aspestrand@gmail.com schrieb:

Hi, just wondering if anybody can answer the following question as it
doesn't seem to be anywhere in the C++ spec.

The compiler can.

What will print from the following statement? (note the order of the
catch statements):

void func(void)

{
try
{
const foo f1;
throw f1;
}

Since classes are thrown by value (copied), the const qualifier doesn't
affect the thrown object. So the body of catch(foo&) will run.

g++ also gives this warning:

$ g++ throw.cpp
throw.cpp: In function 'int main()':
throw.cpp:20: warning: exception of type 'foo' will be caught
throw.cpp:16: warning: by earlier handler for 'foo'

And the output:

$ ./a.out
foo &