[Webkit-unassigned] [Bug 247226] New: [MSVC] constexpr-if statement in ArgumentCoders.h causes compilation errors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247226

            Bug ID: 247226
           Summary: [MSVC] constexpr-if statement in ArgumentCoders.h
                    causes compilation errors
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zan at falconsigh.net
                CC: dkolesa at igalia.com

After 255496 at main a compilation issue was reported on MSVC++:

> something.cpp(whatever-line-is-end-of-file): fatal error C1024: unexpected end-of-file found

Daniel narrowed this down to the listed change, and also narrowed down the problem to the constexpr-if introduced in the patch:

> if constexpr (Index < sizeof...(Elements)) { ...

What reportedly does work as intended is moving the calculation of the condition into a separate constexpr variable:

>  constexpr bool Recurse = (Index < sizeof...(Elements));

:shrug:

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