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generics advice #39644

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buffge opened this issue Jun 17, 2020 · 3 comments
Closed

generics advice #39644

buffge opened this issue Jun 17, 2020 · 3 comments
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FrozenDueToAge generics Issue is related to generics LanguageChange v2 A language change or incompatible library change

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@buffge
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buffge commented Jun 17, 2020 •
edited

1. Whether to consider using < >

because () is for func param, when generics layers too long people can't see clearly
l think java and typescript's generics syntax is very good.
if using <> type also can be removed

package main

import (
	"fmt"
)

func Print<T>(s []T) {
	for _, v := range s {
		fmt.Print(v)
	}
}

func main() {
	Print([]string{"Hello, ", "playground\n"})
}

2. generics param default type

func Print<T = int>(s []T) {
     // xxx
}
@davecheney
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Please see this FAQ entry.

https://go.googlesource.com/proposal/+/refs/heads/master/design/go2draft-type-parameters.md#why-not-use-the-syntax-like-c_and-java

@martisch
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This is covered in the FAQ of the design draft:
https://go.googlesource.com/proposal/+/refs/heads/master/design/go2draft-type-parameters.md#why-not-use

@martisch
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martisch commented Jun 17, 2020 •
edited

To quote ianlancetaylor from similar proposals like: #36457

Please also feel free to add a link to this issue to https://github.com/golang/go/wiki/Go2GenericsFeedback. We don't think it will be helpful to keep multiple generics syntax issues open simultaneously, spreading the discussion to too many different places.

There is also dicsussions continuing on at #15292.

Using <...> for type parameters has come up multiple times and has its own problems see e.g.: #15292 (comment) and following.

@martisch martisch added generics Issue is related to generics v2 A language change or incompatible library change LanguageChange labels Jun 17, 2020
@golang golang locked and limited conversation to collaborators Jun 17, 2021
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@davecheney @martisch @gopherbot @buffge