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digitalmars.D - Which exception

reply Tom <tom nospam.com> writes:
Hey,

lets say I have something like the following:

try {
	// Code that throws some exception I don't know of.
} catch (Exception ex) {
	writefln(ex.classinfo.name); // works but it's not what I need
}

Is there some way to get the name of the class 'ex' is instance of (the 
derived class and not the base class)?

Thanks in advance,
--
Tom;
Oct 29 2006
parent reply Frits van Bommel <fvbommel REMwOVExCAPSs.nl> writes:
Tom wrote:

 Hey,
 
 lets say I have something like the following:
 
 try {
     // Code that throws some exception I don't know of.
 } catch (Exception ex) {
     writefln(ex.classinfo.name); // works but it's not what I need
 }
 
 Is there some way to get the name of the class 'ex' is instance of (the 
 derived class and not the base class)?


I'm sorry, but what *is* it that you need if not the above?

     import std.stdio;

     class DerivedException : Exception { this() { super(""); } }

     void main() {
         try {
             // Code that throws some exception.
             throw new DerivedException;
         } catch (Exception ex) {
             writefln(ex.classinfo.name); // writes "DerivedException"
         }
     }

The above code writes "DerivedException" to stdout, which is the name of 
the most derived class ex is an instance of.

Am I missing something?
Oct 29 2006
parent reply Tom <tom nospam.com> writes:
== Quote from Frits van Bommel (fvbommel REMwOVExCAPSs.nl)'s article

 Tom wrote:

 Hey,

 lets say I have something like the following:

 try {
     // Code that throws some exception I don't know of.
 } catch (Exception ex) {
     writefln(ex.classinfo.name); // works but it's not what I need
 }

 Is there some way to get the name of the class 'ex' is instance of (the
 derived class and not the base class)?


 I'm sorry, but what *is* it that you need if not the above?
      import std.stdio;
      class DerivedException : Exception { this() { super(""); } }
      void main() {
          try {
              // Code that throws some exception.
              throw new DerivedException;
          } catch (Exception ex) {
              writefln(ex.classinfo.name); // writes "DerivedException"
          }
      }
 The above code writes "DerivedException" to stdout, which is the name of
 the most derived class ex is an instance of.
 Am I missing something?


No, you're right. It works here, on a WinXP machine. When I get home later, I'll
test it on my Linux, where it didn't work. I hope it's only my mistake and not a
linux-specific bug.

Regards,
--
Tom;
Oct 30 2006
parent reply Frits van Bommel <fvbommel REMwOVExCAPSs.nl> writes:
Tom wrote:

 == Quote from Frits van Bommel (fvbommel REMwOVExCAPSs.nl)'s article


[...]

 The above code writes "DerivedException" to stdout, which is the name of
 the most derived class ex is an instance of.
 Am I missing something?


 
 No, you're right. It works here, on a WinXP machine. When I get home later,
I'll
 test it on my Linux, where it didn't work. I hope it's only my mistake and not
a
 linux-specific bug.


Just tried it in my VMWare window:

     urxae ubuntu:~/tmp$ cat test.d
     import std.stdio;

     class DerivedException : Exception { this() { super(""); } }

     void main() {
         try {
             // Code that throws some exception.
             throw new DerivedException;
         } catch (Exception ex) {
             writefln(ex.classinfo.name); // writes "DerivedException"
         }
     }
     urxae ubuntu:~/tmp$ dmd -run test.d
     DerivedException
     urxae ubuntu:~/tmp$ uname -a

GNU/Linux

So that's not it either.
Oct 30 2006
parent Tom <tom nospam.com> writes:
Frits van Bommel wrote:

 Tom wrote:

 == Quote from Frits van Bommel (fvbommel REMwOVExCAPSs.nl)'s article


 [...]

 The above code writes "DerivedException" to stdout, which is the name of
 the most derived class ex is an instance of.
 Am I missing something?


 No, you're right. It works here, on a WinXP machine. When I get home 
 later, I'll
 test it on my Linux, where it didn't work. I hope it's only my mistake 
 and not a
 linux-specific bug.


 
 Just tried it in my VMWare window:
 
     urxae ubuntu:~/tmp$ cat test.d
     import std.stdio;
 
     class DerivedException : Exception { this() { super(""); } }
 
     void main() {
         try {
             // Code that throws some exception.
             throw new DerivedException;
         } catch (Exception ex) {
             writefln(ex.classinfo.name); // writes "DerivedException"
         }
     }
     urxae ubuntu:~/tmp$ dmd -run test.d
     DerivedException
     urxae ubuntu:~/tmp$ uname -a

 GNU/Linux
 
 So that's not it either.


Shit! the same here. I could swear that yesterday I had code that failed 
to perform correctly on the topic. Today I can't reproduce it, shame on 
me (maybe I'm hallucinating). It'll have to be next time (hope not) :(

Thanks anyway!
--
Tom;
Oct 30 2006