/// <summary>
/// Finds the matching nodes of a <see cref="IEntityExpression"/>.
/// </summary>
/// <param name="node">The agent expression to check.</param>
/// <param name="errorList">The list of errors found.</param>
/// <param name="resolvedResult">The expression result types upon return.</param>
/// <param name="resolvedException">Exceptions the expression can throw upon return.</param>
/// <param name="constantSourceList">Sources of the constant expression upon return, if any.</param>
/// <param name="expressionConstant">The expression constant upon return.</param>
/// <param name="resolvedFinalFeature">The feature if the end of the path is a feature.</param>
/// <param name="resolvedFinalDiscrete">The discrete if the end of the path is a discrete.</param>
public static bool ResolveCompilerReferences(IEntityExpression node, IErrorList errorList, out IResultType resolvedResult, out IResultException resolvedException, out ISealableList <IExpression> constantSourceList, out ILanguageConstant expressionConstant, out ICompiledFeature resolvedFinalFeature, out IDiscrete resolvedFinalDiscrete)
{
resolvedResult = null;
resolvedException = null;
constantSourceList = new SealableList <IExpression>();
expressionConstant = NeutralLanguageConstant.NotConstant;
resolvedFinalFeature = null;
resolvedFinalDiscrete = null;
IQualifiedName Query = (IQualifiedName)node.Query;
IClass EmbeddingClass = (Class)node.EmbeddingClass;
IClassType BaseType = EmbeddingClass.ResolvedClassType.Item;
if (!Expression.IsLanguageTypeAvailable(LanguageClasses.Entity.Guid, node, out ITypeName ResultTypeName, out ICompiledType ResultType))
{
errorList.AddError(new ErrorEntityTypeMissing(node));
return(false);
}
IList <IIdentifier> ValidPath = Query.ValidPath.Item;
IIdentifier LastIdentifier = ValidPath[ValidPath.Count - 1];
string ValidText = LastIdentifier.ValidText.Item;
ISealableDictionary <string, IScopeAttributeFeature> LocalScope = Scope.CurrentScope(node);
if (!ObjectType.GetQualifiedPathFinalType(EmbeddingClass, BaseType, LocalScope, ValidPath, 0, errorList, out ICompiledFeature FinalFeature, out IDiscrete FinalDiscrete, out ITypeName FinalTypeName, out ICompiledType FinalType, out bool InheritBySideAttribute))
{
return(false);
}
Guid EntityGuid;
if (FinalFeature is IFeatureWithEntity AsFeatureWithEntity)
{
ObjectType.FillResultPath(EmbeddingClass, BaseType, LocalScope, ValidPath, 0, Query.ValidResultTypePath.Item);
resolvedFinalFeature = FinalFeature;
EntityGuid = AsFeatureWithEntity.EntityGuid;
expressionConstant = new EntityLanguageConstant(AsFeatureWithEntity);
}
else
{
Debug.Assert(FinalDiscrete != null);
resolvedFinalDiscrete = FinalDiscrete;
EntityGuid = LanguageClasses.NamedFeatureEntity.Guid;
expressionConstant = new EntityLanguageConstant(resolvedFinalDiscrete);
}
ITypeName EntityTypeName = EmbeddingClass.ImportedLanguageTypeTable[EntityGuid].Item1;
ICompiledType EntityType = EmbeddingClass.ImportedLanguageTypeTable[EntityGuid].Item2;
resolvedResult = new ResultType(EntityTypeName, EntityType, ValidText);
resolvedException = new ResultException();
#if COVERAGE
Debug.Assert(!node.IsComplex);
#endif
return(true);
}
/// <summary>
/// Finds the matching nodes of a <see cref="IKeywordEntityExpression"/>.
/// </summary>
/// <param name="node">The agent expression to check.</param>
/// <param name="errorList">The list of errors found.</param>
/// <param name="resolvedResult">The expression result types upon return.</param>
/// <param name="resolvedException">Exceptions the expression can throw upon return.</param>
/// <param name="constantSourceList">Sources of the constant expression upon return, if any.</param>
/// <param name="expressionConstant">The expression constant upon return.</param>
/// <param name="resolvedFinalFeature">The feature if the end of the path is a feature.</param>
public static bool ResolveCompilerReferences(IKeywordEntityExpression node, IErrorList errorList, out IResultType resolvedResult, out IResultException resolvedException, out ISealableList <IExpression> constantSourceList, out ILanguageConstant expressionConstant, out ICompiledFeature resolvedFinalFeature)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
if (errorList == null)
{
throw new ArgumentNullException(nameof(errorList));
}
resolvedResult = null;
resolvedException = null;
constantSourceList = new SealableList <IExpression>();
expressionConstant = NeutralLanguageConstant.NotConstant;
resolvedFinalFeature = null;
IClass EmbeddingClass = node.EmbeddingClass;
BaseNode.Keyword Value = node.Value;
if (!Expression.IsLanguageTypeAvailable(LanguageClasses.Entity.Guid, node, out ITypeName ResultTypeName, out ICompiledType ResultType))
{
errorList.AddError(new ErrorEntityTypeMissing(node));
return(false);
}
Guid EntityGuid = Guid.Empty;
switch (node.Value)
{
case BaseNode.Keyword.Indexer:
if (EmbeddingClass.ClassIndexer.IsAssigned)
{
IIndexerFeature ClassIndexer = EmbeddingClass.ClassIndexer.Item;
resolvedFinalFeature = ClassIndexer;
EntityGuid = ClassIndexer.EntityGuid;
expressionConstant = new EntityLanguageConstant(ClassIndexer);
}
else
{
errorList.AddError(new ErrorMissingIndexer(node));
return(false);
}
break;
default:
errorList.AddError(new ErrorInvalidExpression(node));
return(false);
}
Debug.Assert(EntityGuid != Guid.Empty);
ITypeName EntityTypeName = EmbeddingClass.ImportedLanguageTypeTable[EntityGuid].Item1;
ICompiledType EntityType = EmbeddingClass.ImportedLanguageTypeTable[EntityGuid].Item2;
resolvedResult = new ResultType(EntityTypeName, EntityType, string.Empty);
resolvedException = new ResultException();
#if COVERAGE
Debug.Assert(!node.IsComplex);
#endif
return(true);
}
