| Copyright | © 2017-2023 Albert Krewinkel |
|---|---|
| License | MIT |
| Maintainer | Albert Krewinkel <tarleb@hslua.org> |
| Safe Haskell | Safe-Inferred |
| Language | Haskell2010 |
HsLua.Aeson
Contents
Description
Pushes and retrieves aeson Values to and from the Lua stack.
- JSON
nullvalues are encoded as light userdata containing theNULLpointer. - Objects are converted to string-indexed tables.
- Arrays are converted to sequence tables and are given a
metatable. This makes it possible to distinguish between empty
arrays and empty objects. The metatable is stored in the
registry under key
'HsLua JSON array'' (see alsojsonarray). - JSON numbers are converted to Lua numbers, i.e.,
Number; the exact C type may vary, depending on compile-time Lua configuration.
Synopsis
- peekValue :: LuaError e => Peeker e Value
- pushValue :: LuaError e => Pusher e Value
- peekViaJSON :: (FromJSON a, LuaError e) => Peeker e a
- pushViaJSON :: (ToJSON a, LuaError e) => Pusher e a
- jsonarray :: Name
- peekToAeson :: Peeker e (ToAeson e)
- pushToAeson :: Pusher e (ToAeson e)
Documentation
pushValue :: LuaError e => Pusher e Value Source #
Hslua StackValue instance for the Aeson Value data type.
peekViaJSON :: (FromJSON a, LuaError e) => Peeker e a Source #
Retrieves a value from the Lua stack via JSON.
pushViaJSON :: (ToJSON a, LuaError e) => Pusher e a Source #
Pushes a value to the Lua stack as a JSON-like value.
Name of the registry slot holding the metatable given to array tables. The registry entry can be replaced with a different table if needed.
Encoding arbitrary objects
peekToAeson :: Peeker e (ToAeson e) Source #
Gets the ToAeson function from a Lua userdata object.
pushToAeson :: Pusher e (ToAeson e) Source #
Pushes a function that converts the object at a given index into a
Value.