Replacement for `fabs`, `fmax`, etc. for use with CGFloat on 64-bit iOS devices

Question

Question

Consider layout code like this:

CGFloat descriptionHeight = // height of a paragraph of text with zero or more words;
CGFloat imageHeight = // h         


        

Answer 1

There is never any "data loss" incurred when converting a float into a double. That conversion is always exact.

Your solutions 1 & 2 are entirely equivalent semantically, though (2) is more stylistically correct.

Your solution 3 is formally not equivalent; it may incur extra conversions between float and double, which may make it slightly less efficient (but the actual result is identical).

Basically, it doesn't matter, but use tgmath.