The documentation explicitly states that moving the cursor is okay in
an indentexpr, but this is only true when moved directly with cursor(),
setpos(), search(), etc. Moving the cursor via `normal! w` has side
effects that frustrate the attempts of get_expr_indent() to restore the
original cursor position. However, this is not apparent without reading
the source.
For example:
function! BadIndentExpr()
normal! $
return 8
endfunction
setlocal indentexpr=BadIndentExpr()
The cursor position is not restored when indenting the current line.
---
runtime/doc/options.txt | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 3beb2b0..b0ea21c 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -4162,7 +4162,8 @@ A jump table for the options with a short description can
be found at |Q_op|.
and |lispindent()|.
The evaluation of the expression must not have side effects! It must
not change the text, jump to another window, etc. Afterwards the
- cursor position is always restored, thus the cursor may be moved.
+ cursor position is always restored, thus the cursor may be moved (but
+ not via |:normal| commands).
Normally this option would be set to call a function: >
:set indentexpr=GetMyIndent()
< Error messages will be suppressed, unless the 'debug' option contains
--
1.8.1.2
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