Go: Support for Generic Methods

123 points by f311a 9 hours ago on hackernews | 102 comments

h1fra | 5 hours ago

slowly implementing all the things they said we didn't need

TheChaplain | 5 hours ago

It's not a bad thing to realize that one can be wrong and then strive for change.

a-french-anon | 5 hours ago

Maybe, but personally I've become quite tired of programming languages "organically grown" as opposed to properly designed the first time. After a good decade of C then C++, I found ANSI CL (despite being a massive compromise and unfinished) much more coherent and complete than both.

ramon156 | 5 hours ago

So which language had it right from the start? is there a language that has a very low rewrite status?

bbkane | 5 hours ago

I'd particularly like examples of statically typed languages that "got it right" (since I love me my types)

galangalalgol | 4 hours ago

Ocaml maybe? Multi threading didn't seem necessary and introduced the possibility of data races.

maccard | 5 hours ago

That’s whataboutism - no language is perfect, but given when go released it’s fair to hold them to a higher standard than languages what were designed 25 years earlier.

As an aside - D, Zig, Rust, even typescript got most of the lessons learned from C right

blanched | 4 hours ago

I'm not familiar with D, but Zig and Rust are well-known for continuously evolving.

Zig has the (in)famous "Writergate": https://github.com/ziglang/zig/pull/24329

And besides Rust's high count of RFCs, there are things like async (I'm not complaining about it, but its an obvious large-scale "change"), module system changes, etc.

(To be clear, I like both languages a lot. But I wouldn't call them slow moving or right from the start.)

Maxatar | 2 hours ago

D literally can't even maintain backwards compatibility between minor version updates not to mention a big part of the D community left when D reinvented itself with D2. Among languages it's probably the one that is constantly in a state of flux.

poncho_romero | 3 hours ago

I think Elixir is a good candidate here. It's small, coherent, and composes well, and (at least to my understanding) the authors consider the language finished, with no new major features planned.
"Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp."

-- Greenspun's tenth rule

He had some lack of conviction to scope it so narrowly.

bbkane | 5 hours ago

I know Go is justly criticized for many of its design decisions, but it still feels well-designed and "small" to me in day to day usage when many other languages don't.

a-french-anon | 3 hours ago

Eh, the thing with generics coming late is pretty much what I meant by "organically grown".

My best litmus test these days is support for multidimensional arrays because it's always needed at some point in general purpose languages. CL and Ada had it right from the start while C++ needed C++23/26 to get std::mdspan and we still need to wrap it to pass the underlying/owned memory pool around (https://rosettacode.org/wiki/Multi-dimensional_array for more).

nish__ | 2 hours ago

Doesn't every language support multidimensional arrays? It's just an array of arrays, no? What am I missing?

umanwizard | an hour ago

An array of arrays is an extremely inefficient and error-prone way to represent multidimensional arrays.

If I want a 1000x1000 array, representing it physically as a single 1000000-element array requires one allocation, and processing it element-by-element (assuming it's stored in the same order we're iterating over it) is sequential in memory and therefore very efficient.

Representing it as 1000 separate 1000-element arrays requires 1000 allocations, and pointer-chasing every time we move from one row to the next.

I see. That makes sense.

xscott | 5 hours ago

Scheme is (or at least was) coherent. You don't need to look any further than set/setf/setq to see that Common Lisp is "organically grown" from the fertilizer of a committee. CL does its best to make every other lisp more attractive.

rootnod3 | 4 hours ago

Which Scheme are we talking about? R5RS? R7RS-small? R6RS? With SRFIs? Without? Which scheme? Is it `(library...)` or `(define-module...)`?

xscott | 4 hours ago

Heh, I'd probably take R4RS with define-syntax :-)

rootnod3 | an hour ago

I mean, good choice, but you see the point, right? As much as ANSI CL has it's flaws, it has a standard, as much of a mixed bag it might be. Scheme is just a general potpourri of "we kinda have a guideline, but do whatever".

I would very much prefer scheme if the different implementations had a working standard. But I can't take my Chez-scheme code and throw it into Guile-scheme.

But pretty good chance I can take my ECL code and throw it into SBCL or LispWorks.

rahen | 3 hours ago

Scheme has a coherent and minimalist design, but its ecosystem and abstraction facilities feel too sparse for large applications.

When I started building a Lisp-based machine learning framework, Guile seemed like the right choice because it provides GOOPS and generic functions, yet I still ended up with a lot of boilerplate to compensate for the lack of a strong type system.

