The K Framework Distilled

K is a rewrite-based executable semantic framework in which programming languages,  type systems and formal analysis tools can be defined using configurations,  computations and rules. Configurations organize the state in units called cells,  which are labeled and can be nested. Computations carry computational meaning  as special nested list structures sequentializing computational tasks, such as  fragments of program. Computations extend the original language abstract syntax. K (rewrite) rules make it explicit which parts of the term they read-only, write-only, read-write, or do not care about. This makes K suitable for defining truly concurrent  languages even in the presence of sharing. Computations are like any other terms in a  rewriting environment: they can be matched, moved from one place to another, modified, or deleted. This makes K suitable for defining control-intensive features  such as abrupt termination, exceptions or call/cc. This talk will give an overview  of the K framework and discuss its current implementation.

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