Add parameter noise variance

src/main/grammars/de/monticore/lang/monticar/CNNTrain.mc4

@@ -179,6 +179,8 @@ grammar CNNTrain extends de.monticore.lang.monticar.Common2, de.monticore.Number
     interface StrategyGaussianEntry extends Entry;
     StrategyGaussianValue implements StrategyValue = name:"gaussian" ("{" params:StrategyGaussianEntry* "}")?;
 
+    StrategyGaussianNoiseVarianceEntry implements StrategyGaussianEntry = name: "noise_variance" ":" value:NumberValue;
+
     StrategyOUMu implements StrategyOrnsteinUhlenbeckEntry = name: "mu" ":" value:DoubleVectorValue;
     StrategyOUTheta implements StrategyOrnsteinUhlenbeckEntry = name: "theta" ":" value:DoubleVectorValue;
     StrategyOUSigma implements StrategyOrnsteinUhlenbeckEntry = name: "sigma" ":" value:DoubleVectorValue;

src/main/java/de/monticore/lang/monticar/cnntrain/_cocos/ParameterAlgorithmMapping.java

@@ -105,7 +105,8 @@ class ParameterAlgorithmMapping {
         ASTCriticOptimizerEntry.class,
         ASTStrategyOUMu.class,
         ASTStrategyOUTheta.class,
-        ASTStrategyOUSigma.class
+        ASTStrategyOUSigma.class,
+        ASTStrategyGaussianNoiseVarianceEntry.class
     );
 
     private static final List<Class> EXCLUSIVE_TD3_PARAMETERS = Lists.newArrayList(
@@ -117,7 +118,8 @@ class ParameterAlgorithmMapping {
         ASTStrategyOUSigma.class,
         ASTPolicyNoiseEntry.class,
         ASTNoiseClipEntry.class,
-        ASTPolicyDelayEntry.class
+        ASTPolicyDelayEntry.class,
+        ASTStrategyGaussianNoiseVarianceEntry.class
     );
 
     ParameterAlgorithmMapping() {

src/main/java/de/monticore/lang/monticar/cnntrain/_symboltable/CNNTrainSymbolTableCreator.java

@@ -532,6 +532,14 @@ public class CNNTrainSymbolTableCreator extends CNNTrainSymbolTableCreatorTOP {
         configuration.getEntryMap().put(node.getName(), entry);
     }
 
+    @Override
+    public void visit(ASTStrategyGaussianNoiseVarianceEntry node) {
+        EntrySymbol entry = new EntrySymbol(node.getName());
+        entry.setValue(getValueSymbolForDouble(node.getValue()));
+        addToScopeAndLinkWithNode(entry, node);
+        configuration.getEntryMap().put(node.getName(), entry);
+    }
+
     @Override
     public void visit(ASTPolicyDelayEntry node) {
         EntrySymbol entry = new EntrySymbol(node.getName());

src/test/resources/valid_tests/TD3Config.cnnt

@@ -23,6 +23,7 @@ configuration TD3Config {
     strategy : gaussian {
         epsilon: 1.0
         min_epsilon: 0.001
+        noise_variance: 0.5
         epsilon_decay_per_step: true
         epsilon_decay_method: linear
         epsilon_decay : 0.0001