4 files changed, 45 insertions, 3 deletions
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
index 6cab80c..7e96716 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
@@ -1,4 +1,4 @@
 package org.zwobble.hobgoblin.compiler.ast.typed;
 
-public sealed interface TypedNamespaceStatementNode extends TypedNode permits TypedStructDefinitionNode, TypedSumDefinitionNode {
+public sealed interface TypedNamespaceStatementNode extends TypedNode permits TypedNativeTypeDefinitionNode, TypedStructDefinitionNode, TypedSumDefinitionNode {
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNativeTypeDefinitionNode.java b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNativeTypeDefinitionNode.java
new file mode 100644
index 0000000..e81705b
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNativeTypeDefinitionNode.java
@@ -0,0 +1,15 @@
+package org.zwobble.hobgoblin.compiler.ast.typed;
+
+import org.zwobble.hobgoblin.compiler.ast.DocComment;
+import org.zwobble.hobgoblin.compiler.sources.Source;
+import org.zwobble.hobgoblin.compiler.types.SimpleNativeType;
+
+public record TypedNativeTypeDefinitionNode(
+    SimpleNativeType type,
+    DocComment docComment,
+    Source source
+) implements TypedNamespaceStatementNode {
+    public String name() {
+        return this.type.name();
+    }
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
index e859170..5d4ffb6 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
@@ -69,6 +69,10 @@ public class JavaTypesGenerator implements Generator {
 
         for (var statement : namespace.body()) {
             switch (statement) {
+                case TypedNativeTypeDefinitionNode nativeTypeDefinition -> {
+                    throw new UnsupportedOperationException("TODO");
+                }
+
                 case TypedStructDefinitionNode structDefinition -> {
                     var javaCompilationUnit = new JavaCompilationUnit(
                         packageParts,
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/typechecker/TypeChecker.java b/src/main/java/org/zwobble/hobgoblin/compiler/typechecker/TypeChecker.java
index 29bcbf8..2579fbe 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/typechecker/TypeChecker.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/typechecker/TypeChecker.java
@@ -41,7 +41,7 @@ public class TypeChecker {
     ) {
         switch (untyped) {
             case UntypedNativeTypeDefinitionNode untypedNativeTypeDefinition ->
-                throw new UnsupportedOperationException("TODO");
+                declareNativeTypeDefinition(untypedNativeTypeDefinition, context);
 
             case UntypedStructDefinitionNode untypedStructDefinition ->
                 declareStructDefinition(untypedStructDefinition, context);
@@ -57,7 +57,7 @@ public class TypeChecker {
     ) {
         return switch (untyped) {
             case UntypedNativeTypeDefinitionNode untypedNativeTypeDefinition ->
-                throw new UnsupportedOperationException("TODO");
+                defineNativeTypeDefinition(untypedNativeTypeDefinition, context);
 
             case UntypedStructDefinitionNode untypedStructDefinition ->
                 defineStructDefinition(untypedStructDefinition, context);
@@ -67,6 +67,29 @@ public class TypeChecker {
         };
     }
 
+    private static void declareNativeTypeDefinition(
+        UntypedNativeTypeDefinitionNode untyped,
+        TypeCheckerNamespaceContext context
+    ) {
+        var nativeType = new SimpleNativeType(context.namespaceName(), untyped.name());
+        // TODO: tidy up declare vs define
+        context.declare(untyped.name());
+        context.define(untyped.name(), new TypeLevelValueType(nativeType));
+    }
+
+    private static TypedNativeTypeDefinitionNode defineNativeTypeDefinition(
+        UntypedNativeTypeDefinitionNode untyped,
+        TypeCheckerNamespaceContext context
+    ) {
+        var nativeType = (SimpleNativeType) lookupMetaType(untyped.name(), untyped.source(), context);
+
+        return new TypedNativeTypeDefinitionNode(
+            nativeType,
+            untyped.docComment(),
+            untyped.source()
+        );
+    }
+
     private static void declareStructDefinition(
         UntypedStructDefinitionNode untyped,
         TypeCheckerNamespaceContext context