From 383137c190cab040d2609f8295ef822c3917b88d Mon Sep 17 00:00:00 2001
From: Kristóf Marussy <kristof@marussy.com>
Date: Sat, 19 Nov 2022 14:00:12 +0100
Subject: feat(language): numeric expressions

---
 subprojects/language-model/problem.aird            | 6057 ++++++++++++--------
 .../src/main/resources/model/problem.ecore         |  139 +-
 .../src/main/resources/model/problem.genmodel      |  102 +-
 3 files changed, 3993 insertions(+), 2305 deletions(-)

(limited to 'subprojects/language-model')

diff --git a/subprojects/language-model/problem.aird b/subprojects/language-model/problem.aird
index b877ac3b..ea236bac 100644
--- a/subprojects/language-model/problem.aird
+++ b/subprojects/language-model/problem.aird
@@ -7,7 +7,19 @@
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+        <target xmi:type="ecore:EPackage" href="src/main/resources/model/problem.ecore#/"/>
+      </ownedRepresentationDescriptors>
+      <ownedRepresentationDescriptors xmi:type="viewpoint:DRepresentationDescriptor" uid="_z1bOYF3lEe2LuOZzJ_LhLg" name="expressions" repPath="#_z1YyIF3lEe2LuOZzJ_LhLg" changeId="385dc42c-cb01-4aee-99fc-b214027a2c01">
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+        <target xmi:type="ecore:EPackage" href="src/main/resources/model/problem.ecore#/"/>
+      </ownedRepresentationDescriptors>
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+        <target xmi:type="ecore:EPackage" href="src/main/resources/model/problem.ecore#/"/>
+      </ownedRepresentationDescriptors>
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@@ -438,15 +226,6 @@
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@@ -454,7 +233,7 @@
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+          <layoutConstraint xmi:type="notation:Bounds" xmi:id="_A9YrQirZEeyyC-O0_LlY9w" x="1713" y="534" width="148" height="100"/>
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@@ -463,7 +242,7 @@
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-          <layoutConstraint xmi:type="notation:Bounds" xmi:id="_N0FQ4irZEeyyC-O0_LlY9w" x="1820" y="720" width="132" height="100"/>
+          <layoutConstraint xmi:type="notation:Bounds" xmi:id="_N0FQ4irZEeyyC-O0_LlY9w" x="1980" y="720" width="132" height="100"/>
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@@ -472,7 +251,7 @@
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-          <layoutConstraint xmi:type="notation:Bounds" xmi:id="_jzknAirZEeyyC-O0_LlY9w" x="1820" y="960" width="120" height="100"/>
+          <layoutConstraint xmi:type="notation:Bounds" xmi:id="_jzknAirZEeyyC-O0_LlY9w" x="1980" y="960" width="120" height="100"/>
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@@ -481,59 +260,11 @@
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@@ -546,70 +277,15 @@
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               <layoutConstraint xmi:type="notation:Location" xmi:id="_gppRUhEKEe2AArBmfNpEZA"/>
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+            <children xmi:type="notation:Node" xmi:id="_uvSwUF4MEe2m7IaHDkh2Xg" type="3010" element="_uumz0F4MEe2m7IaHDkh2Xg">
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         <actualMapping xmi:type="description_1:NodeMapping" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']/@defaultLayer/@containerMappings[name='EC%20EEnum']/@subNodeMappings[name='EC%20EEnumLiteral']"/>
       </ownedElements>
     </ownedDiagramElements>
-    <ownedDiagramElements xmi:type="diagram:DEdge" uid="_6fbFTjQ4Ee2fD4dIhR_vzA" name="[0..1] node" sourceNode="_dZVaANeAEeufiOvRR5sVhg" targetNode="_xsYrUKA8EeuqkpDnuik1sg">
-      <target xmi:type="ecore:EReference" href="src/main/resources/model/problem.ecore#//ConstantAssertionArgument/node"/>
-      <semanticElements xmi:type="ecore:EReference" href="src/main/resources/model/problem.ecore#//ConstantAssertionArgument/node"/>
-      <ownedStyle xmi:type="diagram:EdgeStyle" uid="_6fbsQDQ4Ee2fD4dIhR_vzA" description="_L-JhMKA4EeuqkpDnuik1sg" sourceArrow="FillDiamond" routingStyle="manhattan" strokeColor="0,0,0">
-        <centerLabelStyle xmi:type="diagram:CenterLabelStyle" uid="_6fbsQjQ4Ee2fD4dIhR_vzA" showIcon="false">
-          <customFeatures>labelSize</customFeatures>
-        </centerLabelStyle>
-        <endLabelStyle xmi:type="diagram:EndLabelStyle" uid="_6fbsQTQ4Ee2fD4dIhR_vzA" showIcon="false" labelColor="39,76,114">
-          <customFeatures>labelSize</customFeatures>
-        </endLabelStyle>
-      </ownedStyle>
-      <actualMapping xmi:type="description_1:EdgeMapping" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']/@defaultLayer/@edgeMappings[name='EC_EReference']"/>
-    </ownedDiagramElements>
     <description xmi:type="description_1:DiagramDescription" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']"/>
-    <filterVariableHistory xmi:type="diagram:FilterVariableHistory" uid="_CsWlsKA4EeuqkpDnuik1sg"/>
+    <filterVariableHistory xmi:type="diagram:FilterVariableHistory" uid="_sCFBgV4fEe2rXNsIDUvqhw"/>
     <activatedLayers xmi:type="description_1:Layer" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']/@defaultLayer"/>
     <activatedLayers xmi:type="description_1:AdditionalLayer" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']/@additionalLayers[name='Package']"/>
