how to check if a specific float can be losslessly converted to the specified integer type? | Zig Programming Language | Page 1

cinder pecan Dec 5, 2023, 7:23 PM

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Basically, is there a standard lib function im missing that can check if

a float has a fractional component
if it fits within the bounds of the specified integer type

i'm fine if it can only check the 1st point, the 2nd point should be fairly easy to check.

vivid pebble Dec 5, 2023, 7:30 PM

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Not sure this is the best way (since you only want to check if a fractional portion exists, not necessarily retain the fractional value), but you can get both the integer and fractional values of a float using std.math.modf: https://ziglang.org/documentation/master/std/#A;std:math.modf

cinder pecan Dec 5, 2023, 7:31 PM

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that works

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ty

dawn sierra Dec 5, 2023, 7:31 PM

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std.math.lossyCast and check if it is equal?

cinder pecan Dec 5, 2023, 7:32 PM

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that prob makes the most sense

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esp if i just do a @intFromFloat

#how to check if a specific float can be losslessly converted to the specified integer type?