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An exception handler is used for a very generic exception type.
This checker controls if exception handlers might be incorrect. For instance, an exception handler with an empty body might be an unfinished snippet of code; an exception handler for a very generic exception type might end up catching too many exceptions, also some that were not meant to be caught there.
| Class Name | Generic Exception Handler (C#) | |||
|---|---|---|---|---|
| Significance | reliability | |||
| Mnemonic | CSHARP.STRUCT.EXCP.GEH | |||
| Categories |
|
|||
| Availability | Available for C# only. |
|||
| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Generic Exception Handler (C#)" |
Japanese (ja)
using System;
using System.IO;
namespace DocumentationExamples
{
public class ExceptionHandlers
{
public static void Main(string[] args)
{
StreamWriter fw = null;
try
{
fw = new StreamWriter(args[0]);
fw.Dispose();
}
catch (IndexOutOfRangeException e) { } // Empty Exception Handler (C#) warning issued here
catch (Exception e) // Generic Exception Handler (C#) warning issued here
{
Console.WriteLine("unusual");
}
}
}
}
The programmer could resolve these warnings as follows.
public static void Main(string[] args)
{
StreamWriter fw = null;
try
{
fw = new StreamWriter(args[0]);
fw.Dispose();
}
catch (IndexOutOfRangeException e) { // resolve "Empty Exception Handler (C#)" warning by printing a message to the user
Console.WriteLine("usage: Main filename");
}
catch (IOException e) // resolve "Generic Exception Handler (C#)" warning by catching IOException instead of Exception
{
Console.WriteLine("I/O error");
}
}
Add a body to the exception handler, or narrow to the exception types.
The following configuration file parameters affect checks for this warning class.