void openFile(string fname, string current_folder)
{
	auto file = readText(current_folder ~ fname);
	scope(failure)
	{
		writeln("failure");
	}

//	writeln(file);

}

if file name do not exists, I want to rise scope exception. But it's do not rise, and I am getting only standard error like:

std.file.FileException@std\file.d(191): D:\code\d\App1\source\app.d1: ╨Э╨╡ ╤Г╨┤╨
░╨╡╤В╤Б╤П ╨╜╨░╨╣╤В╨╕ ╤Г╨║╨░╨╖╨░╨╜╨╜╤Л╨╣ ╤Д╨░╨╣╨╗.
----------------

what's wrong? if I use block "success" it's work fine.

I can't understand what I am missing. Try-catch block also do not handle exception:

void main()
{
	string fname = "app.d1"; //file name with error
	string current_folder = (getcwd() ~"\\");
	writeln(current_folder);
	openFile(fname, current_folder);
}

void openFile(string fname, string current_folder)
{
		try
		{
			auto file = readText(current_folder ~ fname);
			if(exists(current_folder ~ fname))
			scope(success)
				writeln("success");
		}

		catch(Exception e)
		{
			writeln(e); //what class of error I am handling? any?
		}

	
}

On Wednesday, 5 November 2014 at 12:56:41 UTC, Suliman wrote:
> void openFile(string fname, string current_folder)
> {
> 	auto file = readText(current_folder ~ fname);
> 	scope(failure)
> 	{
> 		writeln("failure");
> 	}
>
> //	writeln(file);
>
> }
>
> if file name do not exists, I want to rise scope exception. But it's do not rise, and I am getting only standard error like:
>
> std.file.FileException@std\file.d(191): D:\code\d\App1\source\app.d1: ╨Э╨╡ ╤Г╨┤╨
> ░╨╡╤В╤Б╤П ╨╜╨░╨╣╤В╨╕ ╤Г╨║╨░╨╖╨░╨╜╨╜╤Л╨╣ ╤Д╨░╨╣╨╗.
> ----------------
>
> what's wrong? if I use block "success" it's work fine.

Try:
--------
scope(failure){writeln("failure");}
auto file = readText(current_folder ~ fname);
--------

The scope(failure) is translated to a try catch after the satement you wann monitor.
So put it before

On Wednesday, 5 November 2014 at 14:04:26 UTC, MadProgressor wrote:
> The scope(failure) is translated to a try catch after the satement you wann monitor.
> So put it before

That shouldn't matter. See: http://dlang.org/exception-safe.html

On Wed, 05 Nov 2014 14:09:20 +0000
Gary Willoughby via Digitalmars-d-learn
<digitalmars-d-learn@puremagic.com> wrote:

> That shouldn't matter. See: http://dlang.org/exception-safe.html
this indeed matter. and it should.

Am I right understand that keyword "Exception" is handle universal type of exceptions?

	catch (Exception)
	{
		writeln("inner");
	}

But in my example with try block can I change it's to something more informative?

On 11/05/2014 06:01 AM, Suliman wrote:

> I can't understand what I am missing. Try-catch block also do not handle
> exception:

I does. This turned out to be very tricky for me. :)

> void main()
> {
>      string fname = "app.d1"; //file name with error
>      string current_folder = (getcwd() ~"\\");
>      writeln(current_folder);
>      openFile(fname, current_folder);
> }
>
> void openFile(string fname, string current_folder)
> {
>          try
>          {
>              auto file = readText(current_folder ~ fname);
>              if(exists(current_folder ~ fname))
>              scope(success)
>                  writeln("success");

Unrelated to the problem, but did you really want that scope(success) under the if statement?

>          }
>
>          catch(Exception e)
>          {
>              writeln(e); //what class of error I am handling? any?
>          }

Replace that with something like writeln("caught") and you will see that it is indeed caught. :) Printing the exception mimicks the default behavior and you (and I) think that the exception is not caught. :)

Ali

> Replace that with something like writeln("caught") and you will see that it is indeed caught. :) Printing the exception mimicks the default behavior and you (and I) think that the exception is not caught. :)

that's work, but I can not understand where I can to look at exception level. If I right understand every function have own exceptions. For example std.file.
Where I could look at what "e" will get? I mean "catch(Exception e)".

On 11/05/2014 11:02 PM, Suliman wrote:
>> Replace that with something like writeln("caught") and you will see
>> that it is indeed caught. :) Printing the exception mimicks the
>> default behavior and you (and I) think that the exception is not
>> caught. :)
>
> that's work, but I can not understand where I can to look at exception
> level. If I right understand every function have own exceptions. For
> example std.file.
> Where I could look at what "e" will get? I mean "catch(Exception e)".
>

We have to look at the documentation of the function. In this case the possibilities are FileException and UTFException.

  http://dlang.org/phobos/std_file.html#.readText

However, judging by their names, they are both descendants of Exception, so what you are doing will catch either of them.

Ali

> We have to look at the documentation of the function. In this case the possibilities are FileException and UTFException.
>
>   http://dlang.org/phobos/std_file.html#.readText
>
> However, judging by their names, they are both descendants of Exception, so what you are doing will catch either of them.
>

Where I can look at hierarchy of exceptions?