[Haskell-cafe] yi or not to yi was: IDE?

[Isaac Dupree]

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Andrew Coppin wrote:
> OTOH... how the heck do you write an operating system in a language that
> doesn't even support I/O? :-S

Back when I was first learning programming, with C, I had that exact
same question: how the heck can your program DO anything, when the
language consists of a bunch of functions that are executed that can
only modify meaningless variables your program defines? (C standard
defines modifications to volatile variables as side-effects, actually.)

It's because your environment knows how to call into the kernel, the
kernel knows how to make you computer do things - and that usually
involves a bit of assembly, because the C language doesn't define
non-program-logic for the compiler to translate.  Source-language
extensions to C allow inline assembly (and much more), so I'm sure
something appropriate could be done for Haskell if that was judged as
the best approach.


Isaac
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