     <activatedLayers xmi:type="description_1:AdditionalLayer" href="platform:/plugin/org.eclipse.emf.ecoretools.design/description/ecore.odesign#//@ownedViewpoints[name='Design']/@ownedRepresentations[name='Entities']/@additionalLayers[name='Validation']"/>
diff --git a/subprojects/language-model/src/main/resources/model/problem.ecore b/subprojects/language-model/src/main/resources/model/problem.ecore
index 4ef023c1..3214da65 100644
--- a/subprojects/language-model/src/main/resources/model/problem.ecore
+++ b/subprojects/language-model/src/main/resources/model/problem.ecore
@@ -7,63 +7,54 @@
     <eStructuralFeatures xsi:type="ecore:EReference" name="statements" upperBound="-1"
         eType="#//Statement" containment="true"/>
   </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="Relation" abstract="true" eSuperTypes="#//NamedElement"/>
-  <eClassifiers xsi:type="ecore:EClass" name="ClassDeclaration" eSuperTypes="#//Relation #//Statement">
+  <eClassifiers xsi:type="ecore:EClass" name="ClassDeclaration" eSuperTypes="#//Statement #//Relation">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="abstract" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"/>
-    <eStructuralFeatures xsi:type="ecore:EReference" name="superTypes" upperBound="-1"
-        eType="#//Relation"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="referenceDeclarations"
         upperBound="-1" eType="#//ReferenceDeclaration" containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="newNode" eType="#//Node"
         transient="true" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="superTypes" upperBound="-1"
+        eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="ReferenceDeclaration" eSuperTypes="#//Relation">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="referenceType" eType="#//Relation"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="opposite" eType="#//ReferenceDeclaration"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="multiplicity" eType="#//Multiplicity"
         containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="kind" eType="#//ReferenceKind"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="referenceType" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="NamedElement" abstract="true">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="name" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
   </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="PredicateDefinition" eSuperTypes="#//Relation #//ParametricDefinition">
+  <eClassifiers xsi:type="ecore:EClass" name="PredicateDefinition" eSuperTypes="#//ParametricDefinition #//Relation">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="kind" eType="#//PredicateKind"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="bodies" upperBound="-1"
+        eType="#//Conjunction" containment="true"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Parameter" eSuperTypes="#//Variable">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="parameterType" eType="#//Relation"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="modality" eType="#//Modality"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="parameterType" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Variable" abstract="true" eSuperTypes="#//VariableOrNode"/>
-  <eClassifiers xsi:type="ecore:EClass" name="Conjunction" eSuperTypes="#//ExistentialQuantifier">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="literals" upperBound="-1"
-        eType="#//Literal" containment="true"/>
-  </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="Literal" abstract="true">
-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="modality" eType="#//Modality"/>
-  </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="Atom" eSuperTypes="#//Literal">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="relation" eType="#//Relation"/>
+  <eClassifiers xsi:type="ecore:EClass" name="Atom" eSuperTypes="#//Expr">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="transitiveClosure" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="arguments" upperBound="-1"
-        eType="#//Argument" containment="true"/>
+        eType="#//Expr" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="relation" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="ImplicitVariable" eSuperTypes="#//Variable"/>
-  <eClassifiers xsi:type="ecore:EClass" name="CompoundLiteral" abstract="true" eSuperTypes="#//ExistentialQuantifier #//Literal">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="atom" eType="#//Atom" containment="true"/>
-  </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="ExistentialQuantifier" abstract="true"
       interface="true">
     <eStructuralFeatures xsi:type="ecore:EReference" name="implicitVariables" upperBound="-1"
         eType="#//ImplicitVariable" transient="true" containment="true"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Assertion" eSuperTypes="#//Statement">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="relation" eType="#//Relation"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="value" eType="#//LogicValue"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="arguments" upperBound="-1"
