Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / constants / singletons / FailFunction.java

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/singletons/FailFunction.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/singletons/FailFunction.java
new file mode 100644 (file)
index 0000000..622f2a4
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/singletons/FailFunction.java
@@ -0,0 +1,40 @@
+package org.simantics.scl.compiler.constants.singletons;
+
+import org.cojen.classfile.TypeDesc;
+import org.simantics.scl.compiler.constants.FunctionValue;
+import org.simantics.scl.compiler.internal.codegen.references.Val;
+import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+import org.simantics.scl.compiler.types.kinds.Kinds;
+
+public class FailFunction extends FunctionValue {
+
+    private static final TVar A = Types.var(Kinds.STAR);
+    public static final FailFunction INSTANCE = 
+            new FailFunction();
+    
+    private FailFunction() {
+        super(new TVar[] {A}, Types.NO_EFFECTS, A, Types.STRING);
+    }
+    
+    private static final TypeDesc RuntimeException = 
+            TypeDesc.forClass(RuntimeException.class);
+    
+    @Override
+    public Type applyExact(MethodBuilder mb, Val[] parameters) {
+        mb.newObject(RuntimeException);
+        mb.dup();
+        mb.push(parameters, parameterTypes);
+        mb.invokeConstructor(RuntimeException, 
+                new TypeDesc[] {TypeDesc.STRING});
+        mb.throwObject();
+        return getReturnType();
+    }
+
+    @Override
+    public String toString() {
+         return "fail";
+    }
+}