Boxed parser
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21
src/lib.rs
21
src/lib.rs
@ -8,6 +8,27 @@ trait Parser<I, O, E> {
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fn parse(&self, input: I) -> ParseResult<I, O, E>;
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}
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struct BoxedParser<I, O, E> {
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inner: Box<dyn Parser<I, O, E>>,
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}
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impl<I, O, E> BoxedParser<I, O, E> {
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fn new<P>(inner: P) -> Self
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where
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P: Parser<I, O, E> + 'static,
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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<I, O, E> Parser<I, O, E> for BoxedParser<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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}
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impl<I, O, E, F> Parser<I, O, E> for F
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where
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F: Fn(I) -> ParseResult<I, O, E>,
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