organic/src/parser/element.rs

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use super::error::Res;
use super::greater_block::greater_block;
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use super::greater_element::GreaterBlock;
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use super::greater_element::PlainList;
use super::lesser_element::Paragraph;
use super::paragraph::paragraph;
use super::plain_list::plain_list;
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use super::source::Source;
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use super::Context;
use crate::parser::parser_with_context::parser_with_context;
use nom::branch::alt;
use nom::combinator::map;
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#[derive(Debug)]
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pub enum Element<'s> {
Paragraph(Paragraph<'s>),
PlainList(PlainList<'s>),
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GreaterBlock(GreaterBlock<'s>),
/// The whitespace that follows an element.
///
/// This isn't a real org-mode element. Except for items in plain lists, trailing blank lines belong to the preceding element. It is a separate `Element` in this enum to make parsing easier.
TrailingWhitespace(&'s str),
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}
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impl<'s> Source<'s> for Element<'s> {
fn get_source(&'s self) -> &'s str {
match self {
Element::Paragraph(obj) => obj.source,
Element::PlainList(obj) => obj.source,
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Element::GreaterBlock(obj) => obj.source,
Element::TrailingWhitespace(src) => src,
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}
}
}
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#[tracing::instrument(ret, level = "debug")]
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pub fn element<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, Element<'s>> {
let non_paragraph_matcher = parser_with_context!(non_paragraph_element)(context);
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let paragraph_matcher = parser_with_context!(paragraph)(context);
alt((
non_paragraph_matcher,
map(paragraph_matcher, Element::Paragraph),
))(input)
}
pub fn non_paragraph_element<'r, 's>(
context: Context<'r, 's>,
input: &'s str,
) -> Res<&'s str, Element<'s>> {
let plain_list_matcher = parser_with_context!(plain_list)(context);
let greater_block_matcher = parser_with_context!(greater_block)(context);
alt((
map(plain_list_matcher, Element::PlainList),
map(greater_block_matcher, Element::GreaterBlock),
))(input)
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}