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extern crate rust_simple_stack_processor;
use rust_simple_stack_processor::StackMachineError;
#[derive(Debug)]
pub enum ForthError {
UnknownError,
UnknownToken(String),
NumberStackUnderflow,
LoopStackUnderflow,
ScratchStackUnderflow,
InvalidCellOperation,
InvalidSyntax(String),
MissingSemicolonAfterColon,
MissingCommandAfterColon,
SemicolonBeforeColon,
UnhandledTrap,
RanOutOfGas,
InternalNumericOverflow,
}
impl From<StackMachineError> for ForthError {
fn from(err: StackMachineError) -> ForthError {
match err {
StackMachineError::NumberStackUnderflow => ForthError::NumberStackUnderflow,
StackMachineError::LoopStackUnderflow => ForthError::LoopStackUnderflow,
StackMachineError::ScratchStackUnderflow => ForthError::ScratchStackUnderflow,
StackMachineError::InvalidCellOperation => ForthError::InvalidCellOperation,
StackMachineError::UnkownError => ForthError::UnknownError,
StackMachineError::UnhandledTrap => ForthError::UnhandledTrap,
StackMachineError::RanOutOfGas => ForthError::RanOutOfGas,
StackMachineError::NumericOverflow => ForthError::InternalNumericOverflow,
}
}
}
impl From<ForthError> for i32 {
fn from(err: ForthError) -> Self {
match err {
ForthError::UnknownError => 2,
ForthError::UnknownToken(_) => 3,
ForthError::NumberStackUnderflow => 4,
ForthError::LoopStackUnderflow => 5,
ForthError::ScratchStackUnderflow => 13,
ForthError::InvalidCellOperation => 14,
ForthError::InvalidSyntax(_) => 6,
ForthError::MissingSemicolonAfterColon => 7,
ForthError::MissingCommandAfterColon => 8,
ForthError::SemicolonBeforeColon => 9,
ForthError::UnhandledTrap => 10,
ForthError::RanOutOfGas => 11,
ForthError::InternalNumericOverflow => 12,
}
}
}