2015-01-09 07:49:59 +03:00
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% Write You a Haskell
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% Stephen Diehl
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% 1/2/2015
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2015-01-19 05:04:01 +03:00
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<!--
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Forward
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=======
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In 2014 I wrote a [short tutorial](http://www.stephendiehl.com/llvm/) about
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building a small imperative language in Haskell that compiled into LLVM. I was
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extremely happy with the effect the tutorial seemed to have, and the warm
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response I got from so many people was very encouraging.
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I've done a great bit of thinking about what the most impactful topic I could
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write about in 2015 could be; and decided throughout this year I will follow up
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with an large endeavor for another project-based tutorial on *building a simple
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functional programming language from first principles*.
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This is a nontrivial topic and is unfortunately very much underserved, the
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knowledge to build such a modern functional language is not widely disseminated
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among many programmers. The available resources most often discuss language
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theory in depth while completely glossing over the engineering details. I wished
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to write a project-based tutorial that included the engineering details and left
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the reader with a fully functional toy language at the end that could be
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extended for further projects.
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We will build a small functional language called *Fun* which is a partial
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Haskell 2010 toy language; complete with a parser, type inference, datatypes,
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pattern matching, desugaring, typeclasses, higher-kinded types, monadic IO,
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arbitrary-rank polymorphism, records, Core language, STG intermediate language,
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lazy evaluation, interpreter, native code generator, a runtime, and several
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optimization passes.
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As with most of my writing, this is the pre-edited rough cut version, which I
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will refine over time. The compiler itself is fully complete as of December
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2014, but each of the chapters (28 in total) will be staggered on a
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month-by-month basis to allow me to progressively refine the text with feedback
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from readers and testers. The later chapters on runtime and code generation are
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somewhat involved and much longer.
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\begin{flushright}
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\textit{Stephen Diehl}
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\end{flushright}
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\clearpage
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-->
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