[swift-evolution] implementing real (floating point) number comparison tolerance as a compiler directive.
ted van gaalen
tedvgiosdev at gmail.com
Tue Mar 1 12:28:10 CST 2016
in relation to my message about handling floating point number comparisation tolerance in e.g. a .stride function, wouldn't this be better handled by a compiler directive?
@floatingPointComparisonTolerance = 0.001
// all source that follows this will be compiled with this value
// until reset or another value is specified with this directive.
if fp1 == fp2 // will be evaluated with the above specified tolerance.
for v in minival.stride(to: maxival, by: 0.1)
for e from -1.0 to 123.45 by 0.1 // also in loops of course, as here in the for loop variant I will propose.
At any time, you should be able to change @floatingPointComparisonTolerance,
which will have its effect on source lines that follow it.
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