Harlan 70089a7bcc [Syntax] Represent TokenSyntax as a Syntax node (#10606) ...

Previously, users of TokenSyntax would always deal with RC<TokenSyntax>
which is a subclass of RawSyntax. Instead, provide TokenSyntax as a
fully-realized Syntax node, that will always exist as a leaf in the
Syntax tree.

This hides the implementation detail of RawSyntax and SyntaxData
completely from clients of libSyntax, and paves the way for future
generation of Syntax nodes.

2017-06-27 11:08:10 -07:00

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