[clang] [clang-format] Add BreakBeforeTemplateClose option (PR #118046)

[Owen Pan via cfe-commits]

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@@ -11224,6 +11224,328 @@ TEST_F(FormatTest, WrapsTemplateDeclarationsWithComments) {
       Style);
 }
 
+TEST_F(FormatTest, BreakBeforeTemplateCloser) {
+  FormatStyle Style = getLLVMStyle();
+  // Begin with tests covering the case where there is no constraint on the
+  // column limit.
+  Style.ColumnLimit = 0;
+  // When BreakBeforeTemplateCloser is turned off, the line break that it adds
+  // shall be removed:
+  verifyFormat("template <\n"
+               "    typename Foo,\n"
+               "    typename Bar>\n"
+               "void foo() {}",
+               "template <\n"
+               "    typename Foo,\n"
+               "    typename Bar\n"
+               ">\n"
+               "void foo() {}",
+               Style);
+
+  Style.BreakBeforeTemplateCloser = true;
+  // BreakBeforeTemplateCloser should NOT force template declarations onto
+  // multiple lines.
+  verifyFormat("template <typename Foo>\n"
+               "void foo() {}",
+               Style);
+  verifyFormat("template <typename Foo, typename Bar>\n"
+               "void foo() {}",
+               Style);
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owenca wrote:

You can add them back if you prefer.

https://github.com/llvm/llvm-project/pull/118046