From cd9c8d400c1eb9cbb4ff6a33be02f91a30ab13b2 Mon Sep 17 00:00:00 2001 From: Bram Moolenaar Date: Sat, 5 Nov 2022 23:46:43 +0000 Subject: patch 9.0.0837: append() reports failure when not appending anything Problem: append() reports failure when not appending anything. Solution: Only report failure when appending something. (closes #11498) --- runtime/doc/builtin.txt | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'runtime/doc/builtin.txt') diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt index 98fd13840f..1ee2dcbb08 100644 --- a/runtime/doc/builtin.txt +++ b/runtime/doc/builtin.txt @@ -806,8 +806,10 @@ append({lnum}, {text}) *append()* {lnum} can be zero to insert a line before the first one. {lnum} is used like with |getline()|. Returns 1 for failure ({lnum} out of range or out of memory), - 0 for success. In |Vim9| script an invalid argument or - negative number results in an error. Example: > + 0 for success. When {text} is an empty list zero is returned, + no matter the value of {lnum}. + In |Vim9| script an invalid argument or negative number + results in an error. Example: > :let failed = append(line('$'), "# THE END") :let failed = append(0, ["Chapter 1", "the beginning"]) @@ -835,7 +837,9 @@ appendbufline({buf}, {lnum}, {text}) *appendbufline()* If {buf} is not a valid buffer or {lnum} is not valid, an error message is given. Example: > :let failed = appendbufline(13, 0, "# THE START") -< +< However, when {text} is an empty list then no error is given + for an invalid {lnum}, since {lnum} isn't actually used. + Can also be used as a |method| after a List, the base is passed as the second argument: > mylist->appendbufline(buf, lnum) @@ -981,7 +985,7 @@ autocmd_add({acmds}) *autocmd_add()* let acmd.bufnr = 5 let acmd.cmd = 'call BufEnterFunc()' call autocmd_add([acmd]) - +< Can also be used as a |method|: > GetAutocmdList()->autocmd_add() < @@ -7873,9 +7877,10 @@ setbufline({buf}, {lnum}, {text}) *setbufline()* To insert lines use |appendbufline()|. Any text properties in {lnum} are cleared. - {text} can be a string to set one line, or a list of strings - to set multiple lines. If the list extends below the last - line then those lines are added. + {text} can be a string to set one line, or a List of strings + to set multiple lines. If the List extends below the last + line then those lines are added. If the List is empty then + nothing is changed and zero is returned. For the use of {buf}, see |bufname()| above. @@ -8060,7 +8065,8 @@ setline({lnum}, {text}) *setline()* When {lnum} is just below the last line the {text} will be added below the last line. {text} can be any type or a List of any type, each item is - converted to a String. + converted to a String. When {text} is an empty List then + nothing is changed and FALSE is returned. If this succeeds, FALSE is returned. If this fails (most likely because {lnum} is invalid) TRUE is returned. -- cgit v1.2.3