Move parsers for specific objects/elements to their own files.

The parsers are the most complicated part, so I want them in their own files. I am uncertain if I want to move their corresponding structs or just the parsers.

src/parser/paragraph.rs

@@ -0,0 +1,40 @@
+use nom::branch::alt;
+use nom::character::complete::line_ending;
+use nom::combinator::eof;
+use nom::combinator::recognize;
+use nom::multi::many1;
+use nom::sequence::tuple;
+
+use crate::parser::object::standard_set_object;
+use crate::parser::parser_context::ChainBehavior;
+use crate::parser::parser_context::ContextElement;
+use crate::parser::parser_context::ExitMatcherNode;
+use crate::parser::parser_with_context::parser_with_context;
+
+use super::error::Res;
+use super::lesser_element::Paragraph;
+use super::util::blank_line;
+use super::util::get_consumed;
+use super::util::trailing_whitespace;
+use super::Context;
+
+pub fn paragraph<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, Paragraph<'s>> {
+    let parser_context =
+        context.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
+            exit_matcher: ChainBehavior::AndParent(Some(&paragraph_end)),
+        }));
+    let standard_set_object_matcher = parser_with_context!(standard_set_object)(&parser_context);
+
+    let (remaining, children) = many1(standard_set_object_matcher)(input)?;
+
+    let (remaining, _trailing_whitespace) = trailing_whitespace(remaining)?;
+
+    let source = get_consumed(input, remaining);
+
+    Ok((remaining, Paragraph { source, children }))
+}
+
+fn paragraph_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    // TODO: Other elements should also end paragraphs
+    alt((recognize(tuple((line_ending, many1(blank_line)))), eof))(input)
+}