Add exception type definitions to Patio

5 files changed, 27 insertions, 1 deletions

diff --git a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java
index e9329115..114922e4 100644
--- a/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java
+++ b/src/main/java/org/shedlang/compiler/backends/llvm/LlvmPatioCodeGen.java
@@ -38,6 +38,8 @@ public class LlvmPatioCodeGen {
                         patioTypeToLlvmType(patioFunctionDeclaration.returnType())
                     );
                 }
+                case PatioExceptionTypeDefinition patioExceptionTypeDefinition -> {
+                }
                 case PatioFunctionDefinition patioFunctionDefinition -> {
                     context = context.addFunctionNameToReturnType(
                         patioFunctionDefinition.name(),
@@ -70,6 +72,9 @@ public class LlvmPatioCodeGen {
 
             case PatioDataElementMutable patioDataElementMutable ->
                 generateDataElementMutable(patioDataElementMutable, context);
+            
+            case PatioExceptionTypeDefinition patioExceptionTypeDefinition ->
+                throw new UnsupportedOperationException("TODO");
 
             case PatioFunctionDeclaration patioFunctionDeclaration ->
                 generateFunctionDeclaration(patioFunctionDeclaration, context);
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/WasmPatioCodeGen.java b/src/main/java/org/shedlang/compiler/backends/wasm/WasmPatioCodeGen.java
index 7e15fa18..3436ef1b 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/WasmPatioCodeGen.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/WasmPatioCodeGen.java
@@ -69,6 +69,9 @@ public class WasmPatioCodeGen {
                         new WasmImportDescriptor.Func(name, wasmFuncType)
                     ));
                 }
+                case PatioExceptionTypeDefinition patioExceptionTypeDefinition -> {
+                    throw new UnsupportedOperationException("TODO");
+                }
                 case PatioFunctionDefinition patioFunctionDefinition -> {
                     var name = patioFunctionDefinition.name();
 
diff --git a/src/main/java/org/shedlang/compiler/patio/ast/PatioCompilationUnitElement.java b/src/main/java/org/shedlang/compiler/patio/ast/PatioCompilationUnitElement.java
index 6caafb3d..038b0fba 100644
--- a/src/main/java/org/shedlang/compiler/patio/ast/PatioCompilationUnitElement.java
+++ b/src/main/java/org/shedlang/compiler/patio/ast/PatioCompilationUnitElement.java
@@ -2,7 +2,7 @@ package org.shedlang.compiler.patio.ast;
 
 import org.shedlang.compiler.sources.Source;
 
-public sealed interface PatioCompilationUnitElement permits PatioDataElementImmutable, PatioDataElementMutable, PatioFunctionDeclaration, PatioFunctionDefinition {
+public sealed interface PatioCompilationUnitElement permits PatioDataElementImmutable, PatioDataElementMutable, PatioExceptionTypeDefinition, PatioFunctionDeclaration, PatioFunctionDefinition {
     String name();
     Source source();
 }
diff --git a/src/main/java/org/shedlang/compiler/patio/ast/PatioExceptionTypeDefinition.java b/src/main/java/org/shedlang/compiler/patio/ast/PatioExceptionTypeDefinition.java
new file mode 100644
index 00000000..7dabc809
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/patio/ast/PatioExceptionTypeDefinition.java
@@ -0,0 +1,11 @@
+package org.shedlang.compiler.patio.ast;
+
+import org.shedlang.compiler.patio.ast.types.PatioType;
+import org.shedlang.compiler.sources.Source;
+
+public record PatioExceptionTypeDefinition(
+    String name,
+    PatioType valueType,
+    Source source
+) implements PatioCompilationUnitElement {
+}
diff --git a/src/main/java/org/shedlang/compiler/patio/ast/PatioSerializer.java b/src/main/java/org/shedlang/compiler/patio/ast/PatioSerializer.java
index 2b052800..c333ea80 100644
--- a/src/main/java/org/shedlang/compiler/patio/ast/PatioSerializer.java
+++ b/src/main/java/org/shedlang/compiler/patio/ast/PatioSerializer.java
@@ -95,6 +95,13 @@ public class PatioSerializer {
                     dataLayoutToTree(dataElementMutable.layout())
                 );
 
+            case PatioExceptionTypeDefinition exceptionTypeDefinition ->
+                treeList(
+                    treeIdentifier("exception-type"),
+                    treeString(exceptionTypeDefinition.name()),
+                    typeToTree(exceptionTypeDefinition.valueType())
+                );
+
             case PatioFunctionDeclaration functionDeclaration ->
                 treeListIndented(
                     treeIdentifier("function-decl"),