fix: Using covariant interface for IParser and IParseResult.

Rename CanonSharp.Common to CanonSharp.Pascal.

CanonSharp.Combinator/Parsers/Primitives/FailedParser.cs

@@ -9,7 +9,7 @@ namespace CanonSharp.Combinator.Parsers.Primitives;
 /// <typeparam name="T">解析结果的类型</typeparam>
 internal sealed class FailedParser<TToken, T> : PrimitiveParser<TToken, T>
 {
-    protected override ParseResult<TToken, T> Run<TState>(TState state)
+    protected override IParseResult<TToken, T> Run<TState>(TState state)
         => ParseResultBuilder.Fail<TToken, TState, T>(state);
 }
 
@@ -21,7 +21,7 @@ internal sealed class FailedParser<TToken, T> : PrimitiveParser<TToken, T>
 /// <typeparam name="T">解析结果的类型</typeparam>
 internal sealed class FailedParserWithMessage<TToken, T>(string message) : PrimitiveParser<TToken, T>
 {
-    protected override ParseResult<TToken, T> Run<TState>(TState state)
+    protected override IParseResult<TToken, T> Run<TState>(TState state)
         => ParseResultBuilder.Fail<TToken, TState, T>(message, state);
 }
 
@@ -34,7 +34,7 @@ internal sealed class FailedParserWithMessage<TToken, T>(string message) : Primi
 internal sealed class FailedParserWithDelayedMessage<TToken, T>(Func<IReadState<TToken>, string> messageFunc)
     : PrimitiveParser<TToken, T>
 {
-    protected override ParseResult<TToken, T> Run<TState>(TState state)
+    protected override IParseResult<TToken, T> Run<TState>(TState state)
         => ParseResultBuilder.Fail<TToken, TState, T>(messageFunc(state), state);
 }
 
@@ -46,6 +46,6 @@ internal sealed class FailedParserWithDelayedMessage<TToken, T>(Func<IReadState<
 /// <typeparam name="T">解析结果的类型</typeparam>
 internal sealed class FailedParserWithException<TToken, T>(Exception e) : PrimitiveParser<TToken, T>
 {
-    protected override ParseResult<TToken, T> Run<TState>(TState state)
+    protected override IParseResult<TToken, T> Run<TState>(TState state)
         => ParseResultBuilder.Fail<TToken, TState, T>(e, state);
 }