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use crate::{
gen_parser::GenParser,
map_parser::MapParser,
order_parser::OrderParser,
repetition_parser::RepetitionParser,
sequence_parser::SequenceParser,
stringify_parser::StringifyParser,
Error,
};
use std::{
fmt::{
Debug,
Display,
},
usize::MAX,
};
pub trait Parser<'a>: Debug
{
type Error: Error;
type Output;
type Requirement: Debug + Display;
type RequirementContext;
fn parse(&self, src: &'a str, pos: &mut usize) -> Result<Self::Output, Self::Error>;
fn skip(&self, src: &'a str, pos: &mut usize) -> Result<(), Self::Error>
{
self.parse(src, pos).map(|_| ())
}
fn requirement(&self, context: Option<&Self::RequirementContext>) -> Self::Requirement;
fn and_then<P>(self, next: P) -> SequenceParser<'a, Self, P>
where
Self: Sized,
P: Parser<'a>,
{
SequenceParser::new(self, next)
}
fn or<P>(self, next: P) -> OrderParser<'a, Self, P>
where
Self: Sized,
P: Parser<'a>,
{
OrderParser::new(self, next)
}
fn map<R>(self, mapper: &'a Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
where
Self: Sized,
{
MapParser::new(self, mapper)
}
fn and_gen<P>(self, generator: &'a Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
where
Self: Sized,
P: Parser<'a>,
{
GenParser::new(self, generator)
}
fn repeat(self, min: usize, max: usize) -> RepetitionParser<'a, Self>
where
Self: Sized,
{
RepetitionParser::new(self, min, max)
}
fn zero_or_more(self) -> RepetitionParser<'a, Self>
where
Self: Sized,
{
RepetitionParser::new(self, 0, MAX)
}
fn one_or_more(self) -> RepetitionParser<'a, Self>
where
Self: Sized,
{
RepetitionParser::new(self, 1, MAX)
}
fn stringify(self) -> StringifyParser<'a, Self>
where
Self: Sized,
{
StringifyParser::new(self)
}
}