diff options
| author | Jan Edmund Lazo <jan.lazo@mail.utoronto.ca> | 2021-04-08 22:33:21 -0400 |
|---|---|---|
| committer | Jan Edmund Lazo <jan.lazo@mail.utoronto.ca> | 2021-04-08 22:36:20 -0400 |
| commit | 0d0eeff8a34b01db93fb271fbeac3ad2d372a0e0 (patch) | |
| tree | 9ad6ef39f8578c2c22bd0cf3ddd5afeb18bcd9c1 /runtime | |
| parent | ec273a2c6ba055810539f2d58353c9c0fc8db320 (diff) | |
| download | rneovim-0d0eeff8a34b01db93fb271fbeac3ad2d372a0e0.tar.gz rneovim-0d0eeff8a34b01db93fb271fbeac3ad2d372a0e0.tar.bz2 rneovim-0d0eeff8a34b01db93fb271fbeac3ad2d372a0e0.zip | |
eval: add v:_null_string
Replacement for Vim's test_null_string().
Vim uses it to verify that its codebase handles null strings.
Preparation for the Test_null_list() in patch v8.2.1822.
Use v:_null_string, not non-existent env var, for null string tests.
Mention v:_null_string in id() because id(v:_null_string) returns (nil).
Diffstat (limited to 'runtime')
| -rw-r--r-- | runtime/doc/eval.txt | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt index 00b1be013a..c3736d9a3e 100644 --- a/runtime/doc/eval.txt +++ b/runtime/doc/eval.txt @@ -5563,13 +5563,14 @@ id({expr}) *id()* Returns a |String| which is a unique identifier of the container type (|List|, |Dict| and |Partial|). It is guaranteed that for the mentioned types `id(v1) ==# id(v2)` - returns true iff `type(v1) == type(v2) && v1 is v2` (note: - |v:_null_list| and |v:_null_dict| have the same `id()` with - different types because they are internally represented as - a NULL pointers). Currently `id()` returns a hexadecimal - representanion of the pointers to the containers (i.e. like - `0x994a40`), same as `printf("%p", {expr})`, but it is advised - against counting on exact format of return value. + returns true iff `type(v1) == type(v2) && v1 is v2`. + Note that |v:_null_string|, |v:_null_list|, and |v:_null_dict| + have the same `id()` with different types because they are + internally represented as a NULL pointers. `id()` returns a + hexadecimal representanion of the pointers to the containers + (i.e. like `0x994a40`), same as `printf("%p", {expr})`, + but it is advised against counting on the exact format of + return value. It is not guaranteed that `id(no_longer_existing_container)` will not be equal to some other `id()`: new containers may |