Add WasmBlockType.EMPTY

3 files changed, 5 insertions, 3 deletions

diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/PatioToWasm.java b/src/main/java/org/shedlang/compiler/backends/wasm/PatioToWasm.java
index 978fe6cf..11e6c22f 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/PatioToWasm.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/PatioToWasm.java
@@ -1131,14 +1131,14 @@ public class PatioToWasm {
     private static class WasmBlockInstructionBuilder implements WasmStructuredInstructionBuilder {
         @Override
         public WasmInstruction exit(PVector<WasmInstruction> instructions) {
-            return new WasmBlock(new WasmBlockType(List.of()), instructions);
+            return new WasmBlock(WasmBlockType.EMPTY, instructions);
         }
     }
 
     private static class WasmLoopInstructionBuilder implements WasmStructuredInstructionBuilder {
         @Override
         public WasmInstruction exit(PVector<WasmInstruction> instructions) {
-            return new WasmLoop(new WasmBlockType(List.of()), instructions);
+            return new WasmLoop(WasmBlockType.EMPTY, instructions);
         }
     }
 
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBlockType.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBlockType.java
index b4be7654..731deb06 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBlockType.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBlockType.java
@@ -6,6 +6,8 @@ import java.util.Arrays;
 import java.util.List;
 
 public record WasmBlockType(List<WasmValueType> resultTypes) {
+    public static final WasmBlockType EMPTY = new WasmBlockType(List.of());
+
     public static WasmBlockType of(WasmValueType... resultTypes) {
         return new WasmBlockType(Arrays.asList(resultTypes));
     }
diff --git a/src/test/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructionsTests.java b/src/test/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructionsTests.java
index 06e8f0ea..a14763d5 100644
--- a/src/test/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructionsTests.java
+++ b/src/test/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructionsTests.java
@@ -26,7 +26,7 @@ public class WasmBinaryFormatInstructionsTests {
         var instructions = List.of(
             new WasmI32Const(0),
             new WasmIf(
-                WasmBlockType.of(),
+                WasmBlockType.EMPTY,
                 List.of(),
                 List.of()
             )