diff options
| -rw-r--r-- | runtime/doc/map.txt | 14 | ||||
| -rw-r--r-- | src/nvim/testdir/test_mapping.vim | 24 |
2 files changed, 38 insertions, 0 deletions
diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt index edec4a8de7..3ee26b0817 100644 --- a/runtime/doc/map.txt +++ b/runtime/doc/map.txt @@ -224,6 +224,20 @@ text before the cursor and start omni completion when some condition is met. For abbreviations |v:char| is set to the character that was typed to trigger the abbreviation. You can use this to decide how to expand the {lhs}. You should not either insert or change the v:char. + +Also, keep in mind that the expression may be evaluated when looking for +typeahead, before the previous command has been executed. For example: > + func StoreColumn() + let g:column = col('.') + return 'x' + endfunc + nnoremap <expr> x StoreColumn() + nmap ! f!x +You will notice that g:column has the value from before executing "fx", +because "z" is evaluated before "fx" is executed. +This can be solved by inserting <Ignore> before the character that is +expression-mapped: > + nmap ! f!<Ignore>x Be very careful about side effects! The expression is evaluated while obtaining characters, you may very well make the command dysfunctional. diff --git a/src/nvim/testdir/test_mapping.vim b/src/nvim/testdir/test_mapping.vim index c4807797ff..0191dbf33e 100644 --- a/src/nvim/testdir/test_mapping.vim +++ b/src/nvim/testdir/test_mapping.vim @@ -427,6 +427,30 @@ func Test_error_in_map_expr() exe buf .. 'bwipe!' endfunc +func Test_expr_map_gets_cursor() + new + call setline(1, ['one', 'some w!rd']) + func StoreColumn() + let g:exprLine = line('.') + let g:exprCol = col('.') + return 'x' + endfunc + nnoremap <expr> x StoreColumn() + 2 + nmap ! f!<Ignore>x + call feedkeys("!", 'xt') + call assert_equal('some wrd', getline(2)) + call assert_equal(2, g:exprLine) + call assert_equal(7, g:exprCol) + + bwipe! + unlet g:exprLine + unlet g:exprCol + delfunc StoreColumn + nunmap x + nunmap ! +endfunc + " Test for mapping errors func Test_map_error() call assert_fails('unmap', 'E474:') |