Re: Exception base class
Lars Schouw wrote:
Hi,
I want to construct an exception base class that is easy to use.
Ideally I want to be able to throw exceptions in one liners like this:
throw Exception("string1" + "string2 <number>", 5.0);
I can use boost::format but don't want to use any boost in my code.
Would look like this.. a two liner.
string err = str( boost::format("test %s%") % "some more into");
throw Exception("string1" + "string2 <number>", 5.0);
<snip>
Lars, I do this:
class my_exception: public std::runtime_error
{
public:
// Enumerated list of error codes...
enum Code {
code1, code2, ...
};
// Template struct that just exists to map Code-s to distinct types
template < Code CODE >
struct C {
static const Code x = CODE;
};
// Now I can overload my ctors on the error code
my_exception( const C<code1>&, const std::string &s1,
const std::string &s2, double x );
my_exception( const C<code2>&, int x, int y );
...
};
This lets you throw in one line, albeit at the cost of some ugly
syntax:
throw my_exception( my_exception::C< my_exception::code1 >( ),
"string1", "string2", 5.0 );
but then...
Andy Venikov <swojchelowek@gmail.com> writes:
Did you take a look at boost::exception?
I allows you to do what you want.
I didn't know that boost::exception existed & will definitely be
digging into it... thanks, Andy.
--
Michael <sp1ff@pobox.com>
web o http://www.unwoundstack.com
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