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subtrees/parser-combinator/.gitignore
vendored
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subtrees/parser-combinator/.gitignore
vendored
@ -1,2 +0,0 @@
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/target
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/Cargo.lock
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@ -1,13 +0,0 @@
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[package]
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name = "parser-combinator"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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arbitrary = "1.2.0"
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proptest = "1.0.0"
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[dev-dependencies]
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rstest = "0.16.0"
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@ -1,10 +0,0 @@
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# Rust Parser Combinator
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This is a super-basic Rust parser combinator library I wrote mostly
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as an exercise for myself. Inspired by [nom](https://github.com/rust-bakery/nom)
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and [chumsky](https://github.com/zesterer/chumsky)
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## Ideas for future work
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* See if some of the ideas in [Efficient Parsing with Parser Combinators](https://research.rug.nl/en/publications/efficient-parsing-with-parser-combinators)
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can be incorporated here.
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@ -1,198 +0,0 @@
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use crate::parser::{ParseResult, Parser, ParserInput, Representation};
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pub fn choice2<P1, P2, I, O, E>(parser1: P1, parser2: P2) -> impl Parser<I, O, E>
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where
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P1: Parser<I, O, E>,
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P2: Parser<I, O, E>,
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I: ParserInput + Clone,
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{
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choice((parser1, parser2))
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}
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pub fn choice<C, I, O, E>(choices: C) -> impl Parser<I, O, E>
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where
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C: Choice<I, O, E>,
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I: ParserInput + Clone,
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{
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let rep = choices.representation();
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(move |input| choices.parse(input), rep)
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}
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pub trait Choice<I: Clone, O, E> {
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fn parse(&self, input: I) -> ParseResult<I, O, E>;
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fn representation(&self) -> Representation;
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}
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impl<I, O, E, P1, P2> Choice<I, O, E> for (P1, P2)
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where
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P1: Parser<I, O, E>,
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P2: Parser<I, O, E>,
|
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I: ParserInput + Clone,
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{
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fn parse(&self, input: I) -> ParseResult<I, O, E> {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1];
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choice_loop(input, parsers)
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}
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|
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fn representation(&self) -> Representation {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1];
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repr_loop(parsers)
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}
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}
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impl<I, O, E, P1, P2, P3> Choice<I, O, E> for (P1, P2, P3)
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where
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P1: Parser<I, O, E>,
|
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P2: Parser<I, O, E>,
|
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P3: Parser<I, O, E>,
|
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I: ParserInput + Clone,
|
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{
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fn parse(&self, input: I) -> ParseResult<I, O, E> {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1, &self.2];
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choice_loop(input, parsers)
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}
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fn representation(&self) -> Representation {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1, &self.2];
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repr_loop(parsers)
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}
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}
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impl<I, O, E, P1, P2, P3, P4> Choice<I, O, E> for (P1, P2, P3, P4)
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where
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P1: Parser<I, O, E>,
|
||||
P2: Parser<I, O, E>,
|
||||
P3: Parser<I, O, E>,
|
||||
P4: Parser<I, O, E>,
|
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I: ParserInput + Clone,
|
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{
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fn parse(&self, input: I) -> ParseResult<I, O, E> {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1, &self.2, &self.3];
