[cxx-reflection] PATCH to decltype: Go through semantics analysis

[Nathan Sidwell]

Gabriel Dos Reis wrote:
> Nathan Sidwell <nathan@codesourcery.com> writes:

> | I suggest an extensible scheme
> | X <digit1> <digit2> <sourcename> <type>...[n1] <expr>...[n2]
>                       ^^^^^^^^^^^^
> 
> what is this for?
same as vendor operators
	  ::= v <digit> <source-name>	# vendor extended operator

Vendors who define builtin extended operators (e.g. __alignof) shall encode
them as a 'v' prefix followed by the operand count as a single decimal digit,
and the name in <length,ID> form.

nathan

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          The voices in my head said this was stupid too
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