What: Assign using equals
 Where: From the contact
 Description: Tcl code to define new unknown command which allows one
        to use = as a simple assignment command.
 Contact: mailto:mtaylor@alias.com (Mike Taylor)

[RS]: This is one of the most frequent wishes for Tcl: to be able to write, in the Fortran/Algol/Pascal/C infix tradition,
 i = $j + 1
as opposed to Tcl's Polish notation (command name always comes first):
 set i [expr {$j + 1}]
A compromise would be to have a ''let'' command whose arguments have the required structure (e.g. [Let's assign with let]) - a most simple implementation could be this:
 proc let {varName "=" args} {
   upvar 1 $varName v
   set v [uplevel 1 [list expr] $args]
 } 
But of course directly using [expr] is still a tad more efficient...

See also [Radical language modification] - [Let unknown know]
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