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HELP COPYDATA Roger Evans, Aug 1985 copydata(struct1) -> struct2 copydata copies its argument, and recursively copies its components (unlike copy which only copies the top level of a data structure). Thus it returns a structure which is similar to its argument, but completely separate from it. Only vectors, records, arrays, properties, and Prolog variables are copied; other items are returned unchanged. There is a check for one-level circularity (an object being an element of itself) but not for general circularity. There is no check for a list being a member of itself, apart from being the head or the tail. When circularity is detected a mishap results (except in the case of a prologvar, which is replaced by a new one). See also LIB * COPYDATA, HELP * COPY, and HELP * COPYLIST. --- C.all/help/copydata --- Copyright University of Sussex 1995. All rights reserved.