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        {\bf Enumerated Types in \CFA}

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        by \\

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        \Large
        Jiada Liang \\

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        A thesis \\
        presented to the University of Waterloo \\
        in fulfillment of the \\
        thesis requirement for the degree of \\
        Master of Mathematics \\
        in \\
        Computer Science \\

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        Waterloo, Ontario, Canada, \the\year \\

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        \copyright{} Jiada Liang \the\year \\
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% E X A M I N I N G   C O M M I T T E E (Required for Ph.D. theses only)
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\addcontentsline{toc}{chapter}{Examining Committee}
\begin{center}\textbf{Examining Committee Membership}\end{center}
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The following served on the Examining Committee for this thesis. The decision of the Examining Committee is by majority vote.
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Internal-External Member: \=  \kill % using longest text to define tab length
External Examiner: \>  Bruce Bruce \\
\> Professor, Dept. of Philosophy of Zoology, University of Wallamaloo \\
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Supervisor(s): \> Ann Elk \\
\> Professor, Dept. of Zoology, University of Waterloo \\
\> Andrea Anaconda \\
\> Professor Emeritus, Dept. of Zoology, University of Waterloo \\
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Internal Member: \> Pamela Python \\
\> Professor, Dept. of Zoology, University of Waterloo \\
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Internal-External Member: \=  \kill % using longest text to define tab length
Internal-External Member: \> Meta Meta \\
\> Professor, Dept. of Philosophy, University of Waterloo \\
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Internal-External Member: \=  \kill % using longest text to define tab length
Other Member(s): \> Leeping Fang \\
\> Professor, Dept. of Fine Art, University of Waterloo \\
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I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners.

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I understand that my thesis may be made electronically available to the public.

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% A B S T R A C T
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\addcontentsline{toc}{chapter}{Abstract}
\begin{center}\textbf{Abstract}\end{center}

% An enumeration is a type defining an ordered set of named constant values, where a name abstracts a value, \eg @PI@ versus @3.145159@.
% C restrict an enumeration type to the integral type @signed int@, which \CC support, meaning enumeration names bind to integer constants.
% \CFA extends C enumerations to allow all basic and custom types for the enumeration type, like other modern programming languages.
% Furthermore, \CFA adds other useful features for enumerations to support better software-engineering practices and simplify program development.
The \CFA (C-for-all) programming language is an evolutionary refinement of C programing language. One of its distinctive feature is the generic 
types. But legacy data type from C, such as enumerations, does not adapt well into the \CFA generic type system.

This thesis presents an adaptation of enumerated types, in a way that integrates naturallly with the generic type feature of \CFA while being 
backward-compatiable to C. This thesis also presents a number of smaller refinement to the \CFA overload resolution rules for enumerated types, 
each of which improves the intuitive nature of enumerations. 
The enumeration types improvement has been implemented into \CFA compiler and run-time environment. The root ideas behinds the change of 
enumeration is to discover the approach of C data types working with \CFA generic types in order to improve the language expressiveity and safety.
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% A C K N O W L E D G E M E N T S
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\begin{center}\textbf{Acknowledgements}\end{center}

To begin, I would like to thank my supervisor Proferssor Peter Buhr. Thank you for your guidance and 
support throughout my study and research. I would not be here without you.

Thanks Gregor Richards and Yzihou Zhang for reading my thesis.

Special thanks to Andrew James Beach for your insight on the theory development on the thesis.

Thanks to Michael Brooks, Fangran Yu, Colby Parsons, Thierry Delisle, Mubeen Zulifiqar,
 and entire Cforall team for development of the \CFA language, making it the best language it can be.

Finally, a special thank you to Huawei Canada for funding this work.

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This is dedicated to the one I love.
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