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choice_loop(input, parsers)
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}
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fn representation(&self) -> Representation {
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let parsers = vec![&self.0 as &dyn Parser<I, O, E>, &self.1, &self.2, &self.3];
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repr_loop(parsers)
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}
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}
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impl<I, O, E, P1, P2, P3, P4, P5> Choice<I, O, E> for (P1, P2, P3, P4, P5)
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where
|
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P1: Parser<I, O, E>,
|
||||
P2: Parser<I, O, E>,
|
||||
P3: Parser<I, O, E>,
|
||||
P4: Parser<I, O, E>,
|
||||
P5: Parser<I, O, E>,
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
let parsers = vec![
|
||||
&self.0 as &dyn Parser<I, O, E>,
|
||||
&self.1,
|
||||
&self.2,
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&self.3,
|
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&self.4,
|
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];
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choice_loop(input, parsers)
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}
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fn representation(&self) -> Representation {
|
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let parsers = vec![
|
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&self.0 as &dyn Parser<I, O, E>,
|
||||
&self.1,
|
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&self.2,
|
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&self.3,
|
||||
&self.4,
|
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];
|
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repr_loop(parsers)
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}
|
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}
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|
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impl<I, O, E, P1, P2, P3, P4, P5, P6> Choice<I, O, E> for (P1, P2, P3, P4, P5, P6)
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where
|
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P1: Parser<I, O, E>,
|
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P2: Parser<I, O, E>,
|
||||
P3: Parser<I, O, E>,
|
||||
P4: Parser<I, O, E>,
|
||||
P5: Parser<I, O, E>,
|
||||
P6: Parser<I, O, E>,
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
let parsers = vec![
|
||||
&self.0 as &dyn Parser<I, O, E>,
|
||||
&self.1,
|
||||
&self.2,
|
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&self.3,
|
||||
&self.4,
|
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&self.5,
|
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];
|
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choice_loop(input, parsers)
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}
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fn representation(&self) -> Representation {
|
||||
let parsers = vec![
|
||||
&self.0 as &dyn Parser<I, O, E>,
|
||||
&self.1,
|
||||
&self.2,
|
||||
&self.3,
|
||||
&self.4,
|
||||
&self.5,
|
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];
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repr_loop(parsers)
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}
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}
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fn choice_loop<I, O, E>(input: I, parsers: Vec<&dyn Parser<I, O, E>>) -> ParseResult<I, O, E>
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where
|
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I: ParserInput + Clone,
|
||||
{
|
||||
//TODO need a more principled way to return an error when no choices work
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let mut err = None;
|
||||
|
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for parser in parsers.iter() {
|
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match parser.parse(input.clone()) {
|
||||
Ok(result) => return Ok(result),
|
||||
Err(e) => {
|
||||
err = Some(e);
|
||||
}
|
||||
}
|
||||
}
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Err(err.unwrap())
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}
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fn repr_loop<I, O, E>(parsers: Vec<&dyn Parser<I, O, E>>) -> Representation
|
||||
where
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
let mut iter = parsers.iter().map(|p| p.representation());
|
||||
Representation::from_choice(&mut iter)
|
||||
}
|
||||
|
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#[cfg(test)]
|
||||
mod tests {
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||||
use super::*;
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use crate::combinators::repeated;
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use crate::primitives::literal;
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||||
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#[test]
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fn test_choice() {
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let p = choice2(
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literal("gnostika").to(1),
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repeated(literal(" ")).at_least(1).to(2),
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);
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assert_eq!(p.parse("gnostika twentynine"), Ok((1, " twentynine")));
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}
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#[test]
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fn test_several_choices() {
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let p = choice((
|
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literal("a").to(1),
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literal("q").to(10),
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repeated(literal("chutney")).to(200),
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literal("banana").to(10000),
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));
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assert_eq!(p.parse("q drugs").unwrap(), (10, " drugs"));
