockKind == BK_BracedInit &&
           Current->Previous->opensScope())
-        Current->SpacesRequiredBefore = Style.Cpp11BracedListStyle ? 0 : 1;
+        Current->SpacesRequiredBefore =
+            (Style.Cpp11BracedListStyle && !Style.SpacesInParentheses) ? 0 : 1;
       else
         Current->SpacesRequiredBefore = Style.SpacesBeforeTrailingComments;
 
@@ -2520,7 +2521,9 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
     return Left.is(tok::hash);
   if (Left.isOneOf(tok::hashhash, tok::hash))
     return Right.is(tok::hash);
-  if (Left.is(tok::l_paren) && Right.is(tok::r_paren))
+  if ((Left.is(tok::l_paren) && Right.is(tok::r_paren)) ||
+      (Left.is(tok::l_brace) && Left.BlockKind != BK_Block &&
+       Right.is(tok::r_brace) && Right.BlockKind != BK_Block))
     return Style.SpaceInEmptyParentheses;
   if (Left.is(tok::l_paren) || Right.is(tok::r_paren))
     return (Right.is(TT_CastRParen) ||
@@ -2636,7 +2639,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
   if ((Left.is(tok::l_brace) && Left.BlockKind != BK_Block) ||
       (Right.is(tok::r_brace) && Right.MatchingParen &&
        Right.MatchingParen->BlockKind != BK_Block))
-    return !Style.Cpp11BracedListStyle;
+    return Style.Cpp11BracedListStyle ? Style.SpacesInParentheses : true;
   if (Left.is(TT_BlockComment))
     // No whitespace in x(/*foo=*/1), except for JavaScript.
     return Style.Language == FormatStyle::LK_JavaScript ||

diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 14ac6f9..d31ec30 100644 (file)
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -8214,6 +8214,34 @@ TEST_F(FormatTest, LayoutCxx11BraceInitializers) {
   SpaceBeforeBrace.SpaceBeforeCpp11BracedList = true;
   verifyFormat("vector<int> x {1, 2, 3, 4};", SpaceBeforeBrace);
   verifyFormat("f({}, {{}, {}}, MyMap[{k, v}]);", SpaceBeforeBrace);
+
+  FormatStyle SpaceBetweenBraces = getLLVMStyle();
+  SpaceBetweenBraces.SpacesInAngles = true;
+  SpaceBetweenBraces.SpacesInParentheses = true;
+  SpaceBetweenBraces.SpacesInSquareBrackets = true;
+  verifyFormat("vector< int > x{ 1, 2, 3, 4 };", SpaceBetweenBraces);
+  verifyFormat("f( {}, { {}, {} }, MyMap[ { k, v } ] );", SpaceBetweenBraces);
+  verifyFormat("vector< int > x{ // comment 1\n"
+               "                 1, 2, 3, 4 };",
+               SpaceBetweenBraces);
+  SpaceBetweenBraces.ColumnLimit = 20;
+  EXPECT_EQ("vector< int > x{\n"
+            "    1, 2, 3, 4 };",
+            format("vector<int>x{1,2,3,4};", SpaceBetweenBraces));
+  SpaceBetweenBraces.ColumnLimit = 24;
+  EXPECT_EQ("vector< int > x{ 1, 2,\n"
+            "                 3, 4 };",
+            format("vector<int>x{1,2,3,4};", SpaceBetweenBraces));
+  EXPECT_EQ("vector< int > x{\n"
+            "    1,\n"
+            "    2,\n"
+            "    3,\n"
+            "    4,\n"
+            "};",
+            format("vector<int>x{1,2,3,4,};", SpaceBetweenBraces));
+  verifyFormat("vector< int > x{};", SpaceBetweenBraces);
+  SpaceBetweenBraces.SpaceInEmptyParentheses = true;
+  verifyFormat("vector< int > x{ };", SpaceBetweenBraces);
 }
 
 TEST_F(FormatTest, FormatsBracedListsInColumnLayout) {