diff options
Diffstat (limited to 'runtime/doc/eval.txt')
| -rw-r--r-- | runtime/doc/eval.txt | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt index 6e7090acdf..95d14ef5b2 100644 --- a/runtime/doc/eval.txt +++ b/runtime/doc/eval.txt @@ -3224,14 +3224,32 @@ declarations and assignments do not use a command. |vim9-declaration| *:let=<<* *:let-heredoc* *E990* *E991* *E172* *E221* *E1145* -:let {var-name} =<< [trim] {endmarker} +:let {var-name} =<< [trim] [eval] {endmarker} text... text... {endmarker} Set internal variable {var-name} to a |List| containing the lines of text bounded by the string - {endmarker}. The lines of text is used as a - |literal-string|. + {endmarker}. + + If "eval" is not specified, then each line of text is + used as a |literal-string|. If "eval" is specified, + then any Vim expression in the form ``={expr}`` is + evaluated and the result replaces the expression. + Example where $HOME is expanded: > + let lines =<< trim eval END + some text + See the file `=$HOME`/.vimrc + more text + END +< There can be multiple Vim expressions in a single line + but an expression cannot span multiple lines. If any + expression evaluation fails, then the assignment fails. + once the "`=" has been found {expr} and a backtick + must follow. {expr} cannot be empty. + Currenty, in a compiled function {expr} is evaluated + when compiling the function, THIS WILL CHANGE. + {endmarker} must not contain white space. {endmarker} cannot start with a lower case character. The last line should end only with the {endmarker} @@ -3281,6 +3299,13 @@ text... 1 2 3 4 5 6 7 8 DATA + + let code =<< trim eval CODE + let v = `=10 + 20` + let h = "`=$HOME`" + let s = "`=Str1()` abc `=Str2()`" + let n = `=MyFunc(3, 4)` + CODE < *E121* :let {var-name} .. List the value of variable {var-name}. Multiple |