15-851 Computation and Deduction
Lecture 7: The Elf Programming Language

We introduce Elf, a concrete realization of LF endowed with an operational semantics so it can be used to implement algorithms. We use the examples from Mini-ML in order to illustrate syntax and various features, such as type reconstruction, mode checking, termination checking.

• Reading: elf.pdf, Twelf User's Guide, mini-ml, misc
• Previous lecture: Higher-Level Judgments
• Next lecture: Parametric and Hypothetical Judgments

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Frank Pfenning