[clang] [clang][analyzer] Add plist macro formatting (PR #156046)

[Balázs Benics via cfe-commits]

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@@ -351,6 +351,11 @@ ANALYZER_OPTION(bool, ShouldDisplayMacroExpansions, "expand-macros",
                 "expanded and included in the plist output.",
                 false)
 
+ANALYZER_OPTION(bool, ShouldFormatMacrosPlist, "format-macros-plist",
+                "Whether the macros being displayed in the plist "
+                "files are clang-formatted .",
+                false)
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steakhal wrote:

I see your problem. I think there is a way.
How about we only check the prefix of the matched lines. (this is what FileCheck does by default for CHECK lines)
So, I think it's fair to assume that a macro in these tests will start without any leading whitespaces, and then the first token the macro would expand to; and after that just not check the rest of the line.

This way we still have something, and that is still stable to the reasonable degree.
WDYT?

https://github.com/llvm/llvm-project/pull/156046