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メッメモリリークだあーーにげろーー
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using System.Collections.Generic; | |
using ParsecSharp; | |
using ParsecSharp.Internal; | |
namespace ParsecSharp.Extensions | |
{ | |
public static class Parser | |
{ | |
public static Parser<TToken, T> Memoize<TToken, T>(Parser<TToken, T> parser) | |
{ | |
var cache = new Dictionary<IParsecStateStream<TToken>, Result<TToken, T>>(); | |
return Builder.GetState<TToken>() | |
.Bind(state => (cache.TryGetValue(state, out var result)) | |
? Builder.Create<TToken, T>(_ => result) | |
: parser.ModifyResult( | |
(_, fail) => { cache[state] = fail; return fail; }, | |
(_, success) => { cache[state] = success; return success; })); | |
} | |
} | |
} |
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