On Sun, 02 Sep 2012 19:14:07 +0200, Peter Alexander
<peter.alexander...@gmail.com> wrote:
One thing that's always bothered me is that I have to use
std.string.format to produce useful assert messages:
assert(x == 1, format("x doesn't equal 1, it is %d", x));
Of course, I tried to solve this by producing my own assert-like
function wrapper:
void myAssert(Args...)(lazy bool condition, lazy Args args)
{
assert(condition, format(args));
}
That's all good, but the problem now is that I get the wrong file and
line in the assert message, so I tried to use the default arg __FILE__
and __LINE__ trick:
void myAssert(Args...)(lazy bool condition, lazy Args args, int line =
__LINE__, string file = __FILE__)
{
if (!condition)
{
writeln("Assertion failed @ %s:%d", file, line);
writefln(args);
exit(1);
}
}
But I can't have default arguments because of the variadic arguments!
Can anyone think of a way around this?
void myAssert(int line = __LINE__, string file = __FILE__, Args...)(lazy
bool condition, lazy Args args) {
if (!condition)
{
writefln("Assertion failed @ %s:%d", file, line);
writefln(args);
exit(1);
}
}
--
Simen
