TACL Reference Manual

UTILS:TACL Commands and Functions
HP NonStop TACL Reference Manual—429513-018
8-131
PUSH Command
PUSH Command
Use the PUSH command to create a new top level for one or more variables or built-in
variables. The PUSH command is an alias for the #PUSH built-in function.
variable
is a valid variable or a built-in variable name.
Considerations
•
For existing variables that are not built-in variables, PUSH creates an empty top
level of type TEXT.
•
For built-in variables, PUSH creates a new top-level definition, copying the old top
level to the new one (top-level and second-level definitions are now the same).
•
If the variable does not exist, PUSH registers the name of the variable, but does
not allocate space until you use SET VARIABLE or a similar command or built-in
function to actually place data into the variable. As a result, you must perform a
SET VARIABLE or related operation prior to using the variable in an #IF call or
other command or function that tests the value of the variable.
•
The default type for variables is TEXT. To change this type, use the SET
VARIABLE command.
•
Do not try to PUSH the root directory (:). If you try this, TACL returns “*ERROR*
Cannot push or pop the root segment's root.” In addition, to avoid
losing standard functionality from your TACL environment, do not PUSH the
directories supplied as part of a software RVU (such as UTILS).
PUSH variable [ [,] variable ] ...