malachi 0.9.8

A domain specific pattern matching language made for defining bot commands.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

// SPDX-License-Identifier: Apache-2.0
// Copyright 2024 Taylan Gökkaya

// This file is licensed under the terms of Apache-2.0 License.

use nom::Finish;

use super::{
	capture::{
		parse_capture,
		parse_group,
		parse_priority_group,
	},
	literal::parse_literal,
	prelude::*,
	Segment,
	SyntaxError,
};

pub fn parse_segment(input: &'_ str) -> IResult<&'_ str, Segment<'_>> {
	alt((
		// First try parsing a priority group  `[]`.
		map(parse_priority_group, Segment::PriorityGroup),
		// Or a normal group `{}`.
		map(parse_group, Segment::Group),
		// Or a single capture `<>`.
		map(parse_capture, Segment::Capture),
		// If all fails, it's a literal.
		map(parse_literal, Segment::Text),
	))(input)
}

fn parse_cmd(input: &'_ str) -> IResult<&'_ str, Vec<Segment<'_>>> {
	many0(wrap_space0(parse_segment))(input)
}

pub fn parse_command(input: &'_ str) -> Result<Vec<Segment<'_>>, SyntaxError> {
	parse_cmd(input)
		.finish()
		.map_err(|e| SyntaxError::from_nom(e, input))
		.map(|tup| tup.1)
}