[fpc-devel] Some compiler changes...

[Thorsten Engler]

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> So instead you'd put a & ?
> 
> Hardly more readable, I'd say. On the contrary. _ is used 
> already, & is not.

And that's exactly the reason for using & and not _. It's not part of a
valid identifier. 

If you look at:

&class

You see directly it's the escaped identifier "class". The & doesn't
naturally read as part of the identifier.

If you look at:

_class

You read it as the identifier "_class". _ is a valid part of an identifier
and people reading source are used to parsing it that way. In addition,
starting identifiers with an _ is very common to say "that's private, keep
you fingers off". E.g. I see often enough in the compiler source currently
that there is a public property and the private variable has the same name
prefixed by _. If you are overloading the meaning of identifiers starting
with an underscore with both "that's private" and "bummer, we had a keyword
conflict". Then you are causing confusion.

Cheers,
Thorsten
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