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Why do libraries define their own true and false?
(pawb.social)
I’m working through the vulkan tutorial and came across GLFW_TRUE and GLFW_FALSE. I presume there’s a good reason but in looking at the docs it’s just defining 1 and 0, so I’m sorta at a loss as to why some libraries do this (especially in cpp?).
Tangentially related is having things like vk_result which is a struct that stores an enum full of integer codes.
Wouldn’t it be easier to replace these variables with raw int codes or in the case of GLFW just 1 and 0?
Coming mostly from C, and having my caps lock bound to escape for vim, the amount of all caps variables is arduous for my admittedly short fingers.
Anyway hopefully one of you knows why libraries do this thanks!
True is not zero in C. You can always compare a value to 0 if you need false but cumparing to any single value for true is wrong. Often functions will return some calculated value which would be zero for false and who cares - it isn't zero so return it for true. Thus all defines of true are suspect.