use super::stack_machine::StackMachineError;

//type StackType = i32;

/// This Enum lists the errors that the Forth Interpreter might return

pub enum ForthError {

    UnknownError,

    DROPOfEmptyStack,

    MissingSemicolonAfterColon,

    //  Io(std::io::Error),

    UnhandledTrap,

    RanOutOfGas,

}

/*

/// Convert io::Errors to a ForthError so our Interpreter functions can

/// return a single Error type.

impl From<std::io::Error> for ForthError {

    fn from(err: std::io::Error) -> ForthError {

        ForthError::Io(err)

    }

}

*/

/// Convert StackMachineError to a ForthError so our Interpreter functions can

/// return a single Error type.

impl From<StackMachineError> for ForthError {

        }

}

/*

/// Helper to convert ForthError codes to numeric codes for exit()

impl From<ForthError> for StackType {

    fn from(err: ForthError) -> Self {

        match err {

            ForthError::UnknownError => 2,

            ForthError::UnknownToken(_) => 3,

            ForthError::DROPOfEmptyStack => 4,

            ForthError::InvalidSyntax(_) => 5,

            ForthError::MissingSemicolonAfterColon => 6,

            ForthError::Io(_) => 7,

            ForthError::UnhandledTrap => 8,

            ForthError::RanOutOfGas => 9,

            ForthError::ConstantAlreadyExists(_) => 10,

            ForthError::ConstantDoesNotExist(_) => 11,

        }

    }

}

*/