if(comptime(boolean))
#Understanding comptime
tacit hull
cursive tusk
comptime if (boolean) {...};
stoic magnet
that wouldn't work tho
cursive tusk
and what corner suggests if you need to make the code itself runtime
tacit hull
yep
stoic magnet
wouldn't comptime if be all comptime?
tacit hull
it would
cursive tusk
yeah, which is what the original question is asking about
stoic magnet
I thought it was asking about conditional runtime code
cursive tusk
just look at the g'damn question
stoic magnet
ye, I see it...
gleaming pendant
Yeah I agree with Chuck's reading
gleaming pendant
Slightly more in-depth
if (cond) will only include one branch if cond is comptime-known. There are a few ways you can do that:
- you can explicitly mark it using the
comptimekeyword, which is what corner suggested (although he used unnecessary parens,comptimeisn't a function: justif (comptime expr)) - it'll be automatically evaluated at compile-time if it's a simple expression whose value is known at compile-time. For instance, if you check
builtin.os.tag == .linux, that'll be automatically checked at comptime. By "simple expression" here I basically mean "not a function call" (although calls toinlinefunctions do get comptime-evaluated; or rather, the function's body is effectively pasted straight into the condition and evaluated there)
cursive tusk
just right click the question on the left and mark as "closed"
if you don't, eventually somebody on the mod team will
tacit hull
Slightly more in-depth
`if (cond)` will only include one branch if `cond` is com...
comptime has really terrible precedence, I've seen situations where it only applied it to the lhs of a comparison
that's why I always stick parens on it
in if(comptime value == f()) I've seen it only evaluate the lhs at compile time
cursive tusk
should be defined as having the lowest precedence
tacit hull
should be defined as having the lowest precedence
definitely, and try needs a higher one
cursive tusk
lol
tacit hull
so that I can do try f() orelse a
cursive tusk
anyway, end of discussion, question is answered