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Published in:
2013 | OriginalPaper | Chapter
Constraining Delimited Control with Contracts
Authors : Asumu Takikawa, T. Stephen Strickland, Sam Tobin-Hochstadt
Published in: Programming Languages and Systems
Publisher: Springer Berlin Heidelberg
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Most programming languages provide abstractions for non-local control flow and access to the stack by using continuations, coroutines, or generators. However, their unrestricted use breaks the local reasoning capability of a programmer. Gradual typing exacerbates this problem because typed and untyped code co-exist. We present a contract system capable of protecting code from control flow and stack manipulations by unknown components. We use these contracts to support a gradual type system, and we prove that the resulting system cannot blame typed components for errors.