Types in a mixed language system
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As a support for writing software, a comprehensive set of problem oriented languages appears preferable to any so-called universal language, as soon as static checking is sufficient to ensure type correctness of the mixed language program. We lay the basis for a mixed language system where this requirement is fulfilled. The general outline of the system is first sketched. Detailed consideration is then given to our basic constructs for establishing communication between languages, namely “standard” types and “foreign” types. “Abstract” types, such as defined in CLU, are finally shown to be a particular class of “foreign” types.
Index termsForeign types Interfaces Modules Mixed languages Procedures Type checking
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