         eType="#//AssertionArgument" containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="default" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"
         defaultValueLiteral="false"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="relation" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Node" eSuperTypes="#//VariableOrNode"/>
   <eClassifiers xsi:type="ecore:EEnum" name="LogicValue">
@@ -78,10 +69,10 @@
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Statement" abstract="true" interface="true"/>
   <eClassifiers xsi:type="ecore:EClass" name="TypeScope">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="targetType" eType="#//Relation"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="increment" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="multiplicity" eType="#//Multiplicity"
         containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="targetType" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Multiplicity" abstract="true"/>
   <eClassifiers xsi:type="ecore:EClass" name="RangeMultiplicity" eSuperTypes="#//Multiplicity">
@@ -95,12 +86,7 @@
         defaultValueLiteral="1"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="UnboundedMultiplicity" eSuperTypes="#//Multiplicity"/>
-  <eClassifiers xsi:type="ecore:EClass" name="VariableOrNodeArgument" eSuperTypes="#//Argument">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="variableOrNode" eType="#//VariableOrNode"/>
-    <eStructuralFeatures xsi:type="ecore:EReference" name="singletonVariable" eType="#//ImplicitVariable"
-        transient="true" containment="true"/>
-  </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="EnumDeclaration" eSuperTypes="#//Relation #//Statement">
+  <eClassifiers xsi:type="ecore:EClass" name="EnumDeclaration" eSuperTypes="#//Statement #//Relation">
     <eStructuralFeatures xsi:type="ecore:EReference" name="literals" upperBound="-1"
         eType="#//Node" containment="true"/>
   </eClassifiers>
@@ -117,11 +103,6 @@
   <eClassifiers xsi:type="ecore:EClass" name="StringConstant" eSuperTypes="#//Constant">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="stringValue" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
   </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="ConstantArgument" eSuperTypes="#//Argument">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="constant" eType="#//Constant"
-        containment="true"/>
-  </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="Argument" abstract="true"/>
   <eClassifiers xsi:type="ecore:EClass" name="NodeAssertionArgument" eSuperTypes="#//AssertionArgument">
     <eStructuralFeatures xsi:type="ecore:EReference" name="node" eType="#//Node"/>
   </eClassifiers>
@@ -130,6 +111,7 @@
     <eStructuralFeatures xsi:type="ecore:EReference" name="constant" eType="#//Constant"
         containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="node" eType="#//Node" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="negative" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="NodeValueAssertion" eSuperTypes="#//Statement">
     <eStructuralFeatures xsi:type="ecore:EReference" name="node" eType="#//Node"/>
@@ -143,14 +125,14 @@
   <eClassifiers xsi:type="ecore:EClass" name="WildcardAssertionArgument" eSuperTypes="#//AssertionArgument"/>
   <eClassifiers xsi:type="ecore:EClass" name="ParametricDefinition" abstract="true"
       interface="true" eSuperTypes="#//Statement">
-    <eStructuralFeatures xsi:type="ecore:EReference" name="bodies" upperBound="-1"
-        eType="#//Conjunction" containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="parameters" upperBound="-1"
         eType="#//Parameter" containment="true"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="RuleDefinition" eSuperTypes="#//ParametricDefinition #//NamedElement">
     <eStructuralFeatures xsi:type="ecore:EReference" name="consequents" upperBound="-1"
         eType="#//Consequent" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="preconditions" upperBound="-1"
+        eType="#//Conjunction" containment="true"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Consequent">
     <eStructuralFeatures xsi:type="ecore:EReference" name="actions" upperBound="-1"
@@ -174,17 +156,11 @@
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="NewVariable" eSuperTypes="#//Variable"/>
   <eClassifiers xsi:type="ecore:EEnum" name="Modality">
-    <eLiterals name="DEFAULT"/>
-    <eLiterals name="MAY" value="1"/>
-    <eLiterals name="MUST" value="2"/>
+    <eLiterals name="DEFAULT" value="1"/>
+    <eLiterals name="MAY" value="2"/>
+    <eLiterals name="MUST" value="3"/>
     <eLiterals name="CURRENT" value="3"/>
   </eClassifiers>
-  <eClassifiers xsi:type="ecore:EClass" name="NegativeLiteral" eSuperTypes="#//CompoundLiteral"/>
-  <eClassifiers xsi:type="ecore:EClass" name="CountLiteral" eSuperTypes="#//CompoundLiteral">
-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="op" eType="#//ComparisonOp"/>
-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="threshold" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EInt"
-        defaultValueLiteral="0"/>
-  </eClassifiers>
   <eClassifiers xsi:type="ecore:EEnum" name="ComparisonOp">