Scheme feels to me like C is to C++: not ergonomic for large-scale application development. Go is one of those languages that has both minimalism and productivity.

rootnod3 | 4 hours ago

ANSI CL is such a breath of fresh air nowadays. Does what you need, doesn't get in your way, comes with batteries included. And conditions are just god-tier.

boxed | 4 hours ago

I liked Objective-C (except the C parts). Such a breath of fresh air coming from C++ which was grown like a cancer with tons of features and you felt trapped by every one of them.

Objective-C in contrast was a very few additions thoughtfully added that composed cleanly and freed the programmer to actually get things done.

iosjunkie | 3 hours ago

"properly designed" - ah yes, programming languages are famous for universally agreed upon design philosophies.
so make your own and let's see how you do

rootnod3 | 2 hours ago

Have you?

pizza234 | 2 hours ago

It isn't realistic to expect a design to be "proper in first place" because requirements change; my opinion is indeed the opposite - I find it natural for programming languages to have a (sort of) lifespan, and for new ones to (sort of) take their place.

someone_19 | an hour ago

Indeed, in 2012, it was not clear to anyone that generics were needed /s

skywhopper | an hour ago

You may be tired of languages evolving over time, but there is no other way to build a rich and useful language.
I don't think anyone admitted any wrong or had any big change in philosophy. It's always a good thing to learn something along the way. But the current message seems to be that this was the plan all along, and it just took some time to design properly.

Of course adding generics is not something that every language needs to do. Scripting languages like Ruby don't really need this style of generics. It doesn't fit the design of the language, and it's not even clear what that would look like in Ruby.

But static typing with generics does solve a recurring problem, and we've seen some real convergence towards type hints and type systems even in staunchly dynamic scripting languages. Modern Javascript is now mostly Typescript, and they've successfully retrofitted a very advanced type system in the last place I would have expected 20 years ago.

galangalalgol | 5 hours ago

Type hinting seems like the worst of both. You pay the cost on refactor to go change them all, where dynamic typing or static type inference avoid that. You also don't have any of the benefits of static or dynamic typing. My strong preference is static typing with good inference and an ide that shows the inferred types everywhere when asked. Dynamic typing can make some tasks dramatically easier, I'm just not capable of using them without making hideous mistakes.

maccard | 5 hours ago

There’s a fine line between being willing to change your mind and getting the basics wrong. Go has repeatedly gotten the basics wrong.

Jleagle | 5 hours ago

Sounds like you want this feature, and you just got it. Not sure how that's wrong. You don't add in every feature from the start.

maccard | 5 hours ago

I wanted it 10 years ago.

whoiskevin | 4 hours ago

Declaring a highly successful language as having the basics wrong means that you are not correct about the basics that were needed.
An engineer, of course, understands that there is no such thing as "wrong", only different tradeoffs, but with the rise of "vibe coding" you don't need to be an engineer to play in the world of programming anymore.

jeswin | 4 hours ago

It's a highly successful language because (1) it was backed by Google, and (2) created by Robert Griesemer, Rob Pike, and Ken Thompson.

If it came out of anywhere else, it might have struggled even to hit the homepage here.

amazingamazing | 4 hours ago

This logic is easily shown to not hold. Why isn't Carbon, Dart, etc. not really popular then?

voidfunc | 4 hours ago

Its just bitter dorks bitter their pet language with cutting edge programming abstractions didnt make it to the big leagues.

doodpants | 3 hours ago

I can't speak about Dart, but Carbon had just barely started development when it was first announced 4 years ago, and is currently presented as an experimental language that is not yet ready for use [0].

0: https://github.com/carbon-language/carbon-lang#project-statu...

no_wizard | 52 minutes ago

Dart was relegated to effectively being Flutter. It was originally intended to supersede JavaScript but no other engine would commit to that. It failed at its initial goal and hasn’t really found a footing outside of Flutter.

Carbon is by its own admittance not ready to use and I think mostly relegated to solving Google’s problems with C++ right now.

Both of them didn’t ship with a standard library as robust as Go’s.

One thing that made Go popular out of the gate is it is extremely good fast to build out robust HTTP services and infrastructure.

This is a very common use case and they tailored Go to be a great fit for it. You can build your entire backend without a single third party module if desired using Go’s standard library and it isn’t terribly complicated to do so.

maccard | 4 hours ago

Something can be highly succesful in spite of having glaring design flaws. Nobody is claiming go isn't wildly succesful, but it's _in spite_ of these issues. It was clear over a decade ago that iota, gopath, and lack of generics were massive kneecaps to the language; go changing it's mind on those things isn't progress it's just getting the fundamentals wrong.

