Arguments of nap Command

If the nap command has multiple arguments then these are concatenated. Thus it is not always necessary to enclose the expression by quote (") characters, but this practice is recommended because it

• prevents Tcl from removing braces ({})
• allows standard Tcl ($[]) substitution within braces
• allows multi-line expressions.

For example, the following works without quotes:

% [nap 2 * 3]
6

But the following fails without quotes:

% [nap {3 5} * 2]
3 5 * 2
  ^
syntax error, unexpected UNUMBER, expecting $end
Error at line 1768 of file napParse.tab.c
% [nap "{3 5} * 2"]
6 10

Multi-line expressions are convenient for matrices, as in:

% [nap "transpose{
{1 2}
{3 4}
}"]
1 3
2 4

Author: Harvey Davies       © 2002-2004, CSIRO Australia.       Legal Notice and Disclaimer CVS Version Details: $Id: nap_args.html,v 1.1 2004/11/04 01:31:37 dav480 Exp $