     <eLiterals name="LESS"/>
     <eLiterals name="LESS_EQ" value="1"/>
@@ -205,4 +181,79 @@
     <eLiterals name="CONTAINED" value="2"/>
     <eLiterals name="CONTAINMENT" value="3"/>
   </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="Expr" abstract="true"/>
+  <eClassifiers xsi:type="ecore:EClass" name="VariableOrNodeExpr" eSuperTypes="#//Expr">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="variableOrNode" eType="#//VariableOrNode"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="singletonVariable" eType="#//ImplicitVariable"
+        containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="BinaryExpr" abstract="true" eSuperTypes="#//Expr">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="left" eType="#//Expr" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="right" eType="#//Expr"
+        containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="UnaryExpr" abstract="true" eSuperTypes="#//Expr">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="body" eType="#//Expr" containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EEnum" name="UnaryOp">
+    <eLiterals name="PLUS"/>
+    <eLiterals name="MINUS" value="1"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EEnum" name="BinaryOp">
+    <eLiterals name="ADD"/>
+    <eLiterals name="SUB" value="1"/>
+    <eLiterals name="MUL" value="2"/>
+    <eLiterals name="DIV" value="3"/>
+    <eLiterals name="POW" value="4"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="ArithmeticUnaryExpr" eSuperTypes="#//UnaryExpr">
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="op" eType="#//UnaryOp"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="AggregationExpr" eSuperTypes="#//Expr #//ExistentialQuantifier">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="value" eType="#//Expr"
+        containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="condition" eType="#//Expr"
+        containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="op" eType="#//AggregationOp"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EEnum" name="AggregationOp">
+    <eLiterals name="SUM"/>
+    <eLiterals name="PROD" value="1"/>
+    <eLiterals name="MIN" value="2"/>
+    <eLiterals name="MAX" value="3"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="ComparisonExpr" eSuperTypes="#//BinaryExpr">
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="op" eType="#//ComparisonOp"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="ConstantExpr" eSuperTypes="#//Expr">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="constant" eType="#//Constant"
+        containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="QuantifiedUnaryExpr" abstract="true"
+      eSuperTypes="#//ExistentialQuantifier #//UnaryExpr"/>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionDefinition" eSuperTypes="#//ParametricDefinition #//Relation">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="cases" upperBound="-1"
+        eType="#//Case" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="functionType" eType="#//Relation"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="Case" abstract="true"/>
+  <eClassifiers xsi:type="ecore:EClass" name="Conjunction" eSuperTypes="#//Case #//ExistentialQuantifier">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="literals" upperBound="-1"
+        eType="#//Expr" containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="Match" eSuperTypes="#//Case">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="condition" eType="#//Conjunction"
+        containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="value" eType="#//Expr"
+        containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="ArithmeticBinaryExpr" eSuperTypes="#//BinaryExpr">
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="op" eType="#//BinaryOp"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="NegationExpr" eSuperTypes="#//QuantifiedUnaryExpr"/>
+  <eClassifiers xsi:type="ecore:EClass" name="CountExpr" eSuperTypes="#//QuantifiedUnaryExpr"/>
+  <eClassifiers xsi:type="ecore:EClass" name="Relation" abstract="true" eSuperTypes="#//NamedElement"/>
+  <eClassifiers xsi:type="ecore:EClass" name="ModalExpr" eSuperTypes="#//UnaryExpr">
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="modality" eType="#//Modality"/>
+  </eClassifiers>
 </ecore:EPackage>
diff --git a/subprojects/language-model/src/main/resources/model/problem.genmodel b/subprojects/language-model/src/main/resources/model/problem.genmodel
index 9ff4989b..230f9919 100644
--- a/subprojects/language-model/src/main/resources/model/problem.genmodel
+++ b/subprojects/language-model/src/main/resources/model/problem.genmodel
@@ -42,57 +42,65 @@
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/CONTAINED"/>
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/CONTAINMENT"/>
     </genEnums>
+    <genEnums typeSafeEnumCompatible="false" ecoreEnum="problem.ecore#//UnaryOp">
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//UnaryOp/PLUS"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//UnaryOp/MINUS"/>
+    </genEnums>
+    <genEnums typeSafeEnumCompatible="false" ecoreEnum="problem.ecore#//BinaryOp">
