Safe Haskell | Safe |
---|---|
Language | Haskell2010 |
The Convert module contains various functions used for converting values to or from their FFI form. It also contains Error types in case conversions to not go as planned.
- fromBoolean :: Boolean -> Either ConversionError Bool
- data ConversionError
Documentation
fromBoolean :: Boolean -> Either ConversionError Bool Source #
This method tries to to turn a number returned by FFI into a Bool. It's wrapped in an either in case the underlying number representing the Boolean is not 0 or 1
>>>
fromBoolean 1
Right True
>>>
fromBoolean 0
Right False
>>>
fromBoolean 3
Left Failed to extract a boolean value in the use of fromBoolean. Number was not 0 or 1
data ConversionError Source #
Error data type for conversions that have failed going to or from their FFI form