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Types and values (2)


Current trend: simplification/unification of low-level types:
Perl blurs int/double
Scheme & Ruby blurs int/bigint
Name vs structural equivalence is less a problem when mostly everything is abstract
Records: Cobol (already instanciated)
Lists: Lisp
Pointers: PL/I
User defined: Algol 68
Abstract types: Simula 67