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//BinaryOp/ADD"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//BinaryOp/SUB"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//BinaryOp/MUL"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//BinaryOp/DIV"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//BinaryOp/POW"/>
+    </genEnums>
+    <genEnums typeSafeEnumCompatible="false" ecoreEnum="problem.ecore#//AggregationOp">
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//AggregationOp/SUM"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//AggregationOp/PROD"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//AggregationOp/MIN"/>
+      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//AggregationOp/MAX"/>
+    </genEnums>
     <genClasses ecoreClass="problem.ecore#//Problem">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//Problem/nodes"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//Problem/statements"/>
     </genClasses>
-    <genClasses ecoreClass="problem.ecore#//Relation"/>
     <genClasses ecoreClass="problem.ecore#//ClassDeclaration">
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ClassDeclaration/abstract"/>
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ClassDeclaration/superTypes"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ClassDeclaration/referenceDeclarations"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ClassDeclaration/newNode"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ClassDeclaration/superTypes"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//ReferenceDeclaration">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/referenceType"/>
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/opposite"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/multiplicity"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ReferenceDeclaration/kind"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/referenceType"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//NamedElement">
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//NamedElement/name"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//PredicateDefinition">
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//PredicateDefinition/kind"/>
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//PredicateDefinition/bodies"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Parameter">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Parameter/parameterType"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Parameter/modality"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Parameter/parameterType"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Variable"/>
-    <genClasses ecoreClass="problem.ecore#//Conjunction">
-      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//Conjunction/literals"/>
-    </genClasses>
-    <genClasses ecoreClass="problem.ecore#//Literal">
-      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Literal/modality"/>
-    </genClasses>
     <genClasses ecoreClass="problem.ecore#//Atom">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Atom/relation"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Atom/transitiveClosure"/>
       <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Atom/arguments"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Atom/relation"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//ImplicitVariable"/>
-    <genClasses ecoreClass="problem.ecore#//CompoundLiteral">
-      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//CompoundLiteral/atom"/>
-    </genClasses>
     <genClasses ecoreClass="problem.ecore#//ExistentialQuantifier">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ExistentialQuantifier/implicitVariables"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Assertion">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Assertion/relation"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Assertion/value"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//Assertion/arguments"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Assertion/default"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Assertion/relation"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Node"/>
     <genClasses ecoreClass="problem.ecore#//ScopeDeclaration">
@@ -100,9 +108,9 @@
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Statement"/>
     <genClasses ecoreClass="problem.ecore#//TypeScope">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//TypeScope/targetType"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//TypeScope/increment"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//TypeScope/multiplicity"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//TypeScope/targetType"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Multiplicity"/>
     <genClasses ecoreClass="problem.ecore#//RangeMultiplicity">
@@ -113,10 +121,6 @@
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ExactMultiplicity/exactValue"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//UnboundedMultiplicity"/>
-    <genClasses ecoreClass="problem.ecore#//VariableOrNodeArgument">
-      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//VariableOrNodeArgument/variableOrNode"/>
-      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//VariableOrNodeArgument/singletonVariable"/>
