[llvm-bugs] [Bug 42150] New: Bad -> formatting if macro is used in trailing return function

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42150

            Bug ID: 42150
           Summary: Bad -> formatting if macro is used in trailing return
                    function
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: reznak at cadwork.cz
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

Hello,

if I use macro instead of "auto", arrow has no space before and after.

Tested here with 6.0.1 version: https://zed0.co.uk/clang-format-configurator/
Tested on Windows with clang-format version 8.0.0 (tags/RELEASE_800/final)

#define fn [[nodiscard]] auto
fn foo() -> Opt<Error> {
    return {};
}

auto bar() -> Opt<Error> {
    return {};
}

Is formatted as:

#define fn [[nodiscard]] auto
fn foo()->Opt<Error> {
    return {};
}

auto bar() -> Opt<Error> {
    return {};
}

Thank you

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