Mercurial > vim
comparison runtime/doc/vim9.txt @ 26346:8be6413a8e27 v8.2.3704
patch 8.2.3704: Vim9: cannot use a list declaration in a :def function
Commit: https://github.com/vim/vim/commit/ab36e6ae7b87b0295fb19270e4339a734875c6b1
Author: Bram Moolenaar <Bram@vim.org>
Date: Tue Nov 30 16:14:49 2021 +0000
patch 8.2.3704: Vim9: cannot use a list declaration in a :def function
Problem: Vim9: cannot use a list declaration in a :def function.
Solution: Make it work.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Tue, 30 Nov 2021 17:15:03 +0100 |
| parents | bb2175e5ccee |
| children | 80b555c4aed0 |
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| 26345:1707aa6d46a2 | 26346:8be6413a8e27 |
|---|---|
| 418 similar to how a function argument can be ignored: > | 418 similar to how a function argument can be ignored: > |
| 419 [a, _, c] = theList | 419 [a, _, c] = theList |
| 420 To ignore any remaining items: > | 420 To ignore any remaining items: > |
| 421 [a, b; _] = longList | 421 [a, b; _] = longList |
| 422 | 422 |
| 423 < *E1092* | |
| 424 Declaring more than one variable at a time, using the unpack notation, is | 423 Declaring more than one variable at a time, using the unpack notation, is |
| 425 currently not supported: > | 424 possible. Each variable can have a type or infer it from the value: > |
| 426 var [v1, v2] = GetValues() # Error! | 425 var [v1: number, v2] = GetValues() |
| 427 That is because the type needs to be inferred from the list item type, which | 426 Use this only when there is a list with values, declaring one variable per |
| 428 isn't that easy. | 427 line is much easier to read and change later. |
| 429 | 428 |
| 430 | 429 |
| 431 Constants ~ | 430 Constants ~ |
| 432 *vim9-const* *vim9-final* | 431 *vim9-const* *vim9-final* |
| 433 How constants work varies between languages. Some consider a variable that | 432 How constants work varies between languages. Some consider a variable that |