From fac333b05f9c2651dc8d164e51e1c3468c524415 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Hannu=20Niemist=C3=B6?= <hannu.niemisto@semantum.fi>
Date: Wed, 25 Oct 2017 11:18:35 +0300
Subject: [PATCH] (refs #7573) Provide typeable with functions with three
 effects

Change-Id: Ieb45cab86a20080ac3c453c6e5cf37edb665cad4
---
 .../scl/compiler/elaboration/java/Builtins.java          | 7 ++++++-
 .../elaboration/constraints/ConstraintEnvironment.java   | 9 +++++++++
 .../src/org/simantics/scl/compiler/types/Types.java      | 4 ++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/java/Builtins.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/java/Builtins.java
index 631ef2ddc..4061b8652 100644
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/java/Builtins.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/java/Builtins.java
@@ -286,7 +286,12 @@ public class Builtins extends ConcreteModule {
                     "union",
                     Types.NO_EFFECTS,
                     Type, Type, Type));
-
+            addValue("TUnion3", new JavaStaticMethod(
+                    "org/simantics/scl/compiler/types/Types",
+                    "union",
+                    Types.NO_EFFECTS,
+                    Type, Type, Type, Type));
+            
             StandardTypeConstructor TypeC = new StandardTypeConstructor(Type, Kinds.STAR, 
                     TypeDesc.forClass("org/simantics/scl/compiler/types/Type"));
             TypeC.setType(Type);
diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/constraints/ConstraintEnvironment.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/constraints/ConstraintEnvironment.java
index 72aa1ea9e..5479371a6 100644
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/constraints/ConstraintEnvironment.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/constraints/ConstraintEnvironment.java
@@ -107,6 +107,15 @@ public class ConstraintEnvironment {
                                 Types.pred(Types.TYPEABLE, union.effects[1])
                             });
                 }
+                else if(union.effects.length == 3) {
+                    return new Reduction(
+                            new EConstant(Builtins.INSTANCE.getValue("TUnion3")),
+                            Type.EMPTY_ARRAY, new TPred[] {
+                                Types.pred(Types.TYPEABLE, union.effects[0]),
+                                Types.pred(Types.TYPEABLE, union.effects[1]),
+                                Types.pred(Types.TYPEABLE, union.effects[2])
+                            });
+                }
             }
         }
         
diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/Types.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/Types.java
index 1a6bdc257..50eec32fe 100644
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/Types.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/types/Types.java
@@ -1050,6 +1050,10 @@ public class Types {
     public static Type union(Type effect1, Type effect2) {
         return new TUnion(effect1, effect2);
     }
+    
+    public static Type union(Type effect1, Type effect2, Type effect3) {
+        return new TUnion(effect1, effect2, effect3);
+    }
 
     public static Type union(List<Type> effects) {
         if(effects.size() == 0)
-- 
2.43.2