[clang] [clang-format] Add BreakFunctionDeclarationParameters option (PR #158745)

[via cfe-commits]

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@@ -8143,6 +8143,39 @@ TEST_F(FormatTest, BreakFunctionDefinitionParameters) {
                Input, Style);
 }
 
+TEST_F(FormatTest, BreakFunctionDeclarationParameters) {
+  StringRef Input = "void functionDecl(paramA, paramB, paramC);\n"
+                    "void emptyFunctionDefinition() {}\n"
+                    "void functionDefinition(int A, int B, int C) {}\n"
+                    "Class::Class(int A, int B) : m_A(A), m_B(B) {}";
+  verifyFormat(Input);
+
+  FormatStyle Style = getLLVMStyle();
+  EXPECT_FALSE(Style.BreakFunctionDeclarationParameters);
+  Style.BreakFunctionDeclarationParameters = true;
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mydeveloperday wrote:

your documentation suggest that having this as false, doesn't break, but actually almost looks like it "joins" the lines, but looking at the code I can't see that is the case,

 does false really mean "Leave" or "join"...could you add a test if you mean Join but also move it to an enum so we can have a "Leave" case..

How does this interact with other options? doing similar things..

https://github.com/llvm/llvm-project/pull/158745