Game semantics for call-by-value polymorphism

  • Authors:
  • James Laird

  • Affiliations:
  • Department of Computer Science, University of Bath, UK

  • Venue:
  • ICALP'10 Proceedings of the 37th international colloquium conference on Automata, languages and programming: Part II
  • Year:
  • 2010

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Abstract

A game semantic approach to interpreting call-by-value polymorphism is described, based on extending Hyland-Ong games (which have already proved a rich source of models for higher-order programming languages with computational effects) with explicit "copycat links". This captures universal quantification in a simple and concrete way; it is effectively presentable, and opens the possibility of extending existing model checking techniques to polymorphic types. In particular, we present a fully abstract semantics for a call-by-value language with general references and full higher-rank polymorphism, within which polymorphic objects, for example, may be represented. We prove full abstraction by showing that every universally quantified type is a definable retract of its instantiation with the type of natural numbers.