62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
use nom::branch::alt;
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use nom::bytes::complete::tag;
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use nom::character::complete::anychar;
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use nom::combinator::opt;
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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 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::Context;
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use crate::error::Res;
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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::get_consumed;
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use crate::parser::ExportSnippet;
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#[tracing::instrument(ret, level = "debug")]
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pub fn export_snippet<'r, 's>(
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context: Context<'r, 's>,
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input: &'s str,
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) -> Res<&'s str, ExportSnippet<'s>> {
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let (remaining, _) = tag("@@")(input)?;
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let (remaining, backend_name) = backend(context, remaining)?;
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let (remaining, backend_contents) =
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opt(tuple((tag(":"), parser_with_context!(contents)(context))))(remaining)?;
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let (remaining, _) = tag("@@")(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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ExportSnippet {
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source,
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backend: backend_name,
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contents: backend_contents.map(|(_colon, backend_contents)| backend_contents),
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},
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))
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}
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#[tracing::instrument(ret, level = "debug")]
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fn backend<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
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let (remaining, backend_name) =
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recognize(many1(verify(anychar, |c| c.is_alphanumeric() || *c == '-')))(input)?;
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Ok((remaining, backend_name))
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}
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#[tracing::instrument(ret, level = "debug")]
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fn contents<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
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let (remaining, source) = recognize(verify(
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many_till(
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anychar,
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peek(alt((
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parser_with_context!(exit_matcher_parser)(context),
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tag("@@"),
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))),
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),
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|(children, _exit_contents)| !children.is_empty(),
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))(input)?;
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Ok((remaining, source))
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}
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