diff options
Diffstat (limited to 'runtime/doc/vim9.txt')
| -rw-r--r-- | runtime/doc/vim9.txt | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt index bde3c9b7b1..016089a87c 100644 --- a/runtime/doc/vim9.txt +++ b/runtime/doc/vim9.txt @@ -1,4 +1,4 @@ -*vim9.txt* For Vim version 8.2. Last change: 2021 Feb 03 +*vim9.txt* For Vim version 8.2. Last change: 2021 Feb 23 VIM REFERENCE MANUAL by Bram Moolenaar @@ -279,8 +279,8 @@ without any command. The same for global, window, tab, buffer and Vim variables, because they are not really declared. They can also be deleted with `:unlet`. -Variables and functions cannot shadow previously defined or imported variables -and functions. +Variables, functions and function arguments cannot shadow previously defined +or imported variables and functions in the same script file. Variables may shadow Ex commands, rename the variable if needed. Global variables and user defined functions must be prefixed with "g:", also @@ -307,14 +307,14 @@ Example: > const myList = [1, 2] myList = [3, 4] # Error! myList[0] = 9 # Error! - muList->add(3) # Error! + myList->add(3) # Error! < *:final* `:final` is used for making only the variable a constant, the value can be changed. This is well known from Java. Example: > final myList = [1, 2] myList = [3, 4] # Error! myList[0] = 9 # OK - muList->add(3) # OK + myList->add(3) # OK It is common to write constants as ALL_CAPS, but you don't have to. @@ -412,7 +412,7 @@ NOT IMPLEMENTED YET *vim9-curly* To avoid the "{" of a dictionary literal to be recognized as a statement block -wrap it in parenthesis: > +wrap it in parentheses: > var Lambda = (arg) => ({key: 42}) Also when confused with the start of a command block: > @@ -1029,10 +1029,14 @@ an error, thus breaking backwards compatibility. For example: - Using a number where a string is expected. *E1024* One consequence is that the item type of a list or dict given to map() must -not change. This will give an error in compiled code: > +not change. This will give an error in Vim9 script: > map([1, 2, 3], (i, v) => 'item ' .. i) - E1012: Type mismatch; expected list<number> but got list<string> -Instead use |mapnew()|. + E1012: Type mismatch; expected number but got string +Instead use |mapnew()|. If the item type was determined to be "any" it can +change to a more specific type. E.g. when a list of mixed types gets changed +to a list of numbers. +Same for |extend()|, use |extendnew()| instead, and for |flatten()|, use +|flattennew()| instead. ============================================================================== @@ -1084,7 +1088,7 @@ There is one way to use both legacy and Vim9 syntax in one script file: > vim9script # Vim9 script commands go here This allows for writing a script that takes advantage of the Vim9 script -syntax if possible, but will also work on an Vim version without it. +syntax if possible, but will also work on a Vim version without it. This can only work in two ways: 1. The "if" statement evaluates to false, the commands up to `endif` are |