assert with format considered harmful
Ali Çehreli via Digitalmars-d
digitalmars-d at puremagic.com
Sat Feb 25 22:34:07 PST 2017
If the generation of the error message throws, then the program receives
a FormatException, not the most import AssertError:
import std.string;
void foo(int i) {
// In this case a %s is forgotten but it could be any other trivial
error.
assert(i == 42, format("Bad parameter:", i));
}
void main() {
foo(43);
}
Opened:
https://issues.dlang.org/show_bug.cgi?id=17226
So, obviously, assert message generation is not lazy. This is a WAT! for
me but perhaps there is a good reason for it.
Google found a related article by Peter Alexander:
http://poita.org/2012/09/02/a-better-assert-for-d.html
Ali
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