Added HalfVector class

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## 0.1.1 (unreleased)
 
-- Added `Vector` class
+- Added `Vector` and `HalfVector` classes
 
 ## 0.1.0 (2023-10-17)
 

lib/halfvec.dart

@@ -0,0 +1,14 @@
+class HalfVector {
+  final List<double> vec;
+
+  const HalfVector(this.vec);
+
+  List<double> toList() {
+    return vec;
+  }
+
+  @override
+  String toString() {
+    return vec.toString();
+  }
+}

lib/pgvector.dart

@@ -1,7 +1,10 @@
 import 'dart:convert';
 import 'dart:typed_data';
 
+import 'halfvec.dart';
 import 'vector.dart';
+
+export 'halfvec.dart' show HalfVector;
 export 'vector.dart' show Vector;
 
 class Pgvector {

test/postgres_test.dart

@@ -17,14 +17,18 @@ void main() {
     await connection.execute("DROP TABLE IF EXISTS items");
 
     await connection.execute(
-        "CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))");
+        "CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3), half_embedding halfvec(3))");
 
     await connection.execute(
-        Sql.named("INSERT INTO items (embedding) VALUES (@a), (@b), (@c)"),
+        Sql.named(
+            "INSERT INTO items (embedding, half_embedding) VALUES (@a, @d), (@b, @e), (@c, @f)"),
         parameters: {
           "a": Vector([1, 1, 1]).toString(),
           "b": Vector([2, 2, 2]).toString(),
-          "c": Vector([1, 1, 2]).toString()
+          "c": Vector([1, 1, 2]).toString(),
+          "d": HalfVector([1, 1, 1]).toString(),
+          "e": HalfVector([2, 2, 2]).toString(),
+          "f": HalfVector([1, 1, 2]).toString()
         });
 
     List<List<dynamic>> results = await connection.execute(