79 lines
3.1 KiB
Rust
79 lines
3.1 KiB
Rust
use nom::branch::alt;
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use nom::combinator::eof;
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use nom::combinator::recognize;
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use nom::combinator::verify;
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use nom::multi::many1;
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use nom::multi::many_till;
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use nom::sequence::tuple;
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use super::lesser_element::Paragraph;
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use super::util::blank_line;
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use super::util::get_consumed;
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use super::Context;
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use crate::error::Res;
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use crate::parser::element_parser::element;
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use crate::parser::exiting::ExitClass;
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use crate::parser::object_parser::standard_set_object;
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use crate::parser::parser_context::ContextElement;
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use crate::parser::parser_context::ExitMatcherNode;
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use crate::parser::parser_with_context::parser_with_context;
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use crate::parser::util::exit_matcher_parser;
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use crate::parser::util::start_of_line;
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#[tracing::instrument(ret, level = "debug")]
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pub fn paragraph<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, Paragraph<'s>> {
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let parser_context =
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context.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Beta,
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exit_matcher: ¶graph_end,
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}));
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let standard_set_object_matcher = parser_with_context!(standard_set_object)(&parser_context);
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let exit_matcher = parser_with_context!(exit_matcher_parser)(&parser_context);
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let (remaining, (children, _exit_contents)) = verify(
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many_till(standard_set_object_matcher, exit_matcher),
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|(children, _exit_contents)| !children.is_empty(),
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)(input)?;
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// Not checking parent exit matcher because if there are any children matched then we have a valid paragraph.
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let source = get_consumed(input, remaining);
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Ok((remaining, Paragraph { source, children }))
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}
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#[tracing::instrument(ret, level = "debug")]
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fn paragraph_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
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let non_paragraph_element_matcher = parser_with_context!(element(false))(context);
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let start_of_line_matcher = parser_with_context!(start_of_line)(&context);
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alt((
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recognize(tuple((start_of_line_matcher, many1(blank_line)))),
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recognize(non_paragraph_element_matcher),
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eof,
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))(input)
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}
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#[cfg(test)]
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mod tests {
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use crate::parser::element_parser::element;
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use crate::parser::parser_context::ContextElement;
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use crate::parser::parser_context::ContextTree;
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use crate::parser::parser_with_context::parser_with_context;
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use crate::parser::source::Source;
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#[test]
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fn two_paragraphs() {
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let input = "foo bar baz\n\nlorem ipsum";
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let initial_context: ContextTree<'_, '_> = ContextTree::new();
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let document_context =
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initial_context.with_additional_node(ContextElement::DocumentRoot(input));
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let paragraph_matcher = parser_with_context!(element(true))(&document_context);
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let (remaining, first_paragraph) = paragraph_matcher(input).expect("Parse first paragraph");
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let (remaining, second_paragraph) =
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paragraph_matcher(remaining).expect("Parse second paragraph.");
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assert_eq!(remaining, "");
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assert_eq!(first_paragraph.get_source(), "foo bar baz\n\n");
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assert_eq!(second_paragraph.get_source(), "lorem ipsum");
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}
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}
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