fix: Using covariant interface for IParser and IParseResult.

Rename CanonSharp.Common to CanonSharp.Pascal.

CanonSharp.Tests/CombinatorsTests/BasicParsersTests.cs

@@ -11,7 +11,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void AlternativeTest()
     {
-        Parser<char, char> parser = Token('a') | Token('b');
+        IParser<char, char> parser = Token('a') | Token('b');
 
         ValidateSuccessfulResult(parser, 'a', "abc");
         ValidateSuccessfulResult(parser, 'b', "bcd");
@@ -26,7 +26,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void BindTest()
     {
-        Parser<char, char> parser = Token('a').Bind(_ => Token('b')).Bind(_ => Token('c'));
+        IParser<char, char> parser = Token('a').Bind(_ => Token('b')).Bind(_ => Token('c'));
         ValidateSuccessfulResult(parser, 'c', "abc");
         ValidateFailedResult(parser, "acd");
 
@@ -36,7 +36,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void MapTest()
     {
-        Parser<char, string> parser = Token('a').Map(c => $"{c}");
+        IParser<char, string> parser = Token('a').Map(c => $"{c}");
         ValidateSuccessfulResult(parser, "a", "abc");
 
         parser = Token('a').Map("test");
@@ -46,7 +46,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void NextTest()
     {
-        Parser<char, char> parser = Token('a').Next(_ => Token('a'), _ => Token('b'));
+        IParser<char, char> parser = Token('a').Next(_ => Token('a'), _ => Token('b'));
         ValidateSuccessfulResult(parser, 'a', "aaa");
         ValidateSuccessfulResult(parser, 'b', "bbb");
 
@@ -61,7 +61,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void NextTest2()
     {
-        Parser<char, string> parser = Token('a').Next(_ => "123", _ => Pure<char, string>("456"));
+        IParser<char, string> parser = Token('a').Next(_ => "123", _ => Pure<char, string>("456"));
         ValidateSuccessfulResult(parser, "123", "aaa");
         ValidateSuccessfulResult(parser, "456", "bbb");
 
@@ -77,7 +77,7 @@ public class BasicParsersTests : ParserTestsBase
     [Fact]
     public void FixTest()
     {
-        Parser<char, char> parser = Fix<char, Unit>(self => Token('a').Next(_ => self, Unit.Instance))
+        IParser<char, char> parser = Fix<char, Unit>(self => Token('a').Next(_ => self, Unit.Instance))
             .Bind(_ => Token('b'));
         ValidateSuccessfulResult(parser, 'b', "aaaaab");
     }