/// <summary>
/// Finds the matching nodes of a <see cref="IEqualityExpression"/>.
/// </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 constant value upon return, if any.</param>
public static bool ResolveCompilerReferences(IEqualityExpression node, IErrorList errorList, out IResultType resolvedResult, out IResultException resolvedException, out ISealableList <IExpression> constantSourceList, out ILanguageConstant expressionConstant)
{
resolvedResult = null;
resolvedException = null;
constantSourceList = new SealableList <IExpression>();
expressionConstant = NeutralLanguageConstant.NotConstant;
IExpression LeftExpression = (IExpression)node.LeftExpression;
IExpression RightExpression = (IExpression)node.RightExpression;
IClass EmbeddingClass = node.EmbeddingClass;
IResultType LeftResult = LeftExpression.ResolvedResult.Item;
IResultType RightResult = RightExpression.ResolvedResult.Item;
if (LeftResult.Count != RightResult.Count)
{
errorList.AddError(new ErrorExpressionResultMismatch(node));
return(false);
}
if (!Expression.IsLanguageTypeAvailable(LanguageClasses.Boolean.Guid, node, out ITypeName ResultTypeName, out ICompiledType ResultType))
{
errorList.AddError(new ErrorBooleanTypeMissing(node));
return(false);
}
if (LeftResult.Count > 1)
{
int MismatchingResultCount = 0;
foreach (IExpressionType LeftItem in LeftResult)
{
ICompiledType LeftExpressionType = LeftItem.ValueType;
bool MatchingNameFound = false;
foreach (IExpressionType RightItem in RightResult)
{
if (LeftItem.Name == RightItem.Name)
{
MatchingNameFound = true;
ICompiledType RightExpressionType = RightItem.ValueType;
if (!ObjectType.TypeConformToBase(LeftExpressionType, RightExpressionType, isConversionAllowed: true) && !ObjectType.TypeConformToBase(RightExpressionType, LeftExpressionType, isConversionAllowed: true))
{
MismatchingResultCount++;
}
break;
}
}
if (!MatchingNameFound)
{
MismatchingResultCount++;
}
}
if (MismatchingResultCount > 0)
{
errorList.AddError(new ErrorExpressionResultMismatch(node));
return(false);
}
}
resolvedResult = new ResultType(ResultTypeName, ResultType, string.Empty);
constantSourceList.Add(LeftExpression);
constantSourceList.Add(RightExpression);
resolvedException = new ResultException();
ResultException.Merge(resolvedException, LeftExpression.ResolvedException);
ResultException.Merge(resolvedException, RightExpression.ResolvedException);
#if COVERAGE
Debug.Assert(node.IsComplex);
#endif
return(true);
}
