CHR query translation and support for assignment in CHR bodies

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / elaboration / chr / CHRLiteral.java

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRLiteral.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRLiteral.java
index e7b3320d77758d87b023904aa880f980a99f8ec5..918dd9fb309ef25d4d9dfd3f156e60b7d4b097e5 100644 (file)
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRLiteral.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRLiteral.java
@@ -47,6 +47,11 @@ public class CHRLiteral extends Symbol {
     }
 
     public void resolve(TranslationContext context) {
+        if(relation == SpecialCHRRelation.ASSIGN) {
+            parameters[1] = parameters[1].resolve(context);
+            parameters[0] = parameters[0].resolveAsPattern(context);
+            return;
+        }
         if(parameters != null) {
             for(int i=0;i<parameters.length;++i)
                 parameters[i] = parameters[i].resolve(context);
@@ -123,6 +128,11 @@ public class CHRLiteral extends Symbol {
             parameters[0] = parameters[0].checkIgnoredType(context);
             typeConstraintEvidenceParameters = Expression.EMPTY_ARRAY;
         }
+        else if(relation == SpecialCHRRelation.ASSIGN) {
+            parameters[1] = parameters[1].inferType(context);
+            parameters[0] = parameters[0].checkTypeAsPattern(context, parameters[1].getType());
+            typeConstraintEvidenceParameters = Expression.EMPTY_ARRAY;
+        }
         else {
             TVar[] typeVariables = relation.getTypeVariables();
             typeParameters = typeVariables.length == 0 ? Type.EMPTY_ARRAY : new Type[typeVariables.length];
@@ -156,11 +166,16 @@ public class CHRLiteral extends Symbol {
     }
 
     public void collectFreeVariables(THashSet<Variable> vars) {
-        for(Expression parameter : parameters)
-            parameter.collectFreeVariables(vars);
-        if(typeConstraintEvidenceParameters != null)
-            for(Expression parameter : typeConstraintEvidenceParameters)
+        if(relation == SpecialCHRRelation.ASSIGN) {
+            parameters[1].collectFreeVariables(vars);
+        }
+        else {
+            for(Expression parameter : parameters)
                 parameter.collectFreeVariables(vars);
+            if(typeConstraintEvidenceParameters != null)
+                for(Expression parameter : typeConstraintEvidenceParameters)
+                    parameter.collectFreeVariables(vars);
+        }
     }
 
     public void setLocationDeep(long loc) {