[clang] [clang-format] Change BinPackParameters to an enum to add a BreakAlways (PR #101882)

[Owen Pan via cfe-commits]

================
@@ -8925,6 +8925,97 @@ TEST_F(FormatTest, FormatsOneParameterPerLineIfNecessary) {
       NoBinPacking);
 }
 
+TEST_F(FormatTest, FormatsDeclarationBreakAlways) {
+  FormatStyle BreakAlways = getGoogleStyle();
+  BreakAlways.BinPackParameters = FormatStyle::BPPS_OnePerLine;
+  verifyFormat("void f(int a,\n"
+               "       int b);",
+               BreakAlways);
+  verifyFormat("void f(int aaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
+               "       int bbbbbbbbbbbbbbbbbbbbbbbbb,\n"
+               "       int cccccccccccccccccccccccc);",
+               BreakAlways);
+
+  // Ensure AlignAFterOpenBracket interacts correctly with
+  // PackParameters set to BreakAlways.
+  BreakAlways.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
+  verifyFormat(
+      "void someLongFunctionName(\n"
+      "    int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
+      "    int b);",
+      BreakAlways);
+  BreakAlways.AlignAfterOpenBracket = FormatStyle::BAS_BlockIndent;
+  verifyFormat(
+      "void someLongFunctionName(\n"
+      "    int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
+      "    int b\n"
+      ");",
+      BreakAlways);
+}
+
+TEST_F(FormatTest, FormatsDefinitionBreakAlways) {
+  FormatStyle BreakAlways = getGoogleStyle();
+  BreakAlways.BinPackParameters = FormatStyle::BPPS_OnePerLine;
----------------
owenca wrote:

```suggestion
  BreakAlways.BinPackParameters = FormatStyle::BPPS_Never;
```

https://github.com/llvm/llvm-project/pull/101882