Restored support for .NET Standard 2.0 - resolves #48

Co-authored-by: Shay Rojansky <[email protected]>

Author: ankane

src/Pgvector.Dapper/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.1 (unreleased)
+
+- Restored support for .NET Standard 2.0
+
 ## 0.3.0 (2024-06-25)
 
 - Added support for `halfvec` and `sparsevec` types

src/Pgvector.Dapper/HalfvecTypeHandler.cs

@@ -6,6 +6,8 @@
 
 namespace Pgvector.Dapper;
 
+#if NET5_0_OR_GREATER
+
 public class HalfvecTypeHandler : SqlMapper.TypeHandler<HalfVector?>
 {
     public override HalfVector? Parse(object value)
@@ -26,3 +28,5 @@ public override void SetValue(IDbDataParameter parameter, HalfVector? value)
         }
     }
 }
+
+#endif

src/Pgvector.Dapper/Pgvector.Dapper.csproj

@@ -9,7 +9,7 @@
     <PackageProjectUrl>https://github.com/pgvector/pgvector-dotnet</PackageProjectUrl>
     <PackageReadmeFile>README.md</PackageReadmeFile>
 
-    <TargetFrameworks>net6.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;netstandard2.0;net462</TargetFrameworks>
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>

src/Pgvector/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.1 (unreleased)
+
+- Restored support for .NET Standard 2.0
+
 ## 0.3.0 (2024-06-25)
 
 - Added support for `halfvec` and `sparsevec` types

src/Pgvector/HalfVector.cs

@@ -4,6 +4,8 @@
 
 namespace Pgvector;
 
+#if NET5_0_OR_GREATER
+
 public class HalfVector : IEquatable<HalfVector>
 {
     public ReadOnlyMemory<Half> Memory { get; }
@@ -42,3 +44,5 @@ public override int GetHashCode()
         return hashCode.ToHashCode();
     }
 }
+
+#endif

src/Pgvector/Npgsql/HalfvecConverter.cs

@@ -5,6 +5,8 @@
 
 namespace Pgvector.Npgsql;
 
+#if NET5_0_OR_GREATER
+
 public class HalfvecConverter : PgStreamingConverter<HalfVector>
 {
     public override HalfVector Read(PgReader reader)
@@ -89,3 +91,5 @@ public override async ValueTask WriteAsync(
         }
     }
 }
+
+#endif

src/Pgvector/Npgsql/VectorTypeInfoResolverFactory.cs

@@ -21,8 +21,10 @@ static TypeInfoMappingCollection AddMappings(TypeInfoMappingCollection mappings)
         {
             mappings.AddType<Vector>("vector",
                 static (options, mapping, _) => mapping.CreateInfo(options, new VectorConverter()), isDefault: true);
+#if NET5_0_OR_GREATER
             mappings.AddType<HalfVector>("halfvec",
                 static (options, mapping, _) => mapping.CreateInfo(options, new HalfvecConverter()), isDefault: true);
+#endif
             mappings.AddType<SparseVector>("sparsevec",
                 static (options, mapping, _) => mapping.CreateInfo(options, new SparsevecConverter()), isDefault: true);
             return mappings;
@@ -40,7 +42,9 @@ sealed class ArrayResolver : Resolver, IPgTypeInfoResolver
         static TypeInfoMappingCollection AddMappings(TypeInfoMappingCollection mappings)
         {
             mappings.AddArrayType<Vector>("vector");
+#if NET5_0_OR_GREATER
             mappings.AddArrayType<HalfVector>("halfvec");
+#endif
             mappings.AddArrayType<SparseVector>("sparsevec");
             return mappings;
         }

src/Pgvector/Pgvector.csproj

@@ -9,7 +9,7 @@
     <PackageProjectUrl>https://github.com/pgvector/pgvector-dotnet</PackageProjectUrl>
     <PackageReadmeFile>README.md</PackageReadmeFile>
 
-    <TargetFrameworks>net6.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;netstandard2.0;net462</TargetFrameworks>
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>
     <NoWarn>NPG9001</NoWarn>

src/Pgvector/SparseVector.cs

@@ -70,15 +70,15 @@ public SparseVector(IDictionary<int, float> dictionary, int dimensions)
 
     public SparseVector(string s)
     {
-        var parts = s.Split('/', 2);
+        var parts = s.Split(['/'], 2);
         var elements = parts[0].Substring(1, parts[0].Length - 2).Split(',');
         var nnz = elements.Length;
         var indices = new int[nnz];
         var values = new float[nnz];
 
         for (int i = 0; i < nnz; i++)
         {
-            var ep = elements[i].Split(':', 2);
+            var ep = elements[i].Split([':'], 2);
             indices[i] = Int32.Parse(ep[0], CultureInfo.InvariantCulture) - 1;
             values[i] = float.Parse(ep[1], CultureInfo.InvariantCulture);
         }