Re: Vim9: E1096 Returning a value in a function without return type

On 2021-05-08, Bram Moolenaar <Bram@moolenaar.net> wrote:
>
> Christian wrote:
>
>> I am getting the error in the subject in a script I am writing. I have
>> found that the culprit is the use of statements in a lambda.
>>
>> This is a minimal example showing the problem:
>>
>> vim9script
>>
>> def Bind(x: number): func(string): any
>> return (s) => x
>> enddef
>>
>> def Bind2(x: number): func(string): any
>> return (s) => {
>> return x
>> }
>> enddef
>>
>> var B = Bind(42)
>> var B2 = Bind2(42)
>>
>> While Bind() is executed correctly, Bind2() raises the error. Am I doing
>> something wrong?
>>
>> (This is of course a contrived example: in my script, the lambda
>> contains a few statements, so I must use {}).
>
> You are missing the return type in the lambda:
>
> def Bind2(x: number): func(string): any
> return (s): any => { # ": any" added here
> return x
> }
> enddef

Thanks, that worked!

> Perhaps it's a bit strange that the argument doesn't require a type but
> the return type is required...

That's fine with me. The only issue is that I don't think that this is
documented yet (unless I missed it).

Thanks,
Life.

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/vim_use/s761ka%246ni%241%40ciao.gmane.io.