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Go 2: Make life easier #28760

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pjebs opened this issue Nov 13, 2018 · 4 comments
Closed

Go 2: Make life easier #28760

pjebs opened this issue Nov 13, 2018 · 4 comments
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@pjebs
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pjebs commented Nov 13, 2018 •
edited

Suppose I have a variable:

Example 1:

var x *int
x = &5 // This fails.

Example 2:

var t *time.Time
t = &time.Now() // this fails

The recommended way is:


var x *int

var dummy int = 5 
x = &dummy // This works

Or

var t *time.Time

var dummy time.Time = time.Now()
t = &dummy // This works

This is annoying. Having to create dummy variables just to do this.

There is also an "apparent" inconsistency (despite following similar semantics to above):

type A struct {}

var x *A

x = &A{} // This is allowed
@pjebs
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pjebs commented Nov 13, 2018 •
edited

My proposal is to provide this syntax sugar:

Example 1:

var x *int
x = &5  equivalent to  x = &[]int{5}[0]

Example 2:

var t *time.Time
t = &time.Now()  equivalent to   t = &[]time.Time{time.Now()}[0]

@pjebs pjebs changed the title Go 2: Make it easier to set pointer variables Go 2: Make life easier Nov 13, 2018
@pjebs
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pjebs commented Nov 13, 2018 •
edited

I see this dummy variable style absolutely everywhere in goland. It is annoying.
The alternative (temporary slice) which I use everywhere is more verbose and looks revolting.

My doctor has given me a magic pill to minimise my migraines due being stuck between a rock and a hard place.

@randall77
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Dup of #9097 (and more directly of #19966, which was closed in favor of #9097). Closing as a dup.

@pjebs
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pjebs commented May 25, 2019

I've created https://github.com/rocketlaunchr/igo to demo how it can be used.

@golang golang locked and limited conversation to collaborators May 24, 2020
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@pjebs @randall77 @gopherbot