A good example of where they're kind of stuck is date formatting - it's stupid, unclear, and likely a mistake, but it's not a fundamental flaw; it's just a quirk.

Why is iota a massive kneecap to the language? It is semantically identical to enum in C and Typescript.

The trouble is that Rust is older than Go and it was already confusing people into thinking enums and sum types are the same thing, so by using slightly different syntax, iota, Go avoided the whole confusion of users thinking that enums would behave like sum types instead of actual enums.

Is your attempt at making a point that not having sum types is the massive flaw? Sum types are a useful construct, to be sure, but there are plenty of good languages without them. That's more on the design quirk end, realistically.

jolux | 4 hours ago

Rust is technically older than Go, but who was actually using it when Go 1.0 came out in 2012? Rust 1.0 wasn’t until 2015.
The social landscape doesn't depend on anyone actually using it. However, 1.0 isn't a significant milestone like you suggest either. For a current example, Zig is relatively popular today despite not yet reaching 1.0.

maccard | 4 hours ago

> Why is iota a massive kneecap to the language? It is semantically identical to enum in C and Typescript.

iota is a massive kneecap _because_ it's semantically identical to enum in C and Typescript.

> Is your argument actually that not having sum types is the massive flaw? Sum types are a useful construct, to be sure, but there are plenty of good languages without them. That's more on the design quirk end, realistically.

In a dream world sure we'd have full blown sum types (and that would give a result type which would also solve a lot of the nil-interface-combined-with-error-handling issues that I've ran into when working with go), but I can forgive that. The problem is this - https://www.zarl.dev/posts/enums

> The problem is this - https://www.zarl.dev/posts/enums

The only case I see made in there is that it doesn't like how Go implicitly converts consts. While that may be a reasonable criticism, it doesn't have anything to do with iota. It is related to the type system and applies in general. Consider the same problem exhibited here:

    type Email string
    func Send(email Email)
    func() { Send("invalid") } // Converted string const does not satisfy Email type expectations
Perhaps you accidentally offered the wrong link?

It was made abundantly clear when Go was released that it was intended to "feel like a dynamically-typed language". Being able to pass arbitrary values is perfectly in line with a dynamically-typed language. Realistically, the type system in Go is there to give the compiler optimization hints, not to offer type safety. Go was targeted at those wanting to use Python, without the programs being painfully slow to run. How much of a kneecap is implicit type conversion, really, when it is already in line with what the target audience is accustomed to? It is a quirk at best.

maccard | 51 minutes ago

> It was made abundantly clear when Go was released that it was intended to "feel like a dynamically-typed language".

If I google this quote a comment from you comes up here on this exact topic, where you seem to have completely missed the point there too. If I link to the docs [0], the full quote is "It's a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language. " So it is a statically typed language first and foremost. If you want to rehash the discussion and tell people that a flawed type system that people have been asking for a solution to for close to a decade [1] you can just re-read the last time the arugments were made as I don't think I'm going to make any headway there.

[0] https://go.dev/doc/ [1] https://github.com/golang/go/issues/19814

> So it is a statically typed language first and foremost.

Right, because that is primarily how it makes things fast. Python is slow largely because it spends an inordinate amount of time trying to figure out what things are. Go knows what things are at compile time because the static type system tells it what things are and thus doesn't have to waste runtime compute on figuring out what things are, aside from when you use the reflect package, like Python does. That was its value-add — that it is kind of like Python, but faster. We already went over this...

> If I link to the docs [0]

I said original announcement, so I'm not sure why you wouldn't look there? Trying to be obtuse on purpose? Regardless, performance was indeed considered more important than being dynamically-typed. After all, if performance wasn't a concern then you'd just use Python. Go exists only because it was solving a problem that wasn't already solved. Slow Python was already solved. Type safety was already solved. It didn't need to go into those territories.

stouset | 46 minutes ago

> Why is iota a massive kneecap to the language? It is semantically identical to enum in C and Typescript.

So is nil. Care to make the same argument?

boxed | 4 hours ago

The basics of a programming language were wrong. The basics of marketing were very right. Those are not the same.

n6242 | 4 hours ago

By that logic Windows would be the best operating system ever and perfect in every way, and anyone who disagrees must be wrong about how an OS should be.

hocuspocus | 4 hours ago

And Javascript and Python the best languages.