-    </genClasses>
     <genClasses ecoreClass="problem.ecore#//EnumDeclaration">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//EnumDeclaration/literals"/>
     </genClasses>
@@ -131,10 +135,6 @@
     <genClasses ecoreClass="problem.ecore#//StringConstant">
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//StringConstant/stringValue"/>
     </genClasses>
-    <genClasses ecoreClass="problem.ecore#//ConstantArgument">
-      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ConstantArgument/constant"/>
-    </genClasses>
-    <genClasses ecoreClass="problem.ecore#//Argument"/>
     <genClasses ecoreClass="problem.ecore#//NodeAssertionArgument">
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//NodeAssertionArgument/node"/>
     </genClasses>
@@ -142,6 +142,7 @@
     <genClasses ecoreClass="problem.ecore#//ConstantAssertionArgument">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ConstantAssertionArgument/constant"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ConstantAssertionArgument/node"/>
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ConstantAssertionArgument/negative"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//NodeValueAssertion">
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//NodeValueAssertion/node"/>
@@ -152,11 +153,11 @@
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//WildcardAssertionArgument"/>
     <genClasses ecoreClass="problem.ecore#//ParametricDefinition">
-      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ParametricDefinition/bodies"/>
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ParametricDefinition/parameters"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//RuleDefinition">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//RuleDefinition/consequents"/>
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//RuleDefinition/preconditions"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Consequent">
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//Consequent/actions"/>
@@ -175,10 +176,53 @@
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//NewAction/parent"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//NewVariable"/>
-    <genClasses ecoreClass="problem.ecore#//NegativeLiteral"/>
-    <genClasses ecoreClass="problem.ecore#//CountLiteral">
-      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//CountLiteral/op"/>
-      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//CountLiteral/threshold"/>
+    <genClasses ecoreClass="problem.ecore#//Expr"/>
+    <genClasses ecoreClass="problem.ecore#//VariableOrNodeExpr">
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//VariableOrNodeExpr/variableOrNode"/>
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//VariableOrNodeExpr/singletonVariable"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//BinaryExpr">
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//BinaryExpr/left"/>
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//BinaryExpr/right"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//UnaryExpr">
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//UnaryExpr/body"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//ArithmeticUnaryExpr">
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ArithmeticUnaryExpr/op"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//AggregationExpr">
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//AggregationExpr/value"/>
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//AggregationExpr/condition"/>
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//AggregationExpr/op"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//ComparisonExpr">
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ComparisonExpr/op"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//ConstantExpr">
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ConstantExpr/constant"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//QuantifiedUnaryExpr"/>
+    <genClasses ecoreClass="problem.ecore#//FunctionDefinition">
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//FunctionDefinition/cases"/>
+      <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//FunctionDefinition/functionType"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//Case"/>
+    <genClasses ecoreClass="problem.ecore#//Conjunction">
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Conjunction/literals"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//Match">
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Match/condition"/>
+      <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Match/value"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//ArithmeticBinaryExpr">
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ArithmeticBinaryExpr/op"/>
+    </genClasses>
+    <genClasses ecoreClass="problem.ecore#//NegationExpr"/>
+    <genClasses ecoreClass="problem.ecore#//CountExpr"/>
+    <genClasses ecoreClass="problem.ecore#//Relation"/>
+    <genClasses ecoreClass="problem.ecore#//ModalExpr">
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ModalExpr/modality"/>
     </genClasses>
   </genPackages>
 </genmodel:GenModel>
-- 
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