• dog2002 (19/19) Mar 08 2021 I want to call functions according to an exception. In C there is
• rikki cattermole (2/2) Mar 08 2021 https://github.com/dlang/phobos/blob/master/std/socket.d#L190
• Steven Schveighoffer (15/38) Mar 08 2021 In the case where you are actually looking to see what *type* the

dog2002 <742617000027 aaathats3as.com> writes:

I want to call functions according to an exception. In C there is 
the errno function. But if I use try...catch, it shows a trace or 
a message. How do I check an exception type? For example:

std.socket.SocketOSException std/socket.d(2857): Unable to 
connect socket: Connection refused
----------------
??:? [0x459ec5]
??:? [0x4646e6]
??:? [0x44743d]
??:? [0x42c833]
??:? [0x404273]
??:? [0x404cf8]
??:? [0x440a43]
??:? [0x7fdeccecc3f8]
??:? clone [0x7fdeccc98b52]

or

Unable to connect socket: Connection refused

So do I just need to check the exception string? Or there is 
something like errno in C?

rikki cattermole <rikki cattermole.co.nz> writes:

https://github.com/dlang/phobos/blob/master/std/socket.d#L190

Might be of some use to you

Steven Schveighoffer <schveiguy gmail.com> writes:

On 3/8/21 8:05 AM, dog2002 wrote:
 I want to call functions according to an exception. In C there is the 
 errno function. But if I use try...catch, it shows a trace or a message. 
 How do I check an exception type? For example:
 
 std.socket.SocketOSException std/socket.d(2857): Unable to connect 
 socket: Connection refused
 ----------------
 ??:? [0x459ec5]
 ??:? [0x4646e6]
 ??:? [0x44743d]
 ??:? [0x42c833]
 ??:? [0x404273]
 ??:? [0x404cf8]
 ??:? [0x440a43]
 ??:? [0x7fdeccecc3f8]
 ??:? clone [0x7fdeccc98b52]
 
 or
 
 Unable to connect socket: Connection refused
 
 So do I just need to check the exception string? Or there is something 
 like errno in C?

In the case where you are actually looking to see what *type* the 
exception is:

try {
    ... // socket code
}
catch(SocketException e)
{
    // it's a socket exception here
}
catch(Exception e)
{
    // otherwise, it's a different kind of exception
}

-Steve