pddl 0.2.0

A PDDL 3.1 parser, strongly typed
Documentation 
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//! Provides parsers for goal object declarations.

use nom::combinator::map;
use nom::Parser;

use crate::parsers::{parse_name, prefix_expr, typed_list, ParseResult, Span};
use crate::types::Objects;

/// Parser for goal object declarations.
///
/// ## Example
/// ```
/// # use pddl::parsers::{parse_problem_objects_declaration, preamble::*};
/// # use pddl::{Name, Objects, ToTyped, Type};
/// let input = "(:objects train1 train2)";
/// assert!(parse_problem_objects_declaration(input).is_value(
///     Objects::new([
///         Name::new("train1").to_typed(Type::OBJECT),
///         Name::new("train2").to_typed(Type::OBJECT),
///     ])
/// ));
/// ```
pub fn parse_problem_objects_declaration<'a, T: Into<Span<'a>>>(
    input: T,
) -> ParseResult<'a, Objects> {
    map(
        prefix_expr(":objects", typed_list(parse_name)),
        Objects::new,
    )
    .parse(input.into())
}

impl crate::parsers::Parser for Objects {
    type Item = Objects;

    /// See [`parse_problem_objects_declaration`].
    fn parse<'a, S: Into<Span<'a>>>(input: S) -> ParseResult<'a, Self::Item> {
        parse_problem_objects_declaration(input)
    }
}

#[cfg(test)]
mod test {
    use crate::parsers::UnwrapValue;
    use crate::{Name, Parser, ToTyped, Type};

    use super::*;

    #[test]
    fn test_parse() {
        let input = "(:objects train1 train2)";
        assert!(Objects::parse(input).is_value(Objects::new([
            Name::new("train1").to_typed(Type::OBJECT),
            Name::new("train2").to_typed(Type::OBJECT),
        ])));
    }
}