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Diffstat (limited to 'runtime/doc/vim9.txt')
| -rw-r--r-- | runtime/doc/vim9.txt | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt index 4e5d2f3fef..86879dde84 100644 --- a/runtime/doc/vim9.txt +++ b/runtime/doc/vim9.txt @@ -65,6 +65,35 @@ rewrite old scripts, they keep working as before. You may want to use a few THIS IS STILL UNDER DEVELOPMENT - ANYTHING CAN BREAK - ANYTHING CAN CHANGE +Overview ~ + +Brief summary of the differences you will most often encounter when using Vim9 +script and `:def` functions; details are below: +- Comments start with #, not ": > + echo "hello" # comment +- Using a backslash for line continuation is hardly ever needed: > + echo "hello " + .. yourName + .. ", how are you?" +- White space is required in many places. +- Assign values without `:let`, declare variables with `:var`: > + var count = 0 + count += 3 +- Constants can be declared with `:final` and `:const`: > + final matches = [] # add matches + const names = ['Betty', 'Peter'] # cannot be changed +- `:final` cannot be used as an abbreviation of `:finally`. +- Variables and functions are script-local by default. +- Functions are declared with argument types and return type: > + def CallMe(count: number, message: string): bool +- Call functions without `:call`: > + writefile(['done'], 'file.txt') +- You cannot use `:xit`, `:t`, `:append`, `:change`, `:insert` or curly-braces + names. +- A range before a command must be prefixed with a colon: > + :%s/this/that + + Comments starting with # ~ In legacy Vim script comments start with double quote. In Vim9 script |