SYNOPSIS
        int sizeof(mixed * val)
        int sizeof(string  val)
        int sizeof(mapping val)
        int sizeof(struct xxx val)

DESCRIPTION
        Returns the number of elements of an array or struct, the number of
        characters in a string, or the number of keys in a mapping.

        As a special case, the number 0 can be passed, and the function
        will return 0.

HISTORY
        LDMud 3.2.9 added strings to the possible parameters.
        LDMud 3.3 added support for structs.

SEE ALSO
        strlen(E), allocate(E), pointerp(E), mappingp(E), m_allocate(E),
        widthof(E)