Lackwit: a program understanding tool based on type inference
ICSE '97 Proceedings of the 19th international conference on Software engineering
AnnoDomini: from type theory to Year 2000 conversion tool
Proceedings of the 26th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
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Proceedings of the 26th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Dynamically discovering likely program invariants to support program evolution
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Proceedings of the 21st international conference on Software engineering
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ACM Transactions on Software Engineering and Methodology (TOSEM)
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Proceedings of the 24th International Conference on Software Engineering
Understanding COBOL Systems using Inferred Types
IWPC '99 Proceedings of the 7th International Workshop on Program Comprehension
Dependent types in practical programming
Dependent types in practical programming
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Unified Modeling Language Reference Manual, The (2nd Edition)
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Proceedings of the 28th international conference on Software engineering
Using logical data models for understanding and transforming legacy business applications
IBM Systems Journal - Model-driven software development
Bit level types for high level reasoning
Proceedings of the 14th ACM SIGSOFT international symposium on Foundations of software engineering
Recovering structured data types from a legacy data model with overlays
Information and Software Technology
State of the union: type inference via Craig interpolation
TACAS'07 Proceedings of the 13th international conference on Tools and algorithms for the construction and analysis of systems
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Journal of Software Maintenance and Evolution: Research and Practice - Working Conference on Reverse Engineering (WCRE 2008)
Logical types for untyped languages
Proceedings of the 15th ACM SIGPLAN international conference on Functional programming
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RV'10 Proceedings of the First international conference on Runtime verification
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POPL '12 Proceedings of the 39th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages
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Weakly-typed languages such as Cobol often force programmers to represent distinct data abstractions using the same low-level physical type. In this paper, we describe a technique to recover implicitly-defined data abstractions from programs using type inference. We present a novel system of dependent types which we call guarded types, a path-sensitive algorithm for inferring guarded types for Cobol programs, and a semantic characterization of correct guarded typings. The results of our inference technique can be used to enhance program understanding for legacy applications, and to enable a number of type-based program transformations.