OtomotO | 4 hours ago

cough JavaScript cough

someone_19 | an hour ago

So you mean to say that PHP5 and Js from 2007 had a well-founded design?

layer8 | 4 hours ago

It’s still annoying ~20 years after Java did the same mistake of not including generics, which was already clear to many people with C++ experience back then.

someone_19 | an hour ago

...and Java didn't even have basic enums or sum types from the beginning. But it had null.

They added enums, they added sealed classes. They're trying to get rid of null (apparently it's really hard). The problem is that in 2012, when go 1.0 was released, this should have been obvious to everyone.

Here's a famous discussion from 2009, three years before the 1.0 release (tldr: facepalm)

https://groups.google.com/g/golang-nuts/c/rvGTZSFU8sY

I remember back in 1995 thinking that it was stupid for Java not to have generics, so instead you had to always cast Vector/Hashtable elements from Object, or implement your own type-specific container classes for every element type (and there was even no preprocessor for facilitating the latter).

Sum types I didn’t really miss, because you can implement a type-safe equivalent using the Visitor pattern, and retain an interface-implementation separation that native sum types typically don’t provide.

Of course, if you go back and watch the original Go announcement it said that it would need generics once they figured out how to do it. And when the first version of generics landed it was said that generic methods would be added later, once they figured out how to do it. So that isn't applicable here. The need was always recognized.

CamouflagedKiwi | 4 hours ago

They didn't say they never wanted to do generics, but that they did want to take their time and do them right.

Debatable how much they have been "right", although this gets them somewhat closer. And I think they have not been "wrong" in the ways they wanted to avoid (they referenced some issues with Java generics as prior art, although I forget the details).

tines | 2 hours ago

From another commenter here:

> The post quotes the Go FAQ as saying, "we do not anticipate that Go will ever add generic methods".

skywhopper | an hour ago

Is anyone actually mad about this, or do people just bring it up to stir the pot? Who cares what the FAQ says? They've worked out a way to add it easily in a backwards compatible way that can solve some problems. They had not identified this solution at the time they wrote the FAQ, and Go has been perfectly usable without this feature for 16 years.

stouset | 57 minutes ago

We care that time and time again, when anyone ever brings up a criticism of the language, they’re told that everything is just fine and it’s not a problem and we just don’t get the Go Philosophy. There’s not a problem, stop trying to make Go like every other language, and changing things would make the language more complicated and worse.

Then when the language is inevitably changed for the better, resolving the complaint, suddenly it was always going to happen and it was just a matter of getting the details right.

Every other language community I can think of is more than willing to acknowledge the shortcomings of their language. “Yeah, this kind of sucks in principle but it’s not something that gets in the way in practice” is a fine perspective. So is “this was a tradeoff; we went in this direction and these are the resulting downsides”. But the golang community practically trips over themselves to constantly argue that obvious shortcomings in the language are actually a good thing and we just don’t get it.

Nobody is saying the language shouldn’t improve. We’ve all been begging the language to improve. But we’re also tired of the constant, obvious, and shameless gaslighting from the community whenever things do get better. You aren’t going to like the comparison, but it’s extremely Trumpian.

jaxlfkkgken | 39 minutes ago

All the butt-hurt oracle trolls that roam hacker news are obviously jealous that a decent language has become more popular than java.
I'm not mad, I'm a proponent of stronger type systems. I'm just correcting the record about

> They didn't say they never wanted to do generics, but that they did want to take their time and do them right.

someone_19 | an hour ago

I agree that they were clearly not in a hurry. I disagree that they are doing everything right. I am interested to see how they will fix the 'million dollars mistake'.
Depends you who "they" is. If you mean the go development team, then yes, they said they wanted to "take their time and do them right"¹. But there are many "gophers" who did say that there was no need for generics, and that it shouldn't be added to the language.

¹ I would argue that it is really, really hard to add generics to a language after it has already matured, and still "do it right" than to add it in the beginning. At least if you care about backwards compatibility. Backwards compatibility adds a lot of constraints to your generics system that will almost certainly lead to a sub-optimal design. And you will be stuck with a standard library, and a lot of existing ecosystem code that would benefit from generics, but don't because generics didn't exist when they were written. This is a lesson I wish go had learned from Java's generics.

Cthulhu_ | 3 hours ago

Where did "they" say "we" didn't need generics? That sounds like a bad faith / misinterpretation / straw man; as someone else pointed out, they postponed generics until they figured out the use cases and whatnot.

