Kent, S. and Howse, J.
Value Types in Eiffel.
In: Proceedings of TOOLS Europe'96 (TOOLS 19).
(Full text available)
Identifies a number of problems with Eiffel's expanded types in modelling value types, and proposes a backward compatible syntactic extension, and a modified semantics. The latter is also shown to be (effectively) backward compatible, in the sense that existing programs would run unaffected if compilers implemented the new semantics. The benefits of the approach are discussed, including an elegant approach to rebuilding data structure libraries.
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