Type preservation - PowerPoint PPT Presentation

A type-checking algorithm

A type-checking algorithm. The task: (since we start with empty H, why is the goal not just E?) The rule set (revisited next page) is algorithmic: The rules are syntax-directed For each expression, a unique potentially applicable rule For goals in body of a proper rule:

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627 views • 36 slides

CSE-321 Programming Languages Simply Typed  -Calculus

CSE-321 Programming Languages Simply Typed  -Calculus. 박성우. POSTECH March 28, 2007.  -Calculus. Abstract syntax Operational semantics (call-by-value). Simulating Base Types. Booleans Natural numbers Fixed point combinator. Motivation. The  -calculus is expressive.

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491 views • 29 slides

Higher-Order Encodings in Intensional Type Theory

Higher-Order Encodings in Intensional Type Theory. Edwin Westbrook Rice University. Type Systems Give Correctness. “Correct-by-construction” guarantee (For a specific class of potential bugs) ML, Java, Haskell: No runtime type errors More advanced systems:

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295 views • 17 slides

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