Remember that the generics implementations in other languages (like Java) take up half the spec + implementation - that's not something that Go wanted.

tines | 2 hours ago

From another commenter here:

> The post quotes the Go FAQ as saying, "we do not anticipate that Go will ever add generic methods".

entrope | 2 hours ago

You keep posting that. Do you understand the difference between that and "we anticipate that Go will never add generic methods"? What they actually said shows epistemic humility and recognizes that they might change their mind.

tines | 2 hours ago

Hi! I'm a human being that is trying to understand the world and make friends along the way. I see you are too! Pleased to meet you.

You asked the question

> Where did "they" say "we" didn't need generics?

And I (re)posted a quote from them, which sounds to me like, at the time, they believed that "we" Go users didn't need generics.

They may have changed their mind, which is totally fine! But I do think it sounds like the person you were replying to wasn't commenting in bad faith or misunderstanding or fighting a straw man as you posted. Seems like a reasonable interpretation of what the Go devs had said at one point. To each his own though!

ncruces | 22 minutes ago

Do you understand the difference between generics and generic methods?

We already had generics when they wrote "we don't anticipate adding generic methods."

complaining about things given to you for free

doodpants | 2 hours ago

I frankly don't buy into this trope that a lack of monetary cost should shield something from criticism. Anything created by humans for other humans, especially tools meant for getting work done, should certainly be open to evaluation/judgement/critcism, regardless of whether the creator chooses to charge for it.

And it's not like Golang is some freshman student's hobby project; it was created by one of the world's largest tech companies, by people with a strong pedigree in programming language design.

kardianos | 5 hours ago

This is great. Will be useful for data access methods!

As for the detractors, from the first generics proposal this was called out as a "not now", not never. There were questions of implementation. They aren't a super large team, and they try to do things incrementally and do them well.

dude250711 | 4 hours ago

Gophers are usually quite fast, perhaps an elderly turtle would be a better mascot?

rob74 | 4 hours ago

In day-to-day usage, the (fast) compilation speed matters much more than the (slow) implementation of new features.

christophilus | 4 hours ago

I totally agree, but I'd go further and argue that slow implementation of new features is itself a desirable trait. It's one of the reasons why why I like both Go and Clojure.

aktau | 4 hours ago

Spot on. Heaven forbid it turns into a C++ (I'm not a Rust practitioner but from the outside it seems to accrete features pretty quickly as well).

The ease of grokking Go (both reading and writing) are big advantages, and facilitated by the "small" feature set of Go.

cookiengineer | 2 hours ago

> Gophers are usually quite fast, perhaps an elderly turtle would be a better mascot?

The slow turtle wins the race against the overly eager rabbit... so I'm okay with that

tczMUFlmoNk | 3 hours ago

> As for the detractors, from the first generics proposal this was called out as a "not now", not never.

What? The post quotes the Go FAQ as saying, "we do not anticipate that Go will ever add generic methods". There is also some similar discussion of the original generics proposal, with language like "then it's much less clear why we need methods at all". (I'm omitting some context, but I don't feel that it changes the meaning.) Those feel much closer to "never" than "not now".)

The post is also subtitled "A change of view".

kardianos | 3 hours ago

I could be mis-remembering it. I didn't look up and src it.

stouset | 2 hours ago

No, you’re clearly wrong; golang was always going to add support for generic functions.

Everyone also wanted and accepted the need for generics. It was always something they wanted to add to the language. Rob Pike never said that that kind of abstraction isn’t what golang is for. It was always just a matter of getting the design right.

Go has always been a systems language. It was one when we thought it was going to fit nicely for low-level, high performance use-cases. Given that the GC, runtime overhead, lack of control over memory layout, and other issues made it a poor fit for what we historically thought were systems language tasks, it’s still a systems language because we’ve grown to understand that the term “systems program” has always meant network middleware that shuttles around JSON and transforms it.

Dependency management too. Modules were something that nobody argued were unnecessary. None of the language developers ever claimed that “you should always build against HEAD, and if upstream breaks you, that’s a coordination problem to be solved socially”. The community didn’t need to independently invent godep, then glide, then govendor, then dep, before the core team finally shipped modules. That was just enthusiastic parallel exploration of a problem space that everyone agreed was a problem.

GOPATH was always understood to be an awkward temporary scaffold that everyone tolerated while the real solution was being designed. The single-workspace model was never defended as philosophically correct or a deliberate feature of the language. When modules arrived, everyone was simply relieved that this obvious stopgap was finally replaced.

