Foreign.Lua.Util

HsLua utility functions.

Documentation

getglobal' :: String -> Lua ()

Like getglobal, but knows about packages and nested tables. E.g.

getglobal' "math.sin"

will return the function sin in package math.

setglobal' :: String -> Lua ()

Like setglobal, but knows about packages and nested tables. E.g.

pushstring "0.9.4"
setglobal' "mypackage.version"

All tables and fields, except for the last field, must exist.

runLua :: Lua a -> IO a

Run lua computation using the default HsLua state as starting point. Raised exceptions are passed through; error handling is the responsibility of the caller.

runLuaEither :: Lua a -> IO (Either LuaException a)

Run the given Lua computation; exceptions raised in haskell code are caught, but other exceptions (user exceptions raised in haskell, unchecked type errors, etc.) are passed through.

data OrNil a

Newtype wrapper intended to be used for optional Lua values. Nesting this type is strongly discouraged as missing values on inner levels are indistinguishable from missing values on an outer level; wrong values would be the likely result.

Instances

FromLuaStack a => FromLuaStack (OrNil a)

Methods

peek :: StackIndex -> Lua (OrNil a)

ToLuaStack a => ToLuaStack (OrNil a)

Methods

push :: OrNil a -> Lua ()