V: Support local functions

[radare]

V version: V 0.1.25 c12985d
OS: macOS 10.15

What did you do?

$ cat test_local_function.v
fn main() {
    fn local() {
        println('hello world')
    }
    local()
}
$ v run test_local_function.v

What did you expect to see?

hello world

What did you see instead?

` $ v run test_local_function.v test_local_function.v:2:3: unexpected token: `fn` 1| fn main() { 2| fn local() { ^ 3| println('hello world') 4| }

[changrui]

oh, no! You can use inline functions instead.

[inline]
fn local() {
    .....
}

[radare]

inline functions dont have access to the local variables and the scope is global, so it's not a solution. also this inline attribute doesn't work for local functions either

$ v run test_local_function.v
test_local_function.v:2:8: undefined: `inline`
    1| fn main() {
    2|  [inline]
                ^
    3|  fn local() {
    4|      println('hello world')

[r-k-o]

I asked for that many times and i think it should be implemented.

[medvednikov]

it's actually almost completely implemented in the new parser

the syntax is

local := fn() {
        println('hello world')
    }

[radare]

$ v run test_local_function.v
next token = {
test_local_function.v:2:16: syntax error: unexpected ), expecting name
1| fn main() {
2| local := fn() {
^
3| println('hello world')
4| }

On 21 Mar 2020, at 20:23, Alexander Medvednikov [e-mail] wrote:

it's actually almost completely implemented in the new parser

the syntax is

local := fn() {
println('hello world')
}
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[nedpals]

@radare Like @medvednikov said, it's almost completely implemented so you cannot use it right now (as your error message suggests)

[radare]

ok thank you :) let me know when i can help/test.

On 25 Mar 2020, at 11:45, Ned Palacios [e-mail] wrote:

@radare https://github.com/radare Like @medvednikov https://github.com/medvednikov said, it's almost completely implemented so you cannot use it right now (as your error message suggests)

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[RiordanIX]

Update: Anonymous functions are in. They don't have local scope, pretty sure that is planned though.