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5.1.124 quote
Syntax:
quote ( expression )
Type:
- none
Purpose:
- prevents expressions from evaluation. Used only in connections with write to
ssi links, prevents evaluation of an expression before sending it to an other
SINGULAR process.
Within a quoted expression, the
quote can be "undone" by an
eval (i.e., each eval "undoes" the
effect of exactly one quote).
Example:
| link l="ssi:w example.ssi";
ring r=0,(x,y,z),ds;
ideal i=maxideal(3);
ideal j=x7,x2,z;
option(prot);
// compute i+j before writing, but not std
write (l, quote(std(eval(i+j))));
close(l);
// now read it in again and evaluate:
read(l);
==> [1048575:1]1(12)s2(11)s3(10)--s(7)s(6)-----7-
==> product criterion:4 chain criterion:0
==> _[1]=z
==> _[2]=x2
==> _[3]=xy2
==> _[4]=y3
close(l);
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See
Ssi links;
eval;
write.
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