ChanServ changed the topic of #zig to: zig programming language | ziglang.org | be excellent to each other | channel logs: https://irclog.whitequark.org/zig/
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<stratact>
andrewrk: does Zig have generic functions?
<andrewrk>
stratact, yes. any function which has a comptime parameter
<stratact>
thanks, I'll look into comptime
<stratact>
andrewrk: I got a minor suggestion about the array syntax. Would it be possible to replace the use of curly braces around the items, with square brackets, cause square brackets just looks "nicer" in modern syntax
<stratact>
unless it's for a C compatibility thing?
<andrewrk>
stratact, that might be a natural consequence of when we add tuples
<stratact>
andrewrk: I'm in agreement with what alexnask said in that issue
<andrewrk>
noted
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<unique_id>
Hi. I've been here before under a different nic. Don't remember it. Anyways, I think it's time I start writing some code in zig :)
<unique_id>
I find it really difficult to choose between a "better C" and a "better C++" (c++20 and onwards). Both are great choices.
<unique_id>
though one comes with a life long learning curve while the other one forces me to learn casting again :)
<MajorLag2>
You get used to the casting pretty quick. Thing about it is, you ask yourself: "is there a cost, or potential hazard, to casting between these types?" and if the answer is yes then it shouldn't be implicit. So it's worth re-learning I think.
<unique_id>
Yeah I need a break from C++. I haven't had good experience with importing C headers so I'll do some manual translation instead.
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<unique_id>
How do I look at the code zig generates when importing c headers?
<unique_id>
So I can learn the way c headers are translated
<unique_id>
I could have sworn there was something, maybe some utility?
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<MajorLag2>
`zig translate-c file.c`. This will dump to stdout, so you may want to redirect.
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<ltr__>
can we currying with zig?
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<andrewrk>
ltr__, I don't think so
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<GitHub130>
[zig] andrewrk closed pull request #1195: Fix crash on assertion for enum switch values (master...switch-enum-fix) https://git.io/fbpOR
<Bas_>
Another thing I couldn't really find an answer to was generics and how it handles custom types. For example if I want to print my custom struct, can I somehow make printf do that?
<andrewrk>
ah good question, I don't remember if there is an issue open for that. zig's compile-time reflection is powerful enough to support printing custom types, plus I believe there is a plan to have std.fmt.format() call a custom formatting function if it exists. let me check
<andrewrk>
Bas_, so if your custom type has a `format` method then you can use std.fmt.format() on it (std.fmt.format is used by all the formatted print functions such as std.debug.warn)
<Bas_>
Ah alright.
<Bas_>
Ah I see. I really like how you can just code stuff, instead of having to use arcane template magic or anything.
<andrewrk>
I do think the comptime stuff came out quite nicely :)
<Bas_>
Yes, it definitely looks good.
<Bas_>
One other thing. Are there any plans for having multiple return values?
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<andrewrk>
I don't think I mentioned it in the proposal but you'd be able to use `var a, var b = foo()` syntax to unpack a tuple return value
<Bas_>
Awesome.
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<andi3>
new website style looks great !
<andi3>
maybe this is stupid but is there any stdlib docs yet/ plans?
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<andrewrk>
plan is to implement that in the self hosted compiler
<andrewrk>
which I'm working on full steam ahead
<andrewrk>
potentially even the docs before any other kind of compilation
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<stratact>
andrewrk: you being the developer, I like how open you are to users suggestions, where not many folks from other languages aren't, so that's a plus for Zig imo
<andrewrk>
I'm super open to the discussion but sadly I have to say "no" to a lot of ideas because one of the main selling points of zig is simplicity and lack of features
<stratact>
yeah of course, I mean within suggestions to fit Zig's goals
<andi3>
ok really good to hear
<andrewrk>
my goal right now is to have the self hosted compiler watching all the source files - even for doc generation - and automatically recompiling
<andrewrk>
so you would be able to edit docs in your editor, press save, and then refresh your browser and the docs would be updated
<stratact>
sounds cool
<Bas_>
Oh cool, you have a building build system!
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<Hejsil>
Curse you compiler bugs! I want this to work!
<Hejsil>
Btw, FixedBufferAllocator is a great easy way to see how much something allocates
<andrewrk>
yep
<andrewrk>
did you see as well, std.debug.FailingAllocator?
<Hejsil>
Yes i did
<andrewrk>
to test your error handling
<Hejsil>
Ye, I should probably do that to
<Hejsil>
And the static build of Zig is great CI!