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}
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}
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@ -1,16 +0,0 @@
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use crate::parser::{Parser, ParserInput};
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pub fn map<P, F, I, O1, O2, E>(parser: P, map_fn: F) -> impl Parser<I, O2, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
P: Parser<I, O1, E>,
|
||||
F: Fn(O1) -> O2,
|
||||
{
|
||||
let rep = parser.representation();
|
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let p = move |input| {
|
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parser
|
||||
.parse(input)
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.map(|(result, rest)| (map_fn(result), rest))
|
||||
};
|
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(p, rep)
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}
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@ -1,66 +0,0 @@
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mod map;
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mod optional;
|
||||
mod repeated;
|
||||
mod separated_by;
|
||||
|
||||
pub use map::map;
|
||||
pub use optional::optional;
|
||||
pub use repeated::repeated;
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use crate::parser::Parser;
|
||||
use crate::primitives::literal;
|
||||
|
||||
#[test]
|
||||
fn test_map() {
|
||||
let lit_a = literal("a");
|
||||
let output = lit_a.map(|s| s.to_uppercase()).parse("a yolo");
|
||||
assert_eq!(output.unwrap(), ("A".to_string(), " yolo"));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_one_or_more() {
|
||||
let p = repeated(literal("bongo ")).at_least(1);
|
||||
let input = "bongo bongo bongo bongo bongo ";
|
||||
|
||||
let (output, rest) = p.parse(input).unwrap();
|
||||
assert_eq!(rest, "");
|
||||
assert_eq!(output.len(), 5);
|
||||
|
||||
let (output, rest) = p.parse("bongo ecks").unwrap();
|
||||
assert_eq!(output.len(), 1);
|
||||
assert_eq!(rest, "ecks");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_separated_by() {
|
||||
let p = repeated(literal("garb").to(20))
|
||||
.separated_by(repeated(literal(" ")).at_least(1), false);
|
||||
|
||||
assert_eq!(
|
||||
p.parse("garb garb garb garb").unwrap(),
|
||||
(vec![20, 20, 20, 20], "")
|
||||
);
|
||||
|
||||
assert!(p.parse("garb garb garb garb ").is_err());
|
||||
|
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let p =
|
||||
repeated(literal("garb").to(20)).separated_by(repeated(literal(" ")).at_least(1), true);
|
||||
|
||||
assert_eq!(
|
||||
p.parse("garb garb garb garb").unwrap(),
|
||||
(vec![20, 20, 20, 20], "")
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
p.parse("garb garb garb garb ").unwrap(),
|
||||
(vec![20, 20, 20, 20], "")
|
||||
);
|
||||
assert_eq!(
|
||||
p.parse("garb garb garb garb q").unwrap(),
|
||||
(vec![20, 20, 20, 20], "q")
|
||||
);
|
||||
}
|
||||
}
|
||||
@ -1,17 +0,0 @@
|
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use crate::parser::{Parser, ParserInput, Representation};
|
||||
|
||||
pub fn optional<P, I, O, E>(parser: P) -> impl Parser<I, Option<O>, E>
|
||||
where
|
||||
P: Parser<I, O, E>,
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
let rep = Representation::from_choice(
|
||||
&mut [parser.representation(), Representation::new("ε")].into_iter(),
|
||||
);
|
||||
let p = move |input: I| match parser.parse(input.clone()) {
|
||||
Ok((output, rest)) => Ok((Some(output), rest)),
|
||||
Err(_e) => Ok((None, input)),
|
||||
};
|
||||
|
||||
(p, rep)
|
||||
}
|
||||
@ -1,94 +0,0 @@
|
||||
use crate::combinators::separated_by::SeparatedBy;
|
||||
use crate::parser::{BoxedParser, ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub fn repeated<'a, P, I, O>(parser: P) -> Repeated<'a, I, O>
|
||||
where
|
||||
P: Parser<I, O, I> + 'a,
|
||||
I: ParserInput + Clone + 'a,
|
||||
{
|
||||
Repeated {
|
||||
inner_parser: BoxedParser::new(parser),
|
||||
at_least: None,
|
||||
at_most: None,
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Repeated<'a, I, O>
|
||||
where
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
pub(super) inner_parser: BoxedParser<'a, I, O, I>,
|
||||
pub(super) at_least: Option<u16>,
|
||||
pub(super) at_most: Option<u16>,
|
||||
}
|
||||
|
||||
impl<'a, I, O> Repeated<'a, I, O>
|
||||
where
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
pub fn at_least(self, n: u16) -> Self {
|
||||
Self {
|
||||
at_least: Some(n),
|
||||
..self
|
||||
}
|
||||
}
|
||||
pub fn at_most(self, n: u16) -> Self {
|
||||
Self {
|
||||
at_most: Some(n),
|
||||
..self
|
||||
}
|
||||
}
|
||||
|
||||
pub fn separated_by<D, O2>(self, delimiter: D, allow_trailing: bool) -> SeparatedBy<'a, I, O>
|
||||
where
|
||||
D: Parser<I, O2, I> + 'a,
|
||||
O2: 'a,
|
||||
I: 'a,
|
||||
{
|
||||
SeparatedBy {
|
||||
inner_repeated: self,
|
||||
delimiter: BoxedParser::new(delimiter.to(())),
|
||||
allow_trailing,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, I, O> Parser<I, Vec<O>, I> for Repeated<'a, I, O>
|
||||
where
|
||||
I: ParserInput + Clone + 'a,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, Vec<O>, I> {
|
||||
let at_least = self.at_least.unwrap_or(0);
|
||||
let at_most = self.at_most.unwrap_or(u16::MAX);
|
||||
|
||||
if at_most == 0 {
|
||||
return Ok((vec![], input));
|
||||
}
|
||||
|
||||
let mut results = Vec::new();
|
||||
let mut count: u16 = 0;
|
||||
let mut further_input = input.clone();
|
||||
|
||||
while let Ok((item, rest)) = self.inner_parser.parse(further_input.clone()) {
|
||||
results.push(item);
|
||||
further_input = rest;
|
||||
count += 1;
|
||||
if count >= at_most {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if count < at_least {
|
||||
return Err(input);
|
||||
}
|
||||
|
||||
Ok((results, further_input))
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
Representation::repeated(
|
||||
self.inner_parser.representation(),
|
||||
self.at_least.unwrap_or(0),
|
||||
self.at_most.unwrap_or(u16::MAX),
|
||||
)
|
||||
}
|
||||
}
|
||||
@ -1,84 +0,0 @@
|
||||
use crate::combinators::repeated::Repeated;
|
||||
use crate::parser::{BoxedParser, ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub struct SeparatedBy<'a, I, O>
|
||||
where
|
||||
I: ParserInput + Clone,
|
||||
{
|
||||
pub(super) inner_repeated: Repeated<'a, I, O>,
