Scripting.Duktape

Haskell bindings for duktape, a very compact embedded ECMAScript (JavaScript) engine.

Concurrency note: you can't execute code with the same context from multiple threads in parallel. If you use the same context from multiple threads, only one will run at a time, others will block.

Documentation

type DuktapeCtx = MVar (ForeignPtr DuktapeHeap)

createDuktapeCtx :: MonadIO μ => μ (Maybe DuktapeCtx)

Creates a Duktape context.

evalDuktape :: MonadIO μ => DuktapeCtx -> ByteString -> μ (Either String (Maybe Value))

Evaluates a string of ECMAScript on a given Duktape context.

Note: a top level object, like {some: thing}, is not a valid string to evaluate. You'd need to at least wrap it in parens, like ({some: thing}).

callDuktape

Arguments

:: MonadIO μ

=> DuktapeCtx

-> Maybe ByteString

The name of the object that contains the function (Nothing is the global object)

-> ByteString

The function name

-> [Value]

The arguments

-> μ (Either String (Maybe Value))

Calls an ECMAScript function on a given Duktape context, passing in arguments from the Haskell world.

exposeFnDuktape

Arguments

:: (MonadIO μ, Duktapeable ξ)

=> DuktapeCtx

-> Maybe ByteString

The name of the object that will contain the function (Nothing is the global object)

-> ByteString

The function name

-> ξ

The function itself

-> μ (Either String ())

Makes a Haskell function available in ECMAScript.

class Duktapeable ξ

Minimal complete definition

runInDuktape, argCount

Instances

Duktapeable (IO ())

Methods

runInDuktape :: IO () -> Ptr DuktapeHeap -> IO CInt

argCount :: IO () -> Int

Duktapeable (IO Value)

Methods

runInDuktape :: IO Value -> Ptr DuktapeHeap -> IO CInt

argCount :: IO Value -> Int

Duktapeable (Value -> Value -> Value -> Value -> Value -> IO Value)

Methods

runInDuktape :: (Value -> Value -> Value -> Value -> Value -> IO Value) -> Ptr DuktapeHeap -> IO CInt

argCount :: (Value -> Value -> Value -> Value -> Value -> IO Value) -> Int

Duktapeable (Value -> Value -> Value -> Value -> IO Value)

Methods

runInDuktape :: (Value -> Value -> Value -> Value -> IO Value) -> Ptr DuktapeHeap -> IO CInt

argCount :: (Value -> Value -> Value -> Value -> IO Value) -> Int

Duktapeable (Value -> Value -> Value -> IO Value)

Methods

runInDuktape :: (Value -> Value -> Value -> IO Value) -> Ptr DuktapeHeap -> IO CInt

argCount :: (Value -> Value -> Value -> IO Value) -> Int

Duktapeable (Value -> Value -> IO Value)

Methods

runInDuktape :: (Value -> Value -> IO Value) -> Ptr DuktapeHeap -> IO CInt

argCount :: (Value -> Value -> IO Value) -> Int

Duktapeable (Value -> IO Value)

Methods

runInDuktape :: (Value -> IO Value) -> Ptr DuktapeHeap -> IO CInt

argCount :: (Value -> IO Value) -> Int