Difference between revisions of "HaskellWiki:Syntax highlighting"
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putStr ("And the answer is: " ++(show (fst a))++"\n") |
putStr ("And the answer is: " ++(show (fst a))++"\n") |
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</haskell> |
</haskell> |
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| − | : Question: Would it be possible to have an markup tag, say <code><haskell-pretty></code> which would utilize the <code><math></code> environment to produce neat looking things like <math>\operatorname{foo} :: \forall \alpha \beta . \alpha \rightarrow \beta</math>, corresponding to <hask>foo :: forall a b. a -> b</hask>. |
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== Inline formatting with <code><hask></code> == |
== Inline formatting with <code><hask></code> == |
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Revision as of 23:31, 13 March 2006
Syntax highlighting works for a bunch of languages including Haskell, using GeSHi and Jason Dagit's Haskell file, somewhat modified.
Block formatting with <haskell>
To highlight syntax of a block of Haskell, enclose it in <haskell>...</haskell>. This uses the <pre> element. For instance:
{-
My program
-}
import Prelude
foo :: (Monad m) -> m (Int,Int)
foo = (x-2,x - 1) where
x = 3
-- The main function
main :: IO ()
main = do
a <- foo
putStr ("And the answer is: " ++(show (fst a))++"\n")
Inline formatting with <hask>
To highlight syntax of inline Haskell snippets, enclose the span in <hask>...</hask>. This uses the <code> element, which is inline. For instance: import Prelude.
Inline highlighting is a bit of a hack at the moment, and may be buggy.
Styles
For Haskell (only) I have deliberately removed all formatting apart from foreground colour, and those I have tried to keep dark so as not to be visually distracting.
This is what I am trying to achieve:
- comments: grey
- keywords (including symbols): blue
- value literals: dark green
- known value identifiers (including symbols): green
- known type identifiers: red
- known classes: purple
- known modules: brown
I may also indent the entire block, similar to <blockquote>.
—Ashley Y 07:46, 10 March 2006 (UTC)
Other languages
This works for certain other languages too. For lisp, for instance, use <pre-lisp>...</pre-lisp> to format a block of lisp, and <code-lisp>...</code-lisp> to format text inline. <haskell> the same as <pre-haskell> and <hask> the same as <code-haskell>.