Re: Variable naming

Dario D. wrote:
Hello all,

Is slash (/) allowed in variable names? I'm reading a tutorial on the NS2 simulator, and it appears to be using slashes in class names:


Every character (except the sequence ::) is allowed as a variable name.

set tcp [new Agent/TCP]

I tried to run the following example through tclsh, but as you can see it didn't work out well:

% set test/blah 5
5
% puts $test/blah
can't read "test": no such variable

Bear in mind that, although any character is valid for a variable name, the parsing for $ only looks for a subset of all possible characters (as specified in the Tcl man page, rule 7).

Try this:

% set test/blah 5
5
% puts $test/blah
can't read "test": no such variable
% puts ${test/blah}
5
% puts [set test/blah]
5
% info exists test/blah
1
.

Relevant Pages

  • Re: Variable naming
    ... I'm reading a tutorial on the ... NS2 simulator, and it appears to be using slashes in class names: ... % set test/blah 5 ... % puts $test/blah ...
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  • Re: Variable naming
    ... % set test/blah 5 ... % puts $ ... Dario D. wrote: ... NS2 simulator, and it appears to be using slashes in class names: ...
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  • Re: Variable naming
    ... NS2 simulator, and it appears to be using slashes in class names: ... set tcp ... % set test/blah 5 ...
    (comp.lang.tcl)