73 lines
2.3 KiB
Rust
73 lines
2.3 KiB
Rust
use nom::bytes::complete::tag;
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use nom::character::complete::anychar;
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use nom::character::complete::one_of;
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use nom::combinator::peek;
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use nom::combinator::recognize;
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use nom::combinator::verify;
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use super::org_source::OrgSource;
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use super::util::maybe_consume_object_trailing_whitespace_if_not_exiting;
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use super::util::text_until_exit;
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use crate::context::ContextElement;
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use crate::context::ExitClass;
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use crate::context::ExitMatcherNode;
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use crate::context::RefContext;
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use crate::error::CustomError;
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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::Target;
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#[cfg_attr(
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feature = "tracing",
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tracing::instrument(ret, level = "debug", skip(context))
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)]
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pub(crate) fn target<'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>, Target<'s>> {
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let (remaining, _) = tag("<<")(input)?;
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let (remaining, _) = peek(verify(anychar, |c| {
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!c.is_whitespace() && !"<>\n".contains(*c)
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}))(remaining)?;
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let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Beta,
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exit_matcher: &target_end,
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});
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let parser_context = context.with_additional_node(&parser_context);
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let (remaining, body) = text_until_exit(&parser_context, remaining)?;
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let preceding_character = remaining
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.get_preceding_character()
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.expect("We cannot be at the start of the file because we are inside a target.");
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if preceding_character.is_whitespace() {
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return Err(nom::Err::Error(CustomError::Static(
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"Targets cannot end with whitespace.",
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)));
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}
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let (remaining, _) = tag(">>")(remaining)?;
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let (remaining, post_blank) =
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maybe_consume_object_trailing_whitespace_if_not_exiting(context, 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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Target {
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source: source.into(),
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value: body.into(),
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post_blank: post_blank.map(Into::<&str>::into),
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},
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))
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}
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#[cfg_attr(
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feature = "tracing",
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tracing::instrument(ret, level = "debug", skip(_context))
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)]
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fn target_end<'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>, OrgSource<'s>> {
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recognize(one_of("<>\n"))(input)
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}
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