jackfiled
3ed8bf5d36
All checks were successful
Run unit test / Unit-Test (push) Successful in 41s
Reviewed-on: https://git.bupt-hpc.cn/jackfiled/CanonSharp/pulls/2 Co-authored-by: jackfiled <xcrenchangjun@outlook.com> Co-committed-by: jackfiled <xcrenchangjun@outlook.com>
27 lines
1.1 KiB
C#
27 lines
1.1 KiB
C#
using CanonSharp.Combinator.Abstractions;
|
|
|
|
namespace CanonSharp.Combinator.Parsers.Modifiers;
|
|
|
|
/// <summary>
|
|
/// 翻转结果的解析器
|
|
/// 当成功时失败
|
|
/// 当失败时返回指定的成功结果
|
|
/// </summary>
|
|
/// <param name="parser">上游解析器</param>
|
|
/// <param name="result">期望中的结果</param>
|
|
/// <typeparam name="TToken">输入流的类型</typeparam>
|
|
/// <typeparam name="TIntermediate">上游解析器结果类型</typeparam>
|
|
/// <typeparam name="T">最终的返回结果</typeparam>
|
|
internal sealed class ReverseParser<TToken, TIntermediate, T>(Parser<TToken, TIntermediate> parser, T result)
|
|
: ModifiedParser<TToken, TIntermediate, T>(parser)
|
|
{
|
|
protected override ParseResult<TToken, T> Succeed<TState>(TState state,
|
|
SuccessfulResult<TToken, TIntermediate> successfulResult)
|
|
=> ParseResultBuilder.Fail<TToken, TState, T>($"Unexpected successful result: {successfulResult.Value}",
|
|
state);
|
|
|
|
protected override ParseResult<TToken, T> Fail<TState>(TState state,
|
|
FailedResult<TToken, TIntermediate> failedResult)
|
|
=> ParseResultBuilder.Succeed<TToken, TState, T>(result, state);
|
|
}
|