|
||||
pub(super) delimiter: BoxedParser<'a, I, (), I>,
|
||||
pub(super) allow_trailing: bool,
|
||||
}
|
||||
|
||||
impl<'a, I, O> Parser<I, Vec<O>, I> for SeparatedBy<'a, I, O>
|
||||
where
|
||||
I: ParserInput + Clone + 'a,
|
||||
{
|
||||
fn representation(&self) -> Representation {
|
||||
Representation::new("sepby")
|
||||
}
|
||||
|
||||
fn parse(&self, input: I) -> ParseResult<I, Vec<O>, I> {
|
||||
let at_least = self.inner_repeated.at_least.unwrap_or(0);
|
||||
let at_most = self.inner_repeated.at_most.unwrap_or(u16::MAX);
|
||||
let parser = &self.inner_repeated.inner_parser;
|
||||
let delimiter = &self.delimiter;
|
||||
|
||||
if at_most == 0 {
|
||||
return Ok((vec![], input));
|
||||
}
|
||||
|
||||
let mut results = Vec::new();
|
||||
let mut count: u16 = 0;
|
||||
let mut further_input;
|
||||
|
||||
match parser.parse(input.clone()) {
|
||||
Ok((item, rest)) => {
|
||||
results.push(item);
|
||||
further_input = rest;
|
||||
}
|
||||
Err(_e) => {
|
||||
if at_least > 0 {
|
||||
return Err(input);
|
||||
} else {
|
||||
return Ok((vec![], input));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
loop {
|
||||
match delimiter.parse(further_input.clone()) {
|
||||
Ok(((), rest)) => {
|
||||
further_input = rest;
|
||||
}
|
||||
Err(_e) => {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
match parser.parse(further_input.clone()) {
|
||||
Ok((item, rest)) => {
|
||||
results.push(item);
|
||||
further_input = rest;
|
||||
count += 1;
|
||||
}
|
||||
Err(_e) if self.allow_trailing => {
|
||||
break;
|
||||
}
|
||||
Err(e) => {
|
||||
return Err(e);
|
||||
}
|
||||
}
|
||||
|
||||
if count >= at_most {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if count < at_least {
|
||||
return Err(input);
|
||||
}
|
||||
|
||||
Ok((results, further_input))
|
||||
}
|
||||
}
|
||||
@ -1,7 +0,0 @@
|
||||
pub mod choice;
|
||||
pub mod combinators;
|
||||
mod parser;
|
||||
pub mod primitives;
|
||||
pub mod sequence;
|
||||
|
||||
pub use parser::{ParseResult, Parser, ParserInput, Representation};
|
||||
@ -1,38 +0,0 @@
|
||||
use crate::parser::{ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub struct BoxedParser<'a, I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
{
|
||||
inner: Box<dyn Parser<I, O, E> + 'a>,
|
||||
}
|
||||
|
||||
impl<'a, I, O, E> BoxedParser<'a, I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
{
|
||||
pub(crate) fn new<P>(inner: P) -> Self
|
||||
where
|
||||
P: Parser<I, O, E> + 'a,
|
||||
{
|
||||
BoxedParser {
|
||||
inner: Box::new(inner),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, I: ParserInput, O, E> Parser<I, O, E> for BoxedParser<'a, I, O, E> {
|
||||
fn representation(&self) -> Representation {
|
||||
self.inner.representation()
|
||||
}
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
self.inner.parse(input)
|
||||
}
|
||||
|
||||
fn boxed<'b>(self) -> BoxedParser<'b, I, O, E>
|
||||
where
|
||||
Self: Sized + 'b,
|
||||
{
|
||||
self
|
||||
}
|
||||
}
|
||||
@ -1,179 +0,0 @@
|
||||
mod boxed_parser;
|
||||
mod named_parser;
|
||||
mod parser_input;
|
||||
mod representation;
|
||||
|
||||
use std::rc::Rc;
|
||||
|
||||
pub use boxed_parser::BoxedParser;
|
||||
pub use named_parser::NamedParser;
|
||||
pub use parser_input::ParserInput;
|
||||
pub use representation::Representation;
|
||||
|
||||
pub type ParseResult<I, O, E> = Result<(O, I), E>;
|
||||
|
||||
pub trait Parser<I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E>;
|
||||
|
||||
fn representation(&self) -> Representation;
|
||||
|
||||
fn boxed<'a>(self) -> BoxedParser<'a, I, O, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
{
|
||||
BoxedParser::new(self)
|
||||
}
|
||||
|
||||
fn map<'a, F, O2>(self, map_fn: F) -> BoxedParser<'a, I, O2, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
E: 'a,
|
||||
O: 'a,
|
||||
O2: 'a,
|
||||
F: Fn(O) -> O2 + 'a,
|
||||
{
|
||||
crate::combinators::map(self, map_fn).boxed()
|
||||
}
|
||||
|
||||
fn to<'a, O2>(self, item: O2) -> BoxedParser<'a, I, O2, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O: 'a,
|
||||
O2: Clone + 'a,
|
||||
E: 'a,
|
||||
{
|
||||
self.map(move |_| item.clone())
|
||||
}
|
||||
|
||||
fn then<'a, P, O2>(self, next_parser: P) -> BoxedParser<'a, I, (O, O2), E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O: 'a,
|
||||
O2: 'a,
|
||||
E: 'a,
|
||||
P: Parser<I, O2, E> + 'a,
|
||||
{
|
||||
crate::sequence::tuple2(self, next_parser).boxed()
|
||||
}
|
||||
|
||||
fn ignore_then<'a, P, O2>(self, next_parser: P) -> BoxedParser<'a, I, O2, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O: 'a,
|
||||
O2: 'a,
|
||||
E: 'a,
|
||||
P: Parser<I, O2, E> + 'a,
|
||||
{
|
||||
crate::sequence::tuple2(self, next_parser).map(|(_, next_output)| next_output)
|
||||
}
|
||||
|
||||
fn then_ignore<'a, P, O2>(self, next_parser: P) -> BoxedParser<'a, I, O, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O: 'a,
|
||||
O2: 'a,
|
||||
E: 'a,
|
||||
P: Parser<I, O2, E> + 'a,
|
||||
{
|
||||
crate::sequence::tuple2(self, next_parser).map(|(this_output, _)| this_output)
|
||||
}
|
||||
|
||||
fn delimited<'a, P1, O1, P2, O2>(self, left: P1, right: P2) -> BoxedParser<'a, I, O, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O1: 'a,
|
||||
O2: 'a,
|
||||
O: 'a,
|
||||
E: 'a,
|
||||
P1: Parser<I, O1, E> + 'a,
|
||||
P2: Parser<I, O2, E> + 'a,
|
||||
{
|
||||
crate::sequence::seq((left, self, right)).map(|(_, output, _)| output)
|
||||
}
|
||||
|
||||
fn surrounded_by<'a, P, O1>(self, surrounding: P) -> BoxedParser<'a, I, O, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
O1: 'a,
|
||||
O: 'a,
|
||||
E: 'a,
|
||||
P: Parser<I, O1, E> + 'a,
|
||||
{
|
||||
BoxedParser::new(move |input| {
|
||||
let p1 = |i| surrounding.parse(i);
|
||||
let p2 = |i| surrounding.parse(i);
|
||||
let main = |i| self.parse(i);
|
||||
crate::sequence::seq((p1, main, p2))
|
||||
.map(|(_, output, _)| output)
|
||||
.parse(input)
|
||||
})
|
||||
}
|
||||
|
||||
fn optional<'a>(self) -> BoxedParser<'a, I, Option<O>, E>
|
||||
where
|
||||
I: Clone + 'a,
|
||||
O: 'a,
|
||||
E: 'a,
|
||||
Self: Sized + 'a,
|
||||
{
|
||||
crate::combinators::optional(self).boxed()
|
||||
}
|
||||
|
||||
fn named<'a>(self, parser_name: &str) -> NamedParser<'a, I, O, E>
|
||||
where
|
||||
Self: Sized + 'a,
|
||||
I: 'a,
|
||||
{
|
||||
NamedParser::new(self.boxed(), parser_name.to_string())
|
||||
}
|
||||
}
|
||||
|
||||
