CODEWITHSUNDEEP
c++exception
jiafu
jiafu

Reputation: 6546

what's meaning for catch(exception) in c++ exception?

there are 3 types of exception:

(1) pointer

catch(exception* e){
}

(2) copy

catch(exception e){
}

(3) reference

catch(exception& e){
}

but what's the meaning for 

catch(exception){
}

it it equal with (2) without no any difference in c++?

Upvotes: 0

Views: 257

Answers (1)

Jeffery Thomas
Jeffery Thomas

Reputation: 42588

In C++, it is possible to have a parameter without a variable name.

You should be able to have all of the following:

catch (std::exception* e) {}
catch (std::exception*) {}
catch (std::exception& e) {}
catch (std::exception&) {}
catch (std::exception e) {}
catch (std::exception) {}

A parameter without a variable name is a signal to the compiler that a parameter is required, but the value is unused in the method.

Upvotes: 4

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