Update tfms

Directory.Packages.props

@@ -6,7 +6,7 @@
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="FastExpressionCompiler.Internal.src" Version="4.2.0" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
-    
+
     <!-- Benchmarks -->
     <PackageVersion Include="BenchmarkDotNet" Version="0.13.12" />
     <PackageVersion Include="Pidgin" Version="3.2.3" />
@@ -16,7 +16,8 @@
 
     <!-- Global Package References -->
     <GlobalPackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="all" />
-
+    <GlobalPackageReference Include="PolySharp" Version="1.14.1" PrivateAssets="all" />
+
     <!-- Testing -->
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageVersion Include="xunit" Version="2.8.0" />

src/Parlot/Character.cs

@@ -89,13 +89,13 @@ public static TextSpan DecodeString(TextSpan span)
                 return span;
             }
 
-#if NETSTANDARD2_0
-            var result = CreateString(span.Length, span, static (chars, source) =>
+#if NET6_0_OR_GREATER
+            var result = string.Create(span.Length, span, static (chars, source) =>
 #else
-            var result = String.Create(span.Length, span, static (chars, source) =>
+            var result = "".Create(span.Length, span, static (chars, source) =>
 #endif
             {
-                // The asumption is that the new string will be shorter since escapes results are smaller than their source
+                // The assumption is that the new string will be shorter since escapes results are smaller than their source
 
                 var dataIndex = 0;
                 var buffer = source.Buffer;
@@ -153,17 +153,5 @@ public static TextSpan DecodeString(TextSpan span)
         }
 
         private static int HexValue(char ch) => HexConverter.FromChar(ch);
-
-#if NETSTANDARD2_0
-        private delegate void SpanAction<T, in TArg>(T[] span, TArg arg);
-        private static string CreateString<TState>(int length, TState state, SpanAction<char, TState> action)
-        {
-            var array = new char[length];
-
-            action(array, state);
-
-            return new string(array);
-        }
-#endif
     }
 }

src/Parlot/Fluent/DecimalLiteral.cs

@@ -33,10 +33,10 @@ public override bool Parse(ParseContext context, ref ParseResult<decimal> result
             if (context.Scanner.ReadDecimal())
             {
                 var end = context.Scanner.Cursor.Offset;
-#if !SUPPORTS_SPAN_PARSE
-                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
-#else
+#if NET6_0_OR_GREATER
                 var sourceToParse = context.Scanner.Buffer.AsSpan(start, end - start);
+#else
+                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
 #endif
 
                 if (decimal.TryParse(sourceToParse, NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out var value))
@@ -94,14 +94,14 @@ public CompilationResult Compile(CompilationContext context)
             //
 
             var end = Expression.Variable(typeof(int), $"end{context.NextNumber}");
-#if NETSTANDARD2_0
-            var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
-            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
-            var tryParseMethodInfo = typeof(decimal).GetMethod(nameof(decimal.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(decimal).MakeByRefType()]);
-#else
+#if NET6_0_OR_GREATER
             var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
             var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
             var tryParseMethodInfo = typeof(decimal).GetMethod(nameof(decimal.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(decimal).MakeByRefType()});
+#else
+            var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
+            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
+            var tryParseMethodInfo = typeof(decimal).GetMethod(nameof(decimal.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(decimal).MakeByRefType()]);
 #endif
 
             // TODO: NETSTANDARD2_1 code path

src/Parlot/Fluent/DoubleLiteral.cs

@@ -33,10 +33,10 @@ public override bool Parse(ParseContext context, ref ParseResult<double> result)
             if (context.Scanner.ReadDecimal())
             {
                 var end = context.Scanner.Cursor.Offset;
-#if !SUPPORTS_SPAN_PARSE
-                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
-#else
+#if NET6_0_OR_GREATER
                 var sourceToParse = context.Scanner.Buffer.AsSpan(start, end - start);
+#else
+                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
 #endif
 
                 if (double.TryParse(sourceToParse, NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out var value))
@@ -94,14 +94,14 @@ public CompilationResult Compile(CompilationContext context)
             //
 
             var end = Expression.Variable(typeof(int), $"end{context.NextNumber}");
-#if NETSTANDARD2_0
-            var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
-            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
-            var tryParseMethodInfo = typeof(double).GetMethod(nameof(double.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(double).MakeByRefType()]);
-#else
+#if NET6_0_OR_GREATER
             var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
             var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
             var tryParseMethodInfo = typeof(double).GetMethod(nameof(double.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(double).MakeByRefType()});
+#else
+            var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
+            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
+            var tryParseMethodInfo = typeof(double).GetMethod(nameof(double.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(double).MakeByRefType()]);
 #endif
 