impl<I: ParserInput, O, E, F> Parser<I, O, E> for F
|
||||
where
|
||||
F: Fn(I) -> ParseResult<I, O, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
self(input)
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
Representation::new("NOT IMPL'D")
|
||||
}
|
||||
}
|
||||
|
||||
impl<I: ParserInput, O, E, F> Parser<I, O, E> for (F, Representation)
|
||||
where
|
||||
F: Fn(I) -> ParseResult<I, O, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
self.0(input)
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
self.1.clone()
|
||||
}
|
||||
}
|
||||
|
||||
impl<I, O, E, T> Parser<I, O, E> for Rc<T>
|
||||
where
|
||||
I: ParserInput,
|
||||
T: Parser<I, O, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
self.as_ref().parse(input)
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
self.as_ref().representation()
|
||||
}
|
||||
}
|
||||
@ -1,36 +0,0 @@
|
||||
use super::boxed_parser::BoxedParser;
|
||||
use crate::parser::{ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub struct NamedParser<'a, I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
{
|
||||
inner_parser: BoxedParser<'a, I, O, E>,
|
||||
name: String,
|
||||
}
|
||||
|
||||
impl<'a, I, O, E> NamedParser<'a, I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
{
|
||||
pub(super) fn new(inner_parser: BoxedParser<'a, I, O, E>, name: String) -> Self
|
||||
where
|
||||
I: 'a,
|
||||
{
|
||||
NamedParser { inner_parser, name }
|
||||
}
|
||||
|
||||
pub fn get_name(&'a self) -> &'a str {
|
||||
self.name.as_ref()
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, I: ParserInput, O, E> Parser<I, O, E> for NamedParser<'a, I, O, E> {
|
||||
fn representation(&self) -> Representation {
|
||||
self.inner_parser.representation()
|
||||
}
|
||||
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E> {
|
||||
self.inner_parser.parse(input)
|
||||
}
|
||||
}
|
||||
@ -1,11 +0,0 @@
|
||||
pub trait ParserInput: std::fmt::Debug {
|
||||
type Output;
|
||||
fn next_token() -> Self::Output;
|
||||
}
|
||||
|
||||
impl ParserInput for &str {
|
||||
type Output = ();
|
||||
fn next_token() -> Self::Output {
|
||||
()
|
||||
}
|
||||
}
|
||||
@ -1,66 +0,0 @@
|
||||
#[derive(Debug, Clone, PartialEq)]
|
||||
pub struct Representation {
|
||||
val: String,
|
||||
}
|
||||
|
||||
impl Representation {
|
||||
pub fn new(from: &str) -> Self {
|
||||
Self {
|
||||
val: from.to_string(),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn from_choice(
|
||||
choice_parser_reps: &mut impl Iterator<Item = Representation>,
|
||||
) -> Self {
|
||||
let mut buf = String::new();
|
||||
let mut iter = choice_parser_reps.peekable();
|
||||
loop {
|
||||
let rep = match iter.next() {
|
||||
Some(r) => r,
|
||||
None => break,
|
||||
};
|
||||
buf.push_str(&rep.val);
|
||||
match iter.peek() {
|
||||
Some(_) => {
|
||||
buf.push_str(" | ");
|
||||
}
|
||||
None => {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Representation::new(&buf)
|
||||
}
|
||||
|
||||
pub(crate) fn from_sequence(
|
||||
sequence_representations: &mut impl Iterator<Item = Representation>,
|
||||
) -> Self {
|
||||
let mut buf = String::new();
|
||||
let mut iter = sequence_representations.peekable();
|
||||
loop {
|
||||
let rep = match iter.next() {
|
||||
Some(r) => r,
|
||||
None => break,
|
||||
};
|
||||
buf.push_str(&rep.val);
|
||||
match iter.peek() {
|
||||
Some(_) => {
|
||||
buf.push_str(" ");
|
||||
}
|
||||
None => {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Representation::new(&buf)
|
||||
}
|
||||
|
||||
// TODO use at_least, at_most
|
||||
pub(crate) fn repeated(underlying: Representation, at_least: u16, _at_most: u16) -> Self {
|
||||
let sigil = if at_least == 0 { "*" } else { "+" };
|
||||
Representation::new(&format!("({}){}", underlying.val, sigil))
|
||||
}
|
||||
}
|
||||
@ -1,108 +0,0 @@
|
||||
use crate::parser::{ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub fn literal_char(expected: char) -> impl Fn(&str) -> ParseResult<&str, char, &str> {
|
||||
move |input| match input.chars().next() {
|
||||
Some(ch) if ch == expected => Ok((expected, &input[ch.len_utf8()..])),
|
||||
_ => Err(input),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn literal<'a>(expected: &'static str) -> impl Parser<&'a str, &'a str, &'a str> {
|
||||
println!("literal call expected: {}", expected);
|
||||
let rep = Representation::new(expected);
|
||||
let p = move |input: &'a str| match input.get(0..expected.len()) {
|
||||
Some(next) if next == expected => Ok((expected, &input[expected.len()..])),
|
||||
_ => Err(input),
|
||||
};
|
||||
(p, rep)
|
||||
}
|
||||
|
||||
pub fn any_char(input: &str) -> ParseResult<&str, char, &str> {
|
||||
match input.chars().next() {
|
||||
Some(ch) => Ok((ch, &input[ch.len_utf8()..])),
|
||||
None => Err(input),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn one_of<'a>(items: &'static str) -> impl Parser<&'a str, &'a str, &'a str> {
|
||||
let p = move |input: &'a str| {
|
||||
if let Some(ch) = input.chars().next() {
|
||||
if items.contains(ch) {
|
||||
let (first, rest) = input.split_at(1);
|
||||
return Ok((first, rest));
|
||||
}
|
||||
}
|
||||
Err(input)
|
||||
};
|
||||
|
||||
let mut s = String::new();
|
||||
for ch in items.chars() {
|
||||
s.push(ch);
|
||||
s.push_str(" | ");
|
||||
}
|
||||
let rep = Representation::new(&s);
|
||||
(p, rep)
|
||||
}
|
||||
|
||||
pub fn pred<P, F, I, O>(parser: P, pred_fn: F) -> impl Parser<I, O, I>
|
||||
where
|
||||
I: ParserInput,
|
||||
P: Parser<I, O, I>,
|
||||
F: Fn(&O) -> bool,
|
||||
{
|
||||
let orig_rep = parser.representation();
|
||||
(
|
||||
move |input| {
|
||||
parser.parse(input).and_then(|(result, rest)| {
|
||||
if pred_fn(&result) {
|
||||
Ok((result, rest))
|
||||
} else {
|
||||
Err(rest)
|
||||
}
|
||||
})
|
||||
},
|
||||
Representation::new(&format!("{:?} if <PREDICATE>", orig_rep)),
|
||||
)
|
||||
}
|
||||
|
||||
/// Parses a standard identifier in a programming language
|
||||
pub fn identifier(input: &str) -> ParseResult<&str, String, &str> {
|
||||
let mut chars = input.chars();
|
||||
let mut buf = String::new();
|
||||
|
||||
match chars.next() {
|
||||
Some(ch) if ch.is_alphabetic() => buf.push(ch),
|
||||
_ => return Err(input),
|
||||
}
|
||||
|
||||
for next in chars {
|
||||
if next.is_alphanumeric() {
|
||||
buf.push(next);
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
let next_index = buf.len();
|
||||
Ok((buf, &input[next_index..]))
