[Webkit-unassigned] [Bug 62750] New: Change IDL code generator to require all arguments by default

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=62750

           Summary: Change IDL code generator to require all arguments by
                    default
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pilgrim at chromium.org
                CC: fishd at chromium.org, abarth at webkit.org


As per discussion on public-webapps, WebIDL is changing the default behavior to require all function arguments by default and raise an exception when an argument is missing. (This behavior is currently opt-in in WebKit's IDL system, on a function-by-function basis, with the "RequiresAllArguments=Raise" flag.) To order to match WebIDL as closely as possible, this patch adds an interface-level "LegacyDefaultOptionalArguments" flag and sets it on all existing IDL files (500+), then changes the code generator Perl scripts to behave the old way in the presence of the flag.

Future bugs will focus on adjusting individual IDL files and corresponding tests for newer APIs (like IndexedDB) which are moving to adopt the new default raise-on-missing-argument behavior. This patch does nothing beyond defining the new flag and adjusting existing IDL files so they behave the same way they behaved yesterday.

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