<andrewrk>
oh nice! that makes sense
<andrewrk>
Hejsil, did you see that I have a proof of concept of multiplexing coroutines onto a thread pool working?
<Hejsil>
I did
<Hejsil>
Exiting stuff
<andrewrk>
unfortunately we can't tell how fast it is yet because there's an outstanding llvm bug that is forcing us to disable optimizations for async functions
<GitHub152>
zig/master 1cf7511 Andrew Kelley: add compile error notes for where struct definitions are...
<GitHub152>
zig/master 6d793c0 Andrew Kelley: langref: add more internal links
<stratact>
So in Zig, are all types themselves except without pointers, copyable? Like there is no "move" in which you can't access the types again?
<stratact>
*access the values
<andrewrk>
I want to get to a place where we can say: "the only hidden memcpys occur at variable declarations", but we're not there yet
<andrewrk>
but that's correct that there's no concept of "move" at the language level
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<andrewrk>
if you assign one struct to another, it does a memcpy
<stratact>
Understood
<bodie_>
just make rvalue references a thing :^)
<andrewrk>
there is some more design work to do here though. I want to make certain things guaranteed to not copy
<andrewrk>
for example I want to guarantee that returning a struct from a function, the adress of the struct in the body and at the callsite will be the same
<andrewrk>
this is not currently the case
<stratact>
That sounds really challenging, you'd probably have to allocate for that?
<stratact>
oh wait, the function could be inlined?
<andrewrk>
nope, for example one way we could do it is named return values, and the caller passes a pointer
<andrewrk>
I actually didn't know this was possible
<andrewrk>
the point of giving them a name is to make them addressable, so you can rely on field addresses being correct after the function returns
<stratact>
That will be fantastic to have :)
<bodie_>
I think named return values in Go are just sugar
<bodie_>
for a var declaration
<bodie_>
it is convenient for avoiding an extra line in certain very short lambdas and such
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<Bas_>
Isn't that pretty much how return value optimization works? Instead of (in C++) int foo(); it basically becomes void foo(int& return_value); and it assigns to the return value instead of returning it.
<andrewrk>
Bas_, indeed, however it's not guaranteed in C or C++
<andrewrk>
and what I want is for zig users to be able to rely on it semantically
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<andi3>
it actually is in c++17
<Bas_>
I don't like this magic. And there are all kinds of rules. Just write it the second way to be sure ^^ no need to let smartass compilers figure it out for you.
<Bas_>
(or not if you do it slightly wrong)
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<Bas_>
Is there a way to get a stack trace on windows? I get TodoSupportCoffDebugInfo =(
<andrewrk>
Bas_, I'm afraid that's one of the high value big features that zig needs
<andrewrk>
windows stack traces
<andrewrk>
Hejsil, here you go, have your times() function
<GitHub98>
zig/master 4ad4cd2 Andrew Kelley: fix iterating over a void slice...
<andrewrk>
an undefined void value. I wonder what it is??
<andrewrk>
could it be... the only possible value that void can be?
<Bas_>
haha
<Hejsil>
Du we have some runtime checks in case i use an undefined void? :)
<Bas_>
Can anyone explain the difference between these two? expected type '[*]align(8) u8', found '*[]align(8) u8'
<andrewrk>
Bas_, do you have a small code example? I just changed the way that error message works
<andrewrk>
oh, it took me a moment to see it
<andrewrk>
the first is an unknown length pointer to u8
<andrewrk>
the second is a pointer to a slice of u8
<andrewrk>
Bas_, try b.ptr
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<andrewrk>
if you looked at a memory diagram of those, the first would have 1 arrow, the 2nd would would have 2 arrows
<Bas_>
thanks, that worked.
<Bas_>
I see
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<Bas_>
So I only have two things I'm not happy about. The sublime text syntax doesn't understand how to find functions or toggle comments and I've no stacktrace. ^^
<GitHub26>
zig/master e19f0b5 Andrew Kelley: remove outdated semantic analysis documentation
<andrewrk>
afk, back in a few hours
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<Bas_>
Great, I ported my hashing algorithm without too much trouble.
<Bas_>
I'll try around a bit more this weekend. :)
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<MajorLag2>
Windows traces are a constant thorn in my side. I've done a lot of warn() debugging. Sadly, it's kind of a difficult issue since Microsoft only distributes the DIA dll with VS and BuildTools, meaning zig can't rely on its presence and can't include it, so the only option seems to be reading the pdb ourselves.
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