try
( ''(fpprec:100), [fpprec, 1.123456890123456890123456890b0] );
That is two ' [apostrophe or single-quote).
_____
From: maxima-bounces at math.utexas.edu [mailto:maxima-bounces at math.utexas.edu]
On Behalf Of van Nek
Sent: Saturday, January 12, 2008 9:23 AM
To: Maxima at math.utexas.edu
Subject: Maxima parser and global parameters
(%i1) ( fpprec:100, [fpprec, 1.123456890123456890123456890b0] );
(%o1) [100, 1.123456890123457b0]
(%i2) ( ibase:2, [ibase, 11111111] );
(%o2) [2, 11111111]
This shows me that in a first step the complete expression is read and
parsed and in a second step the expressions are evaluated from left to
right.
Is it generally possible, that expressions like fpprec:100 can have an
influence on the parser inside of the same expression, or can it only have
effect on the next read in expression?
Volker van Nek