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- David N. Turner, Philip Wadler, Christian Mossin
- FPCA
- 1995

A number of useful optimisations are enabled if we can determine when a value is accessed at most once. We extend the Hindley-Milner type system with uses, yielding a typeinference based program analysis which determines when values are accessed at most once. Our analysis can handle higher-order functions and data structures, and admits principal types for… (More)

- Dirk Dussart, Fritz Henglein, Christian Mossin
- SAS
- 1995

The combination of parameter polymorphism, subtyping extended to qualified and polymorphic types, and polymorphic recursion is useful in standard type inference and gives expressive type-based program analyses, but raises difficult algorithmic problems. In a program analysis context we show how Mycroft’s iterative method of computing principal types for a… (More)

- Fritz Henglein, Christian Mossin
- ESOP
- 1994

Binding time analysis is an important part of off-line partial evaluation, annotating expressions as being safely evaluable from known data or possibly depending on unknown data. Most binding-time analyses have been monovariant, allowing only one binding-time description for each function. The idea of polyvariance is to allow multiple binding time… (More)

AnnoDomini is a source-to-source conversion tool for making COBOL programs Year 2000 compliant. It is technically and conceptually built upon type-theoretic techniques and methods: type-based specification, program analysis by type inference and type-directed transformation. These are combined into an integrated software reengineering tool and method for… (More)

- Christian Mossin
- Mathematical Structures in Computer Science
- 1997

We present a type-based flow analysis for simply typed lambda calculus with booleans, data-structures and recursion. The analysis is exact in the following sense: if the analysis predicts a redex, then there exists a reduction sequence (using standard reduction plus context propagation rules) such that this redex will be reduced. The precision is… (More)

- Christian Mossin
- PEPM
- 1993

Applications of partial evaluation have so far mainly focused on generation of compilers from interpreters for programming languages. We partially evaluate a simple general <italic>LR(k)</italic> parsing algorithm. To obtain good results, we rewrite the algorithm using a number of binding-time improvements. The final LR(1) parser has been specialized using… (More)

- Christian Mossin
- Nord. J. Comput.
- 1997

The concepts of value-and control-ow graphs are important for program analysis of imperative programs. An imperative value ow graph can be constructed by a single pass over the program text. No similar concepts exist for higher-order languages: we propose a method for constructing value ow graphs for typed higher-order functional languages. A higher-order… (More)

AnnoDomini is a commercially available source-to-source conversion tool for finding and fixing Year 2000 problems in COBOL programs. AnnoDomini uses type-based specification, analysis, and transformation to achieve its main design goals: flexibility, completeness, correctness, and a high degree of safe automation.

A number of useful optimisations are enabled if we can determine when a value is accessed at most once. We extend the Hindley-Milner type system with uses, yielding a type-inference based program analysis which determines when values are accessed at most once. Our analysis can handle higher-order functions and data structures, and admits principal types for… (More)

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