Vim语法文件：向iskeyword添加某些字符无效

我正在制作一个Vim语法文件,我需要在iskeyword选项中添加一些字符.我无法从Vim帮助文件中找出它是如何工作的,但这是我目前所写的：

set iskeyword+=_,.,-,64,133,!,?,@,172,8743,8744,8853,8592,8593,8594,8595,8596

#64和#133是at符号和省略号.最后几个字符是¬,∧,∨,⊕,→,←,↓,↑和↔.

在所有这些字符中,只有_,– 和¬(#172)似乎被识别为关键字字符.

我还有别的办法吗？或者Vim根本不支持超出Unicode特定点的关键字字符(但是at符号也没有被识别,并且这肯定在ASCII中)？

谢谢你的帮助！

解决方法

iskeyword的帮助指向isfname的帮助,它可以回答您的所有问题：

[…]
Multi-byte characters 256 and above are always included,only the
characters up to 255 are specified with this option.
For UTF-8 the characters 0xa0 to 0xff are included as well.
[…]
The format of this option is a list of parts,separated with commas.
Each part can be a single character number or a range.  A range is two
character numbers with '-' in between.  A character number can be a
decimal number between 0 and 255 or the ASCII character itself (does
not work for digits).  Example:
[…]
If the character is '@',all characters where isalpha() returns TRUE
are included.  normally these are the characters a to z and A to Z,plus accented characters.  To include '@' itself use "@-@".  Examples:
    "@,^a-z"    All alphabetic characters,excluding lower
            case ASCII letters.
    "a-z,A-Z,@-@"   All letters plus the '@' character.
[…]

>“此选项仅指定最多255个字符.”
>“字符数可以是0到255之间的十进制数”
>“包含’@’本身使用”@ – @“”

在iskeyword中包含多字节字符已在许多列表中讨论过,如this one.