• Daniel Vogelheim's avatar
    [parser] Introduce 'contextual keyword tokens'. · ae1e8759
    Daniel Vogelheim authored
    Introduce 'contextual keyword' tokens, which are parsed as identifiers but
    in some contexts are treated by the parser like proper keywords. These are
    usually keywords introduced by recent ECMAScript versions, which for reasons
    of backwards compatibility are still permissible as regular identifiers in
    most contexts.
    
    Current usage is to check for Token::IDENTIFIER and then do a string
    compare. With this change the initial scan will scan them as usual, but
    will then record the token as IDENTIFIER plus a secondary token with the
    'contextual' value.
    
    BUG=v8:6902
    
    Change-Id: I6ae390382998cf756a23720bd481cb9c0eb78a72
    Reviewed-on: https://chromium-review.googlesource.com/459479
    Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
    Reviewed-by: 's avatarMarja Hölttä <marja@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#44189}
    ae1e8759
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