Define a primitive data type: Difference between revisions

Tcl allowsdoes not attach types to values or variables, but it does allow the programmer to create traces, on variables that can be used to enforce type-like constraints among other things. Traces are procedures that execute when variables are read/, written and/or unset. (Traces are also available for commands and for the execution of a script.) Tcl's compiler does not enforce these constraints; they're strictly runtime entities.