             // TODO: NETSTANDARD2_1 code path

src/Parlot/Fluent/FloatLiteral.cs

@@ -33,10 +33,10 @@ public override bool Parse(ParseContext context, ref ParseResult<float> result)
             if (context.Scanner.ReadDecimal())
             {
                 var end = context.Scanner.Cursor.Offset;
-#if !SUPPORTS_SPAN_PARSE
-                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
-#else
+#if NET6_0_OR_GREATER
                 var sourceToParse = context.Scanner.Buffer.AsSpan(start, end - start);
+#else
+                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
 #endif
 
                 if (float.TryParse(sourceToParse, NumberStyles.AllowLeadingSign | NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out var value))
@@ -94,14 +94,14 @@ public CompilationResult Compile(CompilationContext context)
             //
 
             var end = Expression.Variable(typeof(int), $"end{context.NextNumber}");
-#if NETSTANDARD2_0
+#if NET6_0_OR_GREATER
+            var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
+            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
+            var tryParseMethodInfo = typeof(float).GetMethod(nameof(float.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(float).MakeByRefType() });
+#else
             var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
             var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
             var tryParseMethodInfo = typeof(float).GetMethod(nameof(float.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(float).MakeByRefType()]);
-#else
-            var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
-            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
-            var tryParseMethodInfo = typeof(float).GetMethod(nameof(float.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(float).MakeByRefType()});
 #endif
 
             // TODO: NETSTANDARD2_1 code path

src/Parlot/Fluent/IntegerLiteral.cs

@@ -34,10 +34,10 @@ public override bool Parse(ParseContext context, ref ParseResult<long> result)
             {
                 var end = context.Scanner.Cursor.Offset;
 
-#if !SUPPORTS_SPAN_PARSE
-                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
-#else
+#if NET6_0_OR_GREATER
                 var sourceToParse = context.Scanner.Buffer.AsSpan(start, end - start);
+#else
+                var sourceToParse = context.Scanner.Buffer.Substring(start, end - start);
 #endif
 
                 if (long.TryParse(sourceToParse, NumberStyles.AllowLeadingSign, CultureInfo.InvariantCulture, out var value))
@@ -92,14 +92,14 @@ public CompilationResult Compile(CompilationContext context)
             //
 
             var end = Expression.Variable(typeof(int), $"end{context.NextNumber}");
-#if NETSTANDARD2_0
+#if NET6_0_OR_GREATER
+            var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
+            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
+            var tryParseMethodInfo = typeof(long).GetMethod(nameof(long.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(long).MakeByRefType() });
+#else
             var sourceToParse = Expression.Variable(typeof(string), $"sourceToParse{context.NextNumber}");
             var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(context.Buffer(), typeof(string).GetMethod("Substring", [typeof(int), typeof(int)]), start, Expression.Subtract(end, start)));
             var tryParseMethodInfo = typeof(long).GetMethod(nameof(long.TryParse), [typeof(string), typeof(NumberStyles), typeof(IFormatProvider), typeof(long).MakeByRefType()]);
-#else
-            var sourceToParse = Expression.Variable(typeof(ReadOnlySpan<char>), $"sourceToParse{context.NextNumber}");
-            var sliceExpression = Expression.Assign(sourceToParse, Expression.Call(typeof(MemoryExtensions).GetMethod("AsSpan", new[] { typeof(string), typeof(int), typeof(int) }), context.Buffer(), start, Expression.Subtract(end, start)));
-            var tryParseMethodInfo = typeof(long).GetMethod(nameof(long.TryParse), new[] { typeof(ReadOnlySpan<char>), typeof(NumberStyles), typeof(IFormatProvider), typeof(long).MakeByRefType()});
 #endif
 
