more parser annotation

src/annotated.rs

@@ -1,6 +1,6 @@
 use std::marker::PhantomData;
 
-use crate::{ParseResult, Parser};
+use crate::{representation::Representation, ParseResult, Parser};
 
 pub struct AnnotatedParser<P, I, O, E>
 where
@@ -8,6 +8,7 @@ where
 {
     inner: P,
     name: Option<String>,
+    repr: Option<Representation>,
     phantom: PhantomData<(I, O, E)>,
 }
 
@@ -32,6 +33,7 @@ where
         Self {
             inner,
             name: None,
+            repr: None,
             phantom: PhantomData,
         }
     }
@@ -42,4 +44,11 @@ where
             ..self
         }
     }
+
+    pub fn with_repr(self, repr: Representation) -> Self {
+        Self {
+            repr: Some(repr),
+            ..self
+        }
+    }
 }

src/lib.rs

@@ -5,6 +5,7 @@ mod combinators;
 mod map;
 mod parser;
 mod primitives;
+mod representation;
 mod sequence;
 
 #[cfg(test)]

src/parser.rs

@@ -28,6 +28,12 @@ pub trait ParserExtension<I, O, E>: Parser<I, O, E> {
     fn then_ignore<O2, P: Parser<I, O2, E>>(self, next: P) -> impl Parser<I, O, E>;
     fn ignore_then<O2, P: Parser<I, O2, E>>(self, next: P) -> impl Parser<I, O2, E>;
     fn surrounded_by<O2>(self, surrounding: impl Parser<I, O2, E>) -> impl Parser<I, O, E>;
+    fn to_anno(self) -> AnnotatedParser<Self, I, O, E>
+    where
+        Self: Sized,
+    {
+        AnnotatedParser::new(self)
+    }
     fn to_named(self, name: &str) -> AnnotatedParser<Self, I, O, E>
     where
         Self: Sized,

src/primitives.rs

@@ -1,10 +1,11 @@
-use crate::{ParseResult, Parser};
+use crate::{representation::Representation, ParseResult, Parser, ParserExtension};
 
-pub fn literal(expected: &'static str) -> impl Fn(&str) -> ParseResult<&str, &str, ()> {
-    move |input| match input.get(0..expected.len()) {
+pub fn literal<'a>(expected: &'static str) -> impl Parser<&'a str, &'a str, ()> {
+    let p = move |input: &'a str| match input.get(0..expected.len()) {
         Some(next) if next == expected => Ok((next, &input[expected.len()..])),
         _ => Err(((), input)),
-    }
+    };
+    p.to_anno().with_repr(Representation::new())
 }
 
 pub fn literal_char<'a>(expected: char) -> impl Parser<&'a str, char, ()> {

src/representation.rs

@@ -0,0 +1,12 @@
+#[derive(Debug)]
+pub struct Representation {}
+
+impl Representation {
+    pub fn show(&self) {
+        println!("Not done");
+    }
+
+    pub fn new() -> Self {
+        Self {}
+    }
+}

src/test/mod.rs

@@ -4,7 +4,7 @@ use super::*;
 
 #[test]
 fn parsing() {
-    let (parsed, rest) = literal("a")("a yolo").unwrap();
+    let (parsed, rest) = literal("a").parse("a yolo").unwrap();
     assert_eq!(parsed, "a");
     assert_eq!(rest, " yolo");
 }