Pre-parser phase

Hi stefan,

A thing that has never be mention or discuss,

we have a file
we have preprocessing
- perform file inclusion
- and macro substitution
result is sequence of tokens that is translation unit.

Question is,
The Gnu gcc put identifier in symbol table
during that preprocessing stage, right ?

We get them during parsing of the translation unit.
Do you perceive any problems or reasons who will obliged us
to do it that way.

One of them, result of concatenation operator(##) should return
a valid token.
And a valid token could be an identifier that at this point could
be valid or not.

ex
A ## :: should fail
:: ## A should succeed
A ## :: ## B ## :: ## C should succeed
if previous A, B and C identifier have been declared
and fail otherwise

major implication on the parser.

what do you think ?