internal override bool Validate(RuleValidation validation)
{
bool success = false;
if (exprStatement.Expression == null)
{
ValidationError error = new ValidationError(Messages.NullInvokeStatementExpression, ErrorNumbers.Error_ParameterNotSet);
error.UserData[RuleUserDataKeys.ErrorObject] = exprStatement;
validation.Errors.Add(error);
}
else if (exprStatement.Expression is CodeMethodInvokeExpression)
{
RuleExpressionInfo exprInfo = RuleExpressionWalker.Validate(validation, exprStatement.Expression, false);
success = (exprInfo != null);
}
else
{
ValidationError error = new ValidationError(Messages.InvokeNotHandled, ErrorNumbers.Error_CodeExpressionNotHandled);
error.UserData[RuleUserDataKeys.ErrorObject] = exprStatement;
validation.Errors.Add(error);
}
return(success);
}
internal override bool Validate(RuleValidation validation)
{
bool success = false;
string message;
RuleExpressionInfo lhsExprInfo = null;
if (assignStatement.Left == null)
{
ValidationError error = new ValidationError(Messages.NullAssignLeft, ErrorNumbers.Error_LeftOperandMissing);
error.UserData[RuleUserDataKeys.ErrorObject] = assignStatement;
validation.Errors.Add(error);
}
else
{
lhsExprInfo = validation.ExpressionInfo(assignStatement.Left);
if (lhsExprInfo == null)
{
lhsExprInfo = RuleExpressionWalker.Validate(validation, assignStatement.Left, true);
}
}
RuleExpressionInfo rhsExprInfo = null;
if (assignStatement.Right == null)
{
ValidationError error = new ValidationError(Messages.NullAssignRight, ErrorNumbers.Error_RightOperandMissing);
error.UserData[RuleUserDataKeys.ErrorObject] = assignStatement;
validation.Errors.Add(error);
}
else
{
rhsExprInfo = RuleExpressionWalker.Validate(validation, assignStatement.Right, false);
}
if (lhsExprInfo != null && rhsExprInfo != null)
{
Type expressionType = rhsExprInfo.ExpressionType;
Type assignmentType = lhsExprInfo.ExpressionType;
if (assignmentType == typeof(NullLiteral))
{
// Can't assign to a null literal.
ValidationError error = new ValidationError(Messages.NullAssignLeft, ErrorNumbers.Error_LeftOperandInvalidType);
error.UserData[RuleUserDataKeys.ErrorObject] = assignStatement;
validation.Errors.Add(error);
success = false;
}
else if (assignmentType == expressionType)
{
// Easy case, they're both the same type.
success = true;
}
else
{
// The types aren't the same, but it still might be a legal assignment.
if (!RuleValidation.TypesAreAssignable(expressionType, assignmentType, assignStatement.Right, out ValidationError error))
{
if (error == null)
{
message = string.Format(CultureInfo.CurrentCulture, Messages.AssignNotAllowed, RuleDecompiler.DecompileType(expressionType), RuleDecompiler.DecompileType(assignmentType));
error = new ValidationError(message, ErrorNumbers.Error_OperandTypesIncompatible);
}
error.UserData[RuleUserDataKeys.ErrorObject] = assignStatement;
validation.Errors.Add(error);
}
else
{
success = true;
}
}
}
return(success);
}