Set name of EmptyMessageContent to avoid constraint error

Author: Alexander Pann

code/languages/org.iets3.opensource/languages/org.iets3.core.expr.messages/models/constraints.mps

@@ -15,6 +15,7 @@
     <import index="pbu6" ref="r:83e946de-2a7f-4a4c-b3c9-4f671aa7f2db(org.iets3.core.expr.base.behavior)" implicit="true" />
     <import index="aafr" ref="r:fc2b8fcf-559d-4f16-ae65-376838b59be6(org.iets3.core.expr.messages.behavior)" implicit="true" />
     <import index="5qo5" ref="r:6d93ddb1-b0b0-4eee-8079-51303666672a(org.iets3.core.expr.simpleTypes.structure)" implicit="true" />
+    <import index="tpck" ref="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" implicit="true" />
   </imports>
   <registry>
     <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
@@ -25,6 +26,9 @@
       <concept id="1137021947720" name="jetbrains.mps.baseLanguage.structure.ConceptFunction" flags="in" index="2VMwT0">
         <child id="1137022507850" name="body" index="2VODD2" />
       </concept>
+      <concept id="1070475926800" name="jetbrains.mps.baseLanguage.structure.StringLiteral" flags="nn" index="Xl_RD">
+        <property id="1070475926801" name="value" index="Xl_RC" />
+      </concept>
       <concept id="1081236700937" name="jetbrains.mps.baseLanguage.structure.StaticMethodCall" flags="nn" index="2YIFZM">
         <reference id="1144433194310" name="classConcept" index="1Pybhc" />
       </concept>
@@ -51,6 +55,7 @@
       <concept id="1068580123137" name="jetbrains.mps.baseLanguage.structure.BooleanConstant" flags="nn" index="3clFbT">
         <property id="1068580123138" name="value" index="3clFbU" />
       </concept>
+      <concept id="1068581242875" name="jetbrains.mps.baseLanguage.structure.PlusExpression" flags="nn" index="3cpWs3" />
       <concept id="1068581242878" name="jetbrains.mps.baseLanguage.structure.ReturnStatement" flags="nn" index="3cpWs6">
         <child id="1068581517676" name="expression" index="3cqZAk" />
       </concept>
@@ -62,18 +67,29 @@
         <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
         <child id="1068499141038" name="actualArgument" index="37wK5m" />
       </concept>
+      <concept id="1081773326031" name="jetbrains.mps.baseLanguage.structure.BinaryOperation" flags="nn" index="3uHJSO">
+        <child id="1081773367579" name="rightExpression" index="3uHU7w" />
+        <child id="1081773367580" name="leftExpression" index="3uHU7B" />
+      </concept>
     </language>
     <language id="3f4bc5f5-c6c1-4a28-8b10-c83066ffa4a1" name="jetbrains.mps.lang.constraints">
       <concept id="6702802731807351367" name="jetbrains.mps.lang.constraints.structure.ConstraintFunction_CanBeAChild" flags="in" index="9S07l" />
       <concept id="6702802731807420587" name="jetbrains.mps.lang.constraints.structure.ConstraintFunction_CanBeAParent" flags="ig" index="9SLcT" />
       <concept id="1202989658459" name="jetbrains.mps.lang.constraints.structure.ConstraintFunctionParameter_parentNode" flags="nn" index="nLn13" />
       <concept id="8966504967485224688" name="jetbrains.mps.lang.constraints.structure.ConstraintFunctionParameter_contextNode" flags="nn" index="2rP1CM" />
       <concept id="4303308395523096213" name="jetbrains.mps.lang.constraints.structure.ConstraintFunctionParameter_childConcept" flags="ng" index="2DD5aU" />
+      <concept id="1147467115080" name="jetbrains.mps.lang.constraints.structure.NodePropertyConstraint" flags="ng" index="EnEH3">
+        <reference id="1147467295099" name="applicableProperty" index="EomxK" />
+        <child id="1147468630220" name="propertyGetter" index="EtsB7" />
+      </concept>
+      <concept id="1147467790433" name="jetbrains.mps.lang.constraints.structure.ConstraintFunction_PropertyGetter" flags="in" index="Eqf_E" />
+      <concept id="1147468365020" name="jetbrains.mps.lang.constraints.structure.ConstraintsFunctionParameter_node" flags="nn" index="EsrRn" />
       <concept id="5564765827938091039" name="jetbrains.mps.lang.constraints.structure.ConstraintFunction_ReferentSearchScope_Scope" flags="ig" index="3dgokm" />
       <concept id="1213093968558" name="jetbrains.mps.lang.constraints.structure.ConceptConstraints" flags="ng" index="1M2fIO">
         <reference id="1213093996982" name="concept" index="1M2myG" />
         <child id="6702802731807532712" name="canBeParent" index="9SGkU" />
         <child id="6702802731807737306" name="canBeChild" index="9Vyp8" />
+        <child id="1213098023997" name="property" index="1MhHOB" />
         <child id="1213100494875" name="referent" index="1Mr941" />
       </concept>
       <concept id="1148687176410" name="jetbrains.mps.lang.constraints.structure.NodeReferentConstraint" flags="ng" index="1N5Pfh">
@@ -85,6 +101,7 @@
       <concept id="1176544042499" name="jetbrains.mps.lang.typesystem.structure.Node_TypeOperation" flags="nn" index="3JvlWi" />
     </language>
     <language id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel">
+      <concept id="1179168000618" name="jetbrains.mps.lang.smodel.structure.Node_GetIndexInParentOperation" flags="nn" index="2bSWHS" />
       <concept id="1177026924588" name="jetbrains.mps.lang.smodel.structure.RefConcept_Reference" flags="nn" index="chp4Y">
         <reference id="1177026940964" name="conceptDeclaration" index="cht4Q" />
       </concept>
@@ -612,5 +629,26 @@
       </node>
     </node>
   </node>
+  <node concept="1M2fIO" id="1IYzzr$Utl4">
+    <ref role="1M2myG" to="kelk:3vxfdxbcS_H" resolve="EmptyMessageContent" />
+    <node concept="EnEH3" id="1IYzzr$Utl5" role="1MhHOB">
+      <ref role="EomxK" to="tpck:h0TrG11" resolve="name" />
+      <node concept="Eqf_E" id="1IYzzr$UtnD" role="EtsB7">
+        <node concept="3clFbS" id="1IYzzr$UtnE" role="2VODD2">
+          <node concept="3clFbF" id="1IYzzr$Uttv" role="3cqZAp">
+            <node concept="3cpWs3" id="1IYzzr$UtPP" role="3clFbG">
+              <node concept="2OqwBi" id="1IYzzr$UufF" role="3uHU7w">
+                <node concept="EsrRn" id="1IYzzr$UtQp" role="2Oq$k0" />
+                <node concept="2bSWHS" id="1IYzzr$UuEt" role="2OqNvi" />
+              </node>
+              <node concept="Xl_RD" id="1IYzzr$Uttu" role="3uHU7B">
+                <property role="Xl_RC" value="___empty_" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+  </node>
 </model>