On 10/02/2018 03:24 PM, Basile B. wrote:
The problem is the NaN madness. Since several values are NaN there's this strange stuff:void main() { import std.stdio; import std.math : isNaN; double d; writeln(d.init); // nan writeln(d); // nan writeln(d.nan); // nan assert(d.isNaN); assert(d == d.nan); // fails assert(d == d.init); // fails } the last assert is just crazy.
NaN simply isn't equal to itself. Has nothing to do with there being multiple NaNs. `d == d`, `double.nan == double.nan`, `double.init == double.init` are all false, too.
