Don't simply give up when exceeding 80cols, choose an "ok" option.

This addresses llvm.org/PR14847.

We can now format something like:
int aaaaaaaaaaaaaaaaaaaaaaaaaaa =
    // aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaiaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;

clang-format unavoidably exceeds the column limit, but does not just
flush everything into a single line. Moreover, it tries to minimize the
number of characters beyond the column limit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171964 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 56d4e17468..495fc7fee1 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -1026,6 +1026,15 @@ TEST_F(FormatTest, HandlesIncludeDirectives) {
 // Error recovery tests.
 //===----------------------------------------------------------------------===//
 
+TEST_F(FormatTest, IndentationWithinColumnLimitNotPossible) {
+  verifyFormat("int aaaaaaaa =\n"
+               "    // Overly long comment\n"
+               "    b;", getLLVMStyleWithColumns(20));
+  verifyFormat("function(\n"
+               "    ShortArgument,\n"
+               "    LoooooooooooongArgument);\n", getLLVMStyleWithColumns(20));
+}
+
 TEST_F(FormatTest, IncorrectAccessSpecifier) {
   verifyFormat("public:");
   verifyFormat("class A {\n"