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use self::IResult::*;
use util::ErrorKind;
#[cfg(feature = "core")]
use std::prelude::v1::*;
use std::boxed::Box;
#[derive(Debug,PartialEq,Eq,Clone)]
pub enum Err<P,E=u32>{
Code(ErrorKind<E>),
Node(ErrorKind<E>, Box<Err<P,E>>),
Position(ErrorKind<E>, P),
NodePosition(ErrorKind<E>, P, Box<Err<P,E>>)
}
#[derive(Debug,PartialEq,Eq,Clone,Copy)]
pub enum Needed {
Unknown,
Size(usize)
}
#[derive(Debug,PartialEq,Eq,Clone)]
pub enum IResult<I,O,E=u32> {
Done(I,O),
Error(Err<I,E>),
Incomplete(Needed)
}
impl<I,O> IResult<I,O> {
pub fn is_done(&self) -> bool {
match *self {
Done(_,_) => true,
_ => false
}
}
pub fn is_err(&self) -> bool {
match *self {
Error(_) => true,
_ => false
}
}
pub fn is_incomplete(&self) -> bool {
match *self {
Incomplete(_) => true,
_ => false
}
}
}
pub trait GetInput<I> {
fn remaining_input(&self) -> Option<I>;
}
pub trait GetOutput<O> {
fn output(&self) -> Option<O>;
}
impl<'a,I,O> GetInput<&'a[I]> for IResult<&'a[I],O> {
fn remaining_input(&self) -> Option<&'a[I]> {
match *self {
Done(ref i,_) => Some(*i),
_ => None
}
}
}
impl<'a,O> GetInput<()> for IResult<(),O> {
fn remaining_input(&self) -> Option<()> {
match *self {
Done((),_) => Some(()),
_ => None
}
}
}
impl<'a,I,O> GetOutput<&'a[O]> for IResult<I,&'a[O]> {
fn output(&self) -> Option<&'a[O]> {
match *self {
Done(_, ref o) => Some(*o),
_ => None
}
}
}
impl<'a,I> GetOutput<()> for IResult<I,()> {
fn output(&self) -> Option<()> {
match *self {
Done(_,()) => Some(()),
_ => None
}
}
}