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| author | Bram Moolenaar <Bram@vim.org> | 2019-06-15 15:45:06 +0200 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2019-06-15 15:45:06 +0200 |
| commit | 9937a055437ef67b57a1bdec8f0799b669c9dbf0 (patch) | |
| tree | 64fee6ad078086b7714995b03cb7891641d13533 /runtime/doc/eval.txt | |
| parent | dfa97f2aed3d8ca195d09e2ce91cef227f933961 (diff) | |
| download | vim-git-9937a055437ef67b57a1bdec8f0799b669c9dbf0.tar.gz | |
patch 8.1.1539: not easy to define a variable and lock itv8.1.1539
Problem: Not easy to define a variable and lock it.
Solution: Add ":const".
Diffstat (limited to 'runtime/doc/eval.txt')
| -rw-r--r-- | runtime/doc/eval.txt | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt index da45de805..ca3f4ca06 100644 --- a/runtime/doc/eval.txt +++ b/runtime/doc/eval.txt @@ -11598,8 +11598,31 @@ text... No error message is given for a non-existing variable, also without !. If the system does not support deleting an environment - variable, it is made emtpy. - + variable, it is made empty. + + *:cons* *:const* *E996* +:cons[t] {var-name} = {expr1} +:cons[t] [{name1}, {name2}, ...] = {expr1} +:cons[t] [{name1}, {name2}, ...] .= {expr1} +:cons[t] [{name}, ..., ; {lastname}] = {expr1} +:cons[t] {var-name} =<< [trim] {marker} +text... +text... +{marker} + Similar to |:let|, but additionally lock the variable + after setting the value. This is the same as locking + the variable with |:lockvar| just after |:let|, thus: > + :const x = 1 +< is equivalent to: > + :let x = 1 + :lockvar 1 x +< This is useful if you want to make sure the variable + is not modified. + *E995* + |:const| does not allow to for changing a variable. > + :let x = 1 + :const x = 2 " Error! +< :lockv[ar][!] [depth] {name} ... *:lockvar* *:lockv* Lock the internal variable {name}. Locking means that it can no longer be changed (until it is unlocked). |