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Status Not under consideration
Workspace PL/I Compilers
Created by Guest
Created on May 22, 2018

RELATED IDEAS

Simplify left/right

I know you wanted to have all possibilites in left / right, but I think the 2 parameter in the functions should be optional, because no programmer wants to spezify the length of the target. If I have an "=" the left side is the target, the length of the result is clear, if I don't need this length, then ok spezify parameter number 2.

Idea priority Medium
  • Guest
    Reply
    |     Jun 15, 2018

    A built-in function has to be able to define its returned attributes independent of how it is used, and instead based solely on its arguments' values (just as any user function must do). This is especially true when it is used outside of an assignment and "jsut" in an expression, as, for example, in PUT SKIP LIST( left(x) ). What attributes would LEFT(X) return here?

    If you want to assign S to T and pad with something other than a blank, you could use T = S || COPY( '*', n ) where n is big enough. If you to do this more cleanly, we could have a built-in subroutine (not a function), say PLIAssignWithPad, that would take a target, a source and a fill character as its argument, as, for example

    Call PliAssignWithPad( target, source, '*' );

    But that would be a different RFE

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