Add typed sub node

2 files changed, 8 insertions, 2 deletions

diff --git a/src/main/java/org/shedlang/compiler/ast/typed/TypedBinaryOperator.java b/src/main/java/org/shedlang/compiler/ast/typed/TypedBinaryOperator.java
index 5f6498f6..9f5fdf2c 100644
--- a/src/main/java/org/shedlang/compiler/ast/typed/TypedBinaryOperator.java
+++ b/src/main/java/org/shedlang/compiler/ast/typed/TypedBinaryOperator.java
@@ -4,7 +4,8 @@ import org.shedlang.compiler.types.Type;
 import org.shedlang.compiler.types.Types;
 
 public enum TypedBinaryOperator {
-    INT_ADD(Types.INT);
+    INT_ADD(Types.INT),
+    INT_SUB(Types.INT);;
 
     private final Type type;
 
diff --git a/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java b/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
index c96b8cfd..75afaa31 100644
--- a/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
+++ b/src/main/java/org/shedlang/compiler/stackir/StackCompiler.java
@@ -15,7 +15,12 @@ public class StackCompiler {
     private static PVector<Instruction> compileBinaryOperation(TypedBinaryOperationNode node) {
         return compileExpression(node.left())
             .plusAll(compileExpression(node.right()))
-            .plus(new IntAddInstruction(node.source()));
+            .plus(switch (node.operator()) {
+                case INT_ADD ->
+                    new IntAddInstruction(node.source());
+                case INT_SUB ->
+                    new IntSubInstruction(node.source());
+            });
     }
 
     private static PVector<Instruction> compileBoolLiteral(TypedBoolLiteralNode node) {