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use std::hash::{Hash, Hasher};
use super::inputs::{Input, Position};
#[derive(Debug, Eq)]
pub enum Token<R, I: Input> {
Start {
rule: R,
pos: Position<I>
},
End {
rule: R,
pos: Position<I>
}
}
impl<R: Clone, I: Input> Clone for Token<R, I> {
fn clone(&self) -> Token<R, I> {
match *self {
Token::Start { ref rule, ref pos } => {
Token::Start {
rule: rule.clone(),
pos: pos.clone()
}
}
Token::End { ref rule, ref pos } => {
Token::End {
rule: rule.clone(),
pos: pos.clone()
}
}
}
}
}
impl<R: PartialEq, I: Input> PartialEq for Token<R, I> {
fn eq(&self, other: &Token<R, I>) -> bool {
match *self {
Token::Start { ref rule, ref pos } => {
match *other {
Token::Start { rule: ref other_rule, pos: ref other_pos } => {
rule == other_rule && pos == other_pos
}
_ => false
}
}
Token::End { ref rule, ref pos } => {
match *other {
Token::End { rule: ref other_rule, pos: ref other_pos } => {
rule == other_rule && pos == other_pos
}
_ => false
}
}
}
}
}
impl<R: Hash, I: Input> Hash for Token<R, I> {
fn hash<H: Hasher>(&self, state: &mut H) {
match *self {
Token::Start { ref rule, ref pos } | Token::End { ref rule, ref pos } => {
rule.hash(state);
pos.hash(state);
}
}
}
}