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_identifier() {
|
||||
assert_eq!(
|
||||
identifier("bongo1beans").unwrap(),
|
||||
(("bongo1beans".to_string(), ""))
|
||||
);
|
||||
assert_eq!(identifier("2bongo1beans"), Err("2bongo1beans"));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_pred() {
|
||||
let p = pred(any_char, |c| *c == 'f');
|
||||
assert_eq!(p.parse("frog"), Ok(('f', "rog")));
|
||||
}
|
||||
}
|
||||
@ -1,195 +0,0 @@
|
||||
use crate::parser::{ParseResult, Parser, ParserInput, Representation};
|
||||
|
||||
pub fn tuple2<P1, P2, I, O1, O2, E>(parser1: P1, parser2: P2) -> impl Parser<I, (O1, O2), E>
|
||||
where
|
||||
I: ParserInput,
|
||||
P1: Parser<I, O1, E>,
|
||||
P2: Parser<I, O2, E>,
|
||||
{
|
||||
seq((parser1, parser2))
|
||||
}
|
||||
|
||||
pub fn seq<T, I, O, E>(sequence: T) -> impl Parser<I, O, E>
|
||||
where
|
||||
I: ParserInput,
|
||||
T: Sequence<I, O, E>,
|
||||
{
|
||||
let rep = sequence.representation();
|
||||
let p = move |input| sequence.parse(input);
|
||||
(p, rep)
|
||||
}
|
||||
|
||||
/* TODO - eventually rewrite this parser combinator in Schala. Seeing what this
|
||||
* code that makes heavy use of type variables and abstraction over types looks like
|
||||
* in Schala's type system should be educational
|
||||
*/
|
||||
|
||||
pub trait Sequence<I, O, E> {
|
||||
fn parse(&self, input: I) -> ParseResult<I, O, E>;
|
||||
fn representation(&self) -> Representation;
|
||||
}
|
||||
|
||||
impl<I, O1, O2, E, P1, P2> Sequence<I, (O1, O2), E> for (P1, P2)
|
||||
where
|
||||
I: ParserInput,
|
||||
P1: Parser<I, O1, E>,
|
||||
P2: Parser<I, O2, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, (O1, O2), E> {
|
||||
let parser1 = &self.0;
|
||||
let parser2 = &self.1;
|
||||
parser1.parse(input).and_then(|(result1, rest1)| {
|
||||
parser2
|
||||
.parse(rest1)
|
||||
.map(|(result2, rest2)| ((result1, result2), rest2))
|
||||
})
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
let mut iter = [self.0.representation(), self.1.representation()].into_iter();
|
||||
Representation::from_sequence(&mut iter)
|
||||
}
|
||||
}
|
||||
|
||||
impl<I, O1, O2, O3, E, P1, P2, P3> Sequence<I, (O1, O2, O3), E> for (P1, P2, P3)
|
||||
where
|
||||
I: ParserInput,
|
||||
P1: Parser<I, O1, E>,
|
||||
P2: Parser<I, O2, E>,
|
||||
P3: Parser<I, O3, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, (O1, O2, O3), E> {
|
||||
let parser1 = &self.0;
|
||||
let parser2 = &self.1;
|
||||
let parser3 = &self.2;
|
||||
|
||||
let (result1, rest1) = parser1.parse(input)?;
|
||||
let (result2, rest2) = parser2.parse(rest1)?;
|
||||
let (result3, rest3) = parser3.parse(rest2)?;
|
||||
|
||||
Ok(((result1, result2, result3), rest3))
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
let mut iter = [
|
||||
self.0.representation(),
|
||||
self.1.representation(),
|
||||
self.2.representation(),
|
||||
]
|
||||
.into_iter();
|
||||
Representation::from_sequence(&mut iter)
|
||||
}
|
||||
}
|
||||
|
||||
impl<I, O1, O2, O3, O4, E, P1, P2, P3, P4> Sequence<I, (O1, O2, O3, O4), E> for (P1, P2, P3, P4)
|
||||
where
|
||||
I: ParserInput,
|
||||
P1: Parser<I, O1, E>,
|
||||
P2: Parser<I, O2, E>,
|
||||
P3: Parser<I, O3, E>,
|
||||
P4: Parser<I, O4, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, (O1, O2, O3, O4), E> {
|
||||
let parser1 = &self.0;
|
||||
let parser2 = &self.1;
|
||||
let parser3 = &self.2;
|
||||
let parser4 = &self.3;
|
||||
|
||||
let (result1, rest1) = parser1.parse(input)?;
|
||||
let (result2, rest2) = parser2.parse(rest1)?;
|
||||
let (result3, rest3) = parser3.parse(rest2)?;
|
||||
let (result4, rest4) = parser4.parse(rest3)?;
|
||||
|
||||
Ok(((result1, result2, result3, result4), rest4))
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
let mut iter = [
|
||||
self.0.representation(),
|
||||
self.1.representation(),
|
||||
self.2.representation(),
|
||||
self.3.representation(),
|
||||
]
|
||||
.into_iter();
|
||||
Representation::from_sequence(&mut iter)
|
||||
}
|
||||
}
|
||||
|
||||
impl<I, O1, O2, O3, O4, O5, E, P1, P2, P3, P4, P5> Sequence<I, (O1, O2, O3, O4, O5), E>
|
||||
for (P1, P2, P3, P4, P5)
|
||||
where
|
||||
I: ParserInput,
|
||||
P1: Parser<I, O1, E>,
|
||||
P2: Parser<I, O2, E>,
|
||||
P3: Parser<I, O3, E>,
|
||||
P4: Parser<I, O4, E>,
|
||||
P5: Parser<I, O5, E>,
|
||||
{
|
||||
fn parse(&self, input: I) -> ParseResult<I, (O1, O2, O3, O4, O5), E> {
|
||||
let parser1 = &self.0;
|
||||
let parser2 = &self.1;
|
||||
let parser3 = &self.2;
|
||||
let parser4 = &self.3;
|
||||
let parser5 = &self.4;
|
||||
|
||||
let (result1, rest1) = parser1.parse(input)?;
|
||||
let (result2, rest2) = parser2.parse(rest1)?;
|
||||
let (result3, rest3) = parser3.parse(rest2)?;
|
||||
let (result4, rest4) = parser4.parse(rest3)?;
|
||||
let (result5, rest5) = parser5.parse(rest4)?;
|
||||
|
||||
Ok(((result1, result2, result3, result4, result5), rest5))
|
||||
}
|
||||
|
||||
fn representation(&self) -> Representation {
|
||||
let mut iter = [
|
||||
self.0.representation(),
|
||||
self.1.representation(),
|
