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    A Practical Soft Type System for Scheme

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    Author
    Cartwright, Robert; Wright, Andrew
    Date
    December 6, 1993
    Abstract
    Soft type systems provide the benefits of static type checking for dynamically typed languages without rejecting untypable programs. A soft type checker infers types for variables and expressions and inserts explicit run-time checks to transform untypable programs to typable form. We describe a practical soft type system for R4RS Scheme. Our type checker uses a representation for types that is expressive, easy to interpret, and supports efficient type inference. Soft Scheme supports all of R4RS Scheme, including procedures of fixed and variable arity, assignment, continuations, and top-level definitions. Our implementation is available by anonymous FTP.
    Citation
    Cartwright, Robert and Wright, Andrew. "A Practical Soft Type System for Scheme." (1993) https://hdl.handle.net/1911/96436.
    Type
    Technical report
    Citable link to this page
    https://hdl.handle.net/1911/96436
    Rights
    You are granted permission for the noncommercial reproduction, distribution, display, and performance of this technical report in any format, but this permission is only for a period of forty-five (45) days from the most recent time that you verified that this technical report is still available from the Computer Science Department of Rice University under terms that include this permission. All other rights are reserved by the author(s).
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
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    Site Map