The core team always intended to add builtins for min/max. Nobody ever told you to just write `if a > b { return a }; return b` yourself because it was “only two lines.” The fact that every Go codebase in existence had its own copy of this logic, typically buried in a file called util.go, was not evidence of anything being missing from the language.

Range was always a stopgap before iterators could be implemented. Nobody ever argued that iterators were needlessly complicated and went against the spirit of the language. The slices and maps packages provided important missing features that everyone using the language wanted.

Everyone agrees that errors were anemic from the outset. errors.Is/errors.As are nice additions but everything was Just Fine™ before they were added.

Speaking of errors, having two lines of error-handling boilerplate for every line of code is good, and right, and perfect. It’s not verbose; it’s “explicit”. But when that gets changed to be less verbose, we will all agree that it was always a pain and made reading code unnecessarily more difficult and that everyone always expected this to be fixed some day.

I personally can’t wait to see what next development will never have been “against the Go philosophy” and definitely not something that gophers argued was perfect the way it was any time misguided malcontents and rabble-rousers wrongly tried to suggest the language wasn’t perfect the way it was.

> term “systems program” has always meant network middleware that shuttles around JSON and transforms it.

Who are we that has always defined that term that way. For any systems programmer golang has pretty much not been a solution.

Systems is below layer 4 of the network stack, it is building the network stack in the first place.

masklinn | an hour ago

I think your sarcasm detector has gone missing chief.

cyphar | an hour ago

> The community didn’t need to independently invent godep, then glide, then govendor, then dep, before the core team finally shipped modules. That was just enthusiastic parallel exploration of a problem space that everyone agreed was a problem. When modules arrived, everyone was simply relieved that this obvious stopgap was finally replaced.

And of course, it was replaced with a more correct implementation that was incompatible with that awful stopgap because semantic correctness trumps all. vendor/ trees and GOPATH were never meant to be remotely compatible, and don't you know -- the Go compatibility guarantee(TM) doesn't apply to misuse of GOPATH to work around shortcomings^Wwell-considered designs of Go, even if it breaks the largest Go project at the time!

(/s It still shocks me that they decided to drop "src" from vendor/src and break compatibility when they finally got around to supporting vendoring despite every tool using it. And symlinks don't work because Plan 9 is the future!!)

> I personally can’t wait to see what next development will never have been “against the Go philosophy” and definitely not something that gophers argued was perfect the way it was any time misguided malcontents and rabble-rousers wrongly tried to suggest the language wasn’t perfect the way it was.

I really hope it is more ergonomic error handling. Or maybe sum types/discriminated unions.

stouset | 22 minutes ago

Those are fine the way they are. I don’t want the language getting more complicated. Rob Pike has said they’ll never happen. Suggestions like this are extremely against the Go way of doing things. Actually the verbosity is a good thing. It’s explicit.

nasretdinov | 4 hours ago

Lack of generic methods was really surprising to me when I was first trying to use generics in Go. Nice to see it being actually implemented

ncruces | 3 hours ago

To be replaced by the surprise when you figure out these methods don't implement interfaces.

Still, in this case, half the feature is better than none at all, IMO.

nasretdinov | 2 hours ago

Generic interfaces are going to be implemented later too if I'm reading correctly. So no real surprises there :). I guess the only surprise yet is that generic interfaces aren't supported, so generic methods physically can't satisfy any interface

ncruces | 34 minutes ago

I didn't see anything beyond "this doesn't prevent us from doing it" yet.

Did you?

reactordev | 4 hours ago

This resolves a big gap in generics for most people coming from other languages to go so I completely approve this direction. Not saying use it everywhere but if you must use it, it’s better to have it on the struct than call a module level generic func.

binary132 | 4 hours ago

Chasing a perceived gap between language features and user expectations has been and continues to be the greatest error in the leadership of Go.

pizzafeelsright | 2 hours ago

The nagging imperative requires a stronger response than the capitulation of identity.

throwpikerob | 4 hours ago

A sad day for Go, the pHDs have won, simplicity has died.

valyala | 3 hours ago

Cthulhu_ | 3 hours ago

It only died if you actually applied it in your own codebase - as with any feature, using it is optional.

samber | 4 hours ago

OMG. I'm going to recode some of my libraries.

mackross | 2 hours ago

What a happy surprise today! The amount of times I’ve had to do weird janky package APIs so the API was still reasonable is more than I can count.
This will finally let me make the monad library I've been dreaming of for years. Be afraid.

nasretdinov | 17 minutes ago

We already have monads at home (return X, err)