Add named objects

2 files changed, 18 insertions, 1 deletions

diff --git a/src/main/java/moe/nea/pcj/json/JsonCodec.java b/src/main/java/moe/nea/pcj/json/JsonCodec.java
index 6195bee..c5c750b 100644
--- a/src/main/java/moe/nea/pcj/json/JsonCodec.java
+++ b/src/main/java/moe/nea/pcj/json/JsonCodec.java
@@ -2,7 +2,6 @@ package moe.nea.pcj.json;
 
 import moe.nea.pcj.Codec;
 import moe.nea.pcj.Result;
-import moe.nea.pcj.Unit;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -47,6 +46,20 @@ public interface JsonCodec<T, Format> extends Codec<
 		};
 	}
 
+	default JsonCodec<T, Format> named(String name) {
+		return new JsonCodec<>() {
+			@Override
+			public Result<? extends T, JsonLikeError> decode(Format format, JsonLikeOperations<Format> ops) {
+				return JsonCodec.this.decode(format, ops).mapError(it -> new NamedObject(name, it));
+			}
+
+			@Override
+			public Result<? extends Format, JsonLikeError> encode(T data, JsonLikeOperations<Format> ops) {
+				return JsonCodec.this.encode(data, ops).mapError(it -> new NamedObject(name, it));
+			}
+		};
+	}
+
 	default MapCodec<T, Format> fieldOf(String key) {
 		return new MapCodec<>() {
 			@Override
diff --git a/src/main/java/moe/nea/pcj/json/NamedObject.java b/src/main/java/moe/nea/pcj/json/NamedObject.java
new file mode 100644
index 0000000..aedc87b
--- /dev/null
+++ b/src/main/java/moe/nea/pcj/json/NamedObject.java
@@ -0,0 +1,4 @@
+package moe.nea.pcj.json;
+
+public record NamedObject(String name, JsonLikeError error) implements JsonLikeError {
+}