34 lines
667 B
Rust
34 lines
667 B
Rust
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use crate::bnf::Bnf;
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use crate::parser::{ParseResult, Parser, ParserInput};
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pub struct BoxedParser<'a, I, O, E>
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where
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I: ParserInput,
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{
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inner: Box<dyn Parser<I, O, E> + 'a>,
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}
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impl<'a, I, O, E> BoxedParser<'a, I, O, E>
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where
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I: ParserInput,
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{
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pub(crate) fn new<P>(inner: P) -> Self
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where
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P: Parser<I, O, E> + 'a,
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{
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BoxedParser {
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inner: Box::new(inner),
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}
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}
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}
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impl<'a, I: ParserInput, O, E> Parser<I, O, E> for BoxedParser<'a, I, O, E> {
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fn parse(&self, input: I) -> ParseResult<I, O, E> {
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self.inner.parse(input)
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}
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fn bnf(&self) -> Option<Bnf> {
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self.inner.bnf()
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}
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}
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