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Using KeyNotFoundException and exception patterns
NN--- edited this page Apr 18, 2012
·
3 revisions
- Category: Exceptions
- Description: Raising a 'KeyNotFoundException' exception, and using exception patterns
- Code:
using Nemerle;
using System;
using System.Console;
using System.IO;
using System.Collections.Generic;
try
{
WriteLine("About to raise an exception...");
match (DateTime.Now.DayOfWeek)
{
| DayOfWeek.Monday => throw KeyNotFoundException()
| _ => assert(false, "it's not Monday")
}
}
catch
{
| _ is KeyNotFoundException => WriteLine("Caught a 'KeyNotFoundException' exception, it must be Monday")
| x is AssertionException => WriteLine($"Caught a 'AssertionException' exception: $x")
}
- Execution Result (in case of Monday):
About to raise an exception...
Caught a 'KeyNotFoundException' exception, it must be Monday
- Execution Result (in other cases):
About to raise an exception...
Caught a 'AssertionException' exception: Nemerle.Core.AssertionException: assertion failed in file C:\Users\Alexander\AppData\Local\Temp\tmp373B.tmp, line 13: it's not Monday
в tmp373B.Main()
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