Define a primitive data type: Difference between revisions
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=={{header|Tcl}}== |
=={{header|Tcl}}== |
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Tcl |
Tcl does 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. |
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<lang tcl>namespace eval ::myIntType { |
<lang tcl>namespace eval ::myIntType { |
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variable value_cache |
variable value_cache |
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