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use super::{ParseError, ParseState};
#[derive(Debug, Clone)]
pub struct ParseOk<'a, T> {
pub result: T,
pub state: ParseState<'a>,
}
impl<'a, T> ParseOk<'a, T> {
#[inline]
pub fn map<T2, F>(self, f: F) -> ParseOk<'a, T2>
where
F: Fn(T) -> T2,
{
ParseOk::<T2> {
result: f(self.result),
state: self.state,
}
}
#[inline]
pub fn map_with_state<T2, F>(self, f: F) -> ParseOk<'a, T2>
where
F: Fn(T, &ParseState) -> T2,
{
ParseOk::<T2> {
result: f(self.result, &self.state),
state: self.state,
}
}
}
pub type ParseResult<'a, T> = Result<ParseOk<'a, T>, ParseError>;
pub trait ParseResultExtras<'a, T> {
fn discard_result(self) -> ParseResult<'a, ()>;
fn map_inner<T2, F>(self, f: F) -> ParseResult<'a, T2>
where
F: Fn(T) -> T2;
}
impl<'a, T> ParseResultExtras<'a, T> for ParseResult<'a, T> {
#[inline]
fn discard_result(self) -> ParseResult<'a, ()> {
self.map_inner(|_| ())
}
#[inline]
fn map_inner<T2, F>(self, f: F) -> ParseResult<'a, T2>
where
F: Fn(T) -> T2,
{
self.map(|ok| ok.map(f))
}
}