This is not necessarily the current version of this TIP.
| TIP: | 174 |
| Title: | Math Operators as Commands |
| Version: | $Revision: 1.12 $ |
| Authors: |
Kristoffer Lawson <setok at altparty dot org> Donal K. Fellows <donal dot k dot fellows at man dot ac dot uk> David S. Cargo <escargo at skypoint dot com> Peter Spjuth <peter dot spjuth at space dot se> Kevin B. Kenny <kennykb at acm dot org> |
| State: | Draft |
| Type: | Project |
| Tcl-Version: | 8.5 |
| Vote: | Pending |
| Created: | Monday, 15 March 2004 |
This TIP describes a proposal for math operators in Tcl as separate commands, acting much like the equivalent in the Lisp language. This would make simple usage of mathematics much clearer.
While the expr command works fairly well for longer mathematical expressions, it is extremely tedious for the most common uses, such as handling indices. Take the following examples:
set newList [lrange $list [expr {$idx - 5}] [expr {$idx + 5}]]
.c create oval [expr {$x - $r}] [expr {$y - $r}] [expr {$x + $r}] [expr {$y + $r}]
Many find this particular aspect of Tcl unappealing. It gets increasing