59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
use nom::bytes::complete::tag;
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use nom::character::complete::line_ending;
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use nom::character::complete::one_of;
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use nom::combinator::recognize;
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use nom::multi::many0;
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use super::org_source::OrgSource;
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use crate::context::RefContext;
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use crate::error::CustomError;
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use crate::error::MyError;
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use crate::error::Res;
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use crate::parser::util::get_consumed;
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use crate::types::LineBreak;
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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pub(crate) fn line_break<'b, 'g, 'r, 's>(
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context: RefContext<'b, 'g, 'r, 's>,
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input: OrgSource<'s>,
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) -> Res<OrgSource<'s>, LineBreak<'s>> {
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let (remaining, _) = pre(context, input)?;
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let (remaining, _) = tag(r#"\\"#)(remaining)?;
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let (remaining, _) = recognize(many0(one_of(" \t")))(remaining)?;
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let (remaining, _) = line_ending(remaining)?;
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let source = get_consumed(input, remaining);
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Ok((
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remaining,
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LineBreak {
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source: source.into(),
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},
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))
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn pre<'b, 'g, 'r, 's>(
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_context: RefContext<'b, 'g, 'r, 's>,
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input: OrgSource<'s>,
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) -> Res<OrgSource<'s>, ()> {
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let preceding_character = input.get_preceding_character();
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match preceding_character {
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// If None, we are at the start of the file
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None | Some('\\') => {
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return Err(nom::Err::Error(CustomError::MyError(MyError(
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"Not a valid pre character for line break.".into(),
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))));
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}
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_ => {}
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};
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let current_line = input.text_since_line_break();
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let is_non_empty_line = current_line.chars().any(|c| !c.is_whitespace());
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if !is_non_empty_line {
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return Err(nom::Err::Error(CustomError::MyError(MyError(
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"Not a valid pre line for line break.".into(),
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))));
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}
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Ok((input, ()))
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}
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