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Miscellaneous functions

Get void vs scalar vs list context of current subroutine call

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  • wantarray

    Returns true if the context of the currently executing subroutine oreval is looking for a list value. Returns false if the context islooking for a scalar. Returns the undefined value if the context islooking for no value (void context).

    1. return unless defined wantarray; # don't bother doing more
    2. my @a = complex_calculation();
    3. return wantarray ? @a : "@a";

    wantarray()'s result is unspecified in the top level of a file,in a BEGIN, UNITCHECK, CHECK, INIT or END block, orin a DESTROY method.

    This function should have been named wantlist() instead.

 
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