Re: Reading the while standard input into a String

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Mon, 06 Jun 2011 21:10:11 +0200, J-P. Rosen wrote:

> Le 06/06/2011 20:53, Dmitry A. Kazakov a �crit :
>> Of course it is possible for Ada, of which syntax requires neither look
>> ahead or roll-back.
>> 
> Strictly speaking, it does need some look ahead for oddities like
> character'(''')

Not really if the scanner is aware of the context. A character literal
(operand) cannot appear in the context of an infix operation and thus need
not to be tried after an identifier. On its part an attribute's apostrophe
cannot appear in the prefix context (e.g. after the bracket, where an
operand or prefix operation is expected). I don't use look-ahead in my
parser.

Ada's grammar is wonderfully simple for a table driven parser. It only
looks awfully complex when written in BNF.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de