45 lines
1.6 KiB
Haskell
45 lines
1.6 KiB
Haskell
{- | This module exports functions for compiling Elm to JS
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and some utilities for making it easier to find some Elm-related files.
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Learning resources for Elm are available at
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<http://elm-lang.org.elm/Learn.elm> and many interactive examples are
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available at <http://elm-lang.org/Examples.elm>
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-}
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module Language.Elm (compile, moduleName, runtime, docs) where
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import qualified Data.List as List
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import qualified Data.Map as Map
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import Data.Version (showVersion)
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import Generate.JavaScript (jsModule)
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import Initialize (buildFromSource)
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import Parse.Module (getModuleName)
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import SourceSyntax.Module
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import Text.Blaze.Html (Html)
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import qualified Text.PrettyPrint as P
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import qualified Metadata.Prelude as Prelude
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import Paths_Elm
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import System.IO.Unsafe
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-- |This function compiles Elm code to JavaScript. It will return either
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-- an error message or the compiled JS code.
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compile :: String -> Either String String
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compile source =
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case buildFromSource False interfaces source of
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Left docs -> Left . unlines . List.intersperse "" $ map P.render docs
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Right modul -> Right $ jsModule (modul :: MetadataModule () ())
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{-# NOINLINE interfaces #-}
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interfaces :: Interfaces
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interfaces = unsafePerformIO $ Prelude.interfaces
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-- |This function extracts the module name of a given source program.
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moduleName :: String -> Maybe String
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moduleName = getModuleName
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-- |The absolute path to Elm's runtime system.
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runtime :: IO FilePath
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runtime = getDataFileName "elm-runtime.js"
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-- |The absolute path to Elm's core library documentation.
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docs :: IO FilePath
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docs = getDataFileName "docs.json"
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