||||
self.2.representation(),
|
||||
self.3.representation(),
|
||||
self.4.representation(),
|
||||
]
|
||||
.into_iter();
|
||||
Representation::from_sequence(&mut iter)
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use super::*;
|
||||
use crate::combinators::repeated;
|
||||
use crate::primitives::{identifier, literal};
|
||||
|
||||
#[test]
|
||||
fn test_tuple2() {
|
||||
let p = tuple2(identifier, tuple2(literal(" "), literal("ruts")));
|
||||
let (output, _rest) = p.parse("fort1 ruts").unwrap();
|
||||
assert_eq!(output, ("fort1".into(), (" ", "ruts")));
|
||||
|
||||
let p = identifier.then(literal(" ")).then(literal("ruts"));
|
||||
let (output, _rest) = p.parse("fort1 ruts").unwrap();
|
||||
assert_eq!(output, (("fort1".into(), " "), "ruts"));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_seq() {
|
||||
let p = seq((
|
||||
literal("bong").to(10),
|
||||
repeated(literal(" ")).to(()),
|
||||
literal("hits").to(20),
|
||||
));
|
||||
assert_eq!(p.parse("bong hits").unwrap(), ((10, (), 20), ""));
|
||||
|
||||
let p = seq((
|
||||
literal("alpha").to(10),
|
||||
repeated(literal(" ")).to(()),
|
||||
repeated(literal("-")).to(()),
|
||||
repeated(literal(" ")),
|
||||
literal("beta"),
|
||||
));
|
||||
assert_eq!(
|
||||
p.parse("alpha ------ beta gamma").unwrap(),
|
||||
((10, (), (), vec![" ", " ", " "], "beta"), " gamma")
|
||||
);
|
||||
}
|
||||
}
|
||||
@ -1,49 +0,0 @@
|
||||
{
|
||||
"$schema": "https://joplinapp.org/schema/settings.json",
|
||||
"locale": "en_GB",
|
||||
"sync.target": 6,
|
||||
"markdown.plugin.softbreaks": false,
|
||||
"markdown.plugin.typographer": false,
|
||||
"spellChecker.language": "en-US",
|
||||
"ui.layout": {
|
||||
"key": "root",
|
||||
"children": [
|
||||
{
|
||||
"key": "sideBar",
|
||||
"width": 250,
|
||||
"visible": true
|
||||
},
|
||||
{
|
||||
"key": "noteList",
|
||||
"width": 250,
|
||||
"visible": true
|
||||
},
|
||||
{
|
||||
"key": "editor",
|
||||
"visible": true,
|
||||
"width": 1493
|
||||
},
|
||||
{
|
||||
"key": "plugin-view-joplin.plugin.note.tabs-note.tabs.panel",
|
||||
"context": {
|
||||
"pluginId": "joplin.plugin.note.tabs"
|
||||
},
|
||||
"visible": true
|
||||
}
|
||||
],
|
||||
"visible": true
|
||||
},
|
||||
"noteVisiblePanes": [
|
||||
"editor",
|
||||
"viewer"
|
||||
],
|
||||
"theme": 4,
|
||||
"sync.6.username": "webdav",
|
||||
"net.ignoreTlsErrors": true,
|
||||
"style.editor.contentMaxWidth": 600,
|
||||
"editor.codeView": true,
|
||||
"markdown.plugin.sub": true,
|
||||
"markdown.plugin.sup": true,
|
||||
"markdown.plugin.multitable": true
|
||||
}
|
||||
|
||||
@ -1,248 +0,0 @@
|
||||
use parser_combinator::choice::choice;
|
||||
use parser_combinator::combinators::repeated;
|
||||
use parser_combinator::primitives::{any_char, literal, literal_char, one_of, pred};
|
||||
use parser_combinator::sequence::seq;
|
||||
use parser_combinator::Parser;
|
||||
use parser_combinator::Representation;
|
||||
|
||||
use proptest::prelude::*;
|
||||
|
||||
use rstest::*;
|
||||
|
||||
proptest! {
|
||||
#[test]
|
||||
fn doesnt_crash(s in "\\PC*") {
|
||||
let _output = json_object().parse(&s);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_string(s in r#"[^"]+"#) {
|
||||
let input = format!("\"{}\"", s);
|
||||
let output = json_string().parse(&input).unwrap();
|
||||
match output {
|
||||
(JsonValue::Str(output_s), "") if output_s == s => (),
|
||||
_ => panic!(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parsing() {
|
||||
let output = literal("a").parse("a yolo");
|
||||
assert_eq!(output.unwrap(), ("a", " yolo"));
|
||||
}
|
||||
|
||||
/*
|
||||
* JSON BNF
|
||||
* <JSON> ::= <value>
|
||||
<value> ::= <object> | <array> | <boolean> | <string> | <number> | <null>
|
||||
<array> ::= "[" [<value>] {"," <value>}* "]"
|
||||
<object> ::= "{" [<property>] {"," <property>}* "}"
|
||||
<property> ::= <string> ":" <value>
|
||||
*/
|
||||
#[derive(Debug, Clone, PartialEq)]
|
||||
enum JsonValue {
|
||||
Null,
|
||||
Bool(bool),
|
||||
Str(String),
|
||||
Num(f64),
|
||||
Array(Vec<JsonValue>),
|
||||
Object(Vec<(String, JsonValue)>),
|
||||
}
|
||||
|
||||
trait JsonParser<'a, T>: Parser<&'a str, T, &'a str> {}
|
||||
impl<'a, T, P> JsonParser<'a, T> for P where P: Parser<&'a str, T, &'a str> {}
|
||||
|
||||
fn json_null<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
literal("null").to(JsonValue::Null)
|
||||
}
|
||||
|
||||
fn json_bool<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
choice((
|
||||
literal("true").to(JsonValue::Bool(true)),
|
||||
literal("false").to(JsonValue::Bool(false)),
|
||||
))
|
||||
}
|
||||
|
||||
fn json_number<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
fn digit<'a>() -> impl JsonParser<'a, &'a str> {
|
||||
one_of("1234567890")
|
||||
}
|
||||
|
||||
fn digits<'a>() -> impl JsonParser<'a, Vec<&'a str>> {
|
||||
repeated(digit()).at_least(1)
|
||||
}
|
||||
|
||||
let json_number_inner = choice((
|
||||
seq((digits(), literal(".").ignore_then(digits()).optional())).map(
|
||||
|(mut digits, maybe_decimal)| {
|
||||
