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int sizeof(mixed * val)
int sizeof(string val)
int sizeof(mapping val)
int sizeof(struct xxx val)
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.
If there were any objects destroyed in the game since the mapping was
last checked for destructed keys, the mapping() needs to be checked
for destructed objects in keys first. In that case, the runtime
increases linear with the number of keys in the mapping (O(n)).
Otherwise the runtime is independent of the mappings size (O(1)).
LDMud 3.2.9 added strings to the possible parameters.
LDMud 3.3 added support for structs.
strlen(E), allocate(E), pointerp(E), mappingp(E), m_allocate(E),