             // TODO: NETSTANDARD2_1 code path

src/Parlot/Fluent/Parser.Compile.cs

@@ -108,7 +108,7 @@ private CompilationResult BuildAsNonCompilableParser(CompilationContext context)
             // ParseResult parseResult;
             //
             // success = parser.Parse(context.ParseContext, ref parseResult)
-            // #if not DicardResult
+            // #if not DiscardResult
             // if (success)
             // {
             //    value = parseResult.Value;

src/Parlot/Parlot.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;net8.0</TargetFrameworks>
+    <TargetFrameworks>net462;net6.0;net8.0</TargetFrameworks>
     <Title>Parser combinator for .NET</Title>
     <Description>Parlot is a fast, lightweight and simple to use .NET parser combinator.</Description>
     <PackageTags>parser;interpreter;</PackageTags>
@@ -14,16 +14,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Memory" Condition="'$(TargetFramework)' == 'netstandard2.0'" />
-    <PackageReference Include="System.Collections.Immutable" Condition="'$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'netstandard2.1'" />
+    <PackageReference Include="System.Memory" Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))" />
+    <PackageReference Include="System.Collections.Immutable" Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))" />
     <PackageReference Include="FastExpressionCompiler.Internal.src" PrivateAssets="all" />
   </ItemGroup>
 
-  <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard2.0' ">
-    <DefineConstants>$(DefineConstants);SUPPORTS_READONLYSPAN</DefineConstants>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard2.1' ">
-    <DefineConstants>$(DefineConstants);SUPPORTS_SPAN_PARSE;SUPPORTS_CODENALYSIS</DefineConstants>
-  </PropertyGroup>
 </Project>

src/Parlot/Polyfill.cs

@@ -0,0 +1,28 @@
+#if NET462
+using System.Collections.Generic;
+#endif
+
+namespace Parlot;
+
+internal static class Polyfill
+{
+#if NET462
+    internal static IEnumerable<T> Append<T>(this IEnumerable<T> source, T element)
+    {
+        var result = new List<T>(source);
+        result.Add(element);
+        return result;
+    }
+
+    internal delegate void SpanAction<T, in TArg>(T[] span, TArg arg);
+    internal static string Create<TState>(this string _, int length, TState state, SpanAction<char, TState> action)
+    {
+        var array = new char[length];
+
+        action(array, state);
+
+        return new string(array);
+    }
+
+#endif
+}

src/Parlot/Properties/AssemblyInfo.cs

@@ -1,3 +1 @@
-#if !NET8_0_OR_GREATER
 [module: System.Runtime.CompilerServices.SkipLocalsInit]
-#endif

src/Parlot/ThrowHelper.cs

@@ -1,14 +1,13 @@
 using System;
+#if NET6_0_OR_GREATER
+using System.Diagnostics.CodeAnalysis;
+#endif
 
 namespace Parlot
 {
-#if SUPPORTS_CODENALYSIS
-    using System.Diagnostics.CodeAnalysis;
-#endif
-
     internal static class ThrowHelper
     {
-#if SUPPORTS_CODENALYSIS
+#if NET6_0_OR_GREATER
         [DoesNotReturn]
 #endif
         public static void ThrowArgumentNullException(string paramName)

src/Samples/Calc/Interpreter.cs

@@ -112,10 +112,10 @@ private decimal ParsePrimaryExpression()
 
             if (_scanner.ReadDecimal(out var number))
             {
-#if NETCOREAPP2_1
-                return decimal.Parse(number.GetText(), provider: CultureInfo.InvariantCulture);
-#else
+#if NET6_0_OR_GREATER
                 return decimal.Parse(number.Span, provider: CultureInfo.InvariantCulture);
+#else
+                return decimal.Parse(number.GetText(), provider: CultureInfo.InvariantCulture);
 #endif
             }
 

src/Samples/Calc/Parser.cs

@@ -119,10 +119,10 @@ private Expression ParsePrimaryExpression()
 
             if (_scanner.ReadDecimal(out var number))
             {
-#if NETCOREAPP2_1
-                return new Number(decimal.Parse(number.GetText(), provider: CultureInfo.InvariantCulture));
-#else
+#if NET6_0_OR_GREATER
                 return new Number(decimal.Parse(number.Span, provider: CultureInfo.InvariantCulture));
+#else
+                return new Number(decimal.Parse(number.GetText(), provider: CultureInfo.InvariantCulture));
 #endif
             }
 

test/Parlot.Tests/CursorTests.cs

@@ -307,7 +307,7 @@ public void TextSpanShoudNotThrow()
             Assert.Equal(0, t2.Length);
             Assert.Equal(0, t2.Offset);
 
-#if NETCOREAPP3_1_OR_GREATER
+#if NET6_0_OR_GREATER
             Assert.True(ReadOnlySpan<char>.Empty == t2.Span);
 #endif
         }