if let Some(decimal_digits) = maybe_decimal {
|
||||
digits.push(".");
|
||||
digits.extend(decimal_digits.into_iter());
|
||||
}
|
||||
digits.into_iter().collect::<String>()
|
||||
},
|
||||
),
|
||||
literal(".").ignore_then(digits()).map(|decimal_digits| {
|
||||
let mut d = vec!["."];
|
||||
d.extend(decimal_digits.into_iter());
|
||||
d.into_iter().collect::<String>()
|
||||
}),
|
||||
))
|
||||
.map(|digits| digits.parse::<f64>().unwrap());
|
||||
|
||||
literal("-")
|
||||
.optional()
|
||||
.then(json_number_inner)
|
||||
.map(|(maybe_sign, mut val)| {
|
||||
if maybe_sign.is_some() {
|
||||
val *= -1.0;
|
||||
}
|
||||
JsonValue::Num(val)
|
||||
})
|
||||
}
|
||||
|
||||
fn json_string_raw<'a>() -> impl JsonParser<'a, String> {
|
||||
seq((
|
||||
literal_char('"'),
|
||||
repeated(pred(any_char, |ch| *ch != '"')),
|
||||
literal_char('"'),
|
||||
))
|
||||
.map(|(_, s, _)| s.iter().cloned().collect::<String>())
|
||||
}
|
||||
|
||||
fn json_string<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
json_string_raw().map(JsonValue::Str)
|
||||
}
|
||||
|
||||
fn whitespace<'a>() -> impl JsonParser<'a, ()> {
|
||||
repeated(choice((
|
||||
literal_char('\t'),
|
||||
literal_char('\n'),
|
||||
literal_char(' '),
|
||||
)))
|
||||
.to(())
|
||||
}
|
||||
|
||||
fn json_array<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
move |input| {
|
||||
let val = json_value().surrounded_by(whitespace());
|
||||
|
||||
repeated(val)
|
||||
.separated_by(literal(","), false)
|
||||
.delimited(literal_char('['), literal_char(']'))
|
||||
.map(JsonValue::Array)
|
||||
.parse(input)
|
||||
}
|
||||
}
|
||||
|
||||
fn json_object<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
move |input| {
|
||||
let kv = json_string_raw()
|
||||
.surrounded_by(whitespace())
|
||||
.then_ignore(literal_char(':'))
|
||||
.then(json_value().surrounded_by(whitespace()));
|
||||
|
||||
repeated(kv)
|
||||
.separated_by(literal_char(','), false)
|
||||
.delimited(literal_char('{'), literal_char('}'))
|
||||
.map(JsonValue::Object)
|
||||
.parse(input)
|
||||
}
|
||||
}
|
||||
|
||||
fn json_value<'a>() -> impl JsonParser<'a, JsonValue> {
|
||||
choice((
|
||||
json_null(),
|
||||
json_bool(),
|
||||
json_number(),
|
||||
json_string(),
|
||||
json_array(),
|
||||
json_object(),
|
||||
))
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_json_primitives() {
|
||||
assert_eq!(
|
||||
json_string().parse(r#""yolo swagg""#).unwrap(),
|
||||
(JsonValue::Str("yolo swagg".into()), "")
|
||||
);
|
||||
|
||||
assert_eq!(
|
||||
json_number().parse("-383").unwrap().0,
|
||||
JsonValue::Num(-383f64)
|
||||
);
|
||||
assert_eq!(
|
||||
json_number().parse("-.383").unwrap().0,
|
||||
JsonValue::Num(-0.383)
|
||||
);
|
||||
assert_eq!(
|
||||
json_number().parse(".383").unwrap().0,
|
||||
JsonValue::Num(0.383)
|
||||
);
|
||||
assert_eq!(
|
||||
json_number().parse("-1.383").unwrap().0,
|
||||
JsonValue::Num(-1.383)
|
||||
);
|
||||
}
|
||||
|
||||
#[rstest]
|
||||
#[case(r#"[ 4, 9, "ara",]"#)]
|
||||
fn parse_json_array_err(#[case] input: &str) {
|
||||
assert!(json_array().parse(input).is_err());
|
||||
}
|
||||
|
||||
#[rstest]
|
||||
#[case("[[],[]]", (JsonValue::Array(vec![JsonValue::Array(vec![]), JsonValue::Array(vec![])]), ""))]
|
||||
#[case(r#"[ 4, 9, "foo" ]"#, (
|
||||
JsonValue::Array(vec![
|
||||
JsonValue::Num(4.),
|
||||
JsonValue::Num(9.0),
|
||||
JsonValue::Str("foo".to_string())
|
||||
]),
|
||||
""
|
||||
))]
|
||||
#[case(r#"[8,null,[],5],{}"#,
|
||||
(
|
||||
JsonValue::Array(vec![
|
||||
JsonValue::Num(8.),
|
||||
JsonValue::Null,
|
||||
JsonValue::Array(vec![]),
|
||||
JsonValue::Num(5.),
|
||||
]),
|
||||
",{}"
|
||||
))]
|
||||
fn parse_json_array(#[case] input: &str, #[case] expected: (JsonValue, &str)) {
|
||||
assert_eq!(json_array().parse(input).unwrap(), expected);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_json_object() {
|
||||
assert_eq!(
|
||||
json_object().parse(r#"{ "a": 23}"#).unwrap().0,
|
||||
JsonValue::Object(vec![("a".into(), JsonValue::Num(23.))])
|
||||
);
|
||||
assert_eq!(
|
||||
json_object().parse(r#"{}"#).unwrap().0,
|
||||
JsonValue::Object(vec![])
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_json_document() {
|
||||
let test_json = include_str!("joplin-cfg.json");
|
||||
let parsed_json = json_object().parse(test_json);
|
||||
assert!(parsed_json.is_ok());
|
||||
}
|
||||
|
||||
#[rstest]
|
||||
#[case(json_null().representation(), Representation::new("null"))]
|
||||
#[case(json_bool().representation(), Representation::new("true | false"))]
|
||||
#[case(json_number().representation(), Representation::new("- | ε (1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | )+ . (1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | )+ | ε | . (1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | )+"))]
|
||||
fn representations_test(
|
||||
#[case] parser_representation: Representation,
|
||||
#[case] expected: Representation,
|
||||
) {
|
||||
assert_eq!(parser_representation, expected);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user