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Diffstat (limited to 'runtime/doc/vim9class.txt')
| -rw-r--r-- | runtime/doc/vim9class.txt | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/runtime/doc/vim9class.txt b/runtime/doc/vim9class.txt index ba821c1b29..a00a5b787d 100644 --- a/runtime/doc/vim9class.txt +++ b/runtime/doc/vim9class.txt @@ -1,4 +1,4 @@ -*vim9class.txt* For Vim version 9.1. Last change: 2024 Jan 12 +*vim9class.txt* For Vim version 9.1. Last change: 2024 Mar 03 VIM REFERENCE MANUAL by Bram Moolenaar @@ -710,6 +710,32 @@ The initialization isn't needed, the list is empty by default. *E1330* Some types cannot be used, such as "void", "null" and "v:none". +Builtin Object Methods ~ + *builtin-object-methods* +Some of the builtin functions like |empty()|, |len()| and |string()| can be +used with an object. An object can implement a method with the same name as +these builtin functions to return an object-specific value. + + *E1412* +The following builtin methods are supported: + *object-empty()* + empty() Invoked by the |empty()| function to check whether an object is + empty. If this method is missing, then true is returned. This + method should not accept any arguments and must return a boolean. + *object-len()* + len() Invoked by the |len()| function to return the length of an + object. If this method is missing in the class, then an error is + given and zero is returned. This method should not accept any + arguments and must return a number. + *object-string()* + string() Invoked by the |string()| function to get a textual + representation of an object. Also used by the |:echo| command + for an object. If this method is missing in the class, then a + built-in default textual representation is used. This method + should not accept any arguments and must return a string. + + *E1413* +A class method cannot be used as a builtin method. Defining an interface ~ *Interface* *:interface* *:endinterface* |