Foreign.Lua.Aeson

Glue to hslua for aeson values.

This provides a StackValue instance for aeson's Value type. The following conventions are used:

• Null values are encoded as a special value (stored in the registry field HSLUA_AESON_NULL). Using nil would cause problems with null-containing arrays.
• Objects are converted to tables in a straight-forward way.
• Arrays are converted to lua tables. Array-length is included as the value at index 0. This makes it possible to distinguish between empty arrays and empty objects.
• JSON numbers are converted to Lua numbers (usually doubles), which can cause a loss of precision.

Documentation

pushNull :: Lua ()

Push the value which represents JSON null values to the stack (a specific empty table by default). Internally, this uses the contents of the HSLUA_AESON_NULL registry field; modifying this field is possible, but it must always be non-nil.

Orphan instances

Peekable Scientific

Methods

peek :: StackIndex -> Lua Scientific

Peekable Value

Methods

peek :: StackIndex -> Lua Value

Pushable Scientific

Methods

push :: Scientific -> Lua ()

Pushable Value

Hslua StackValue instance for the Aeson Value data type.

Methods

push :: Value -> Lua ()

Peekable a => Peekable (Vector a)

Methods

peek :: StackIndex -> Lua (Vector a)

Pushable a => Pushable (Vector a)

Methods

push :: Vector a -> Lua ()

(Eq a, Hashable a, Peekable a, Peekable b) => Peekable (HashMap a b)

Methods

peek :: StackIndex -> Lua (HashMap a b)

(Eq a, Hashable a, Pushable a, Pushable b) => Pushable (HashMap a b)

Methods

push :: HashMap a b -> Lua ()