Vim 语法文件：向 iskeyword 添加某些字符不起作用

Question

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。我很难从 Vim 帮助文件中弄清楚它是如何工作的，但这是我目前写的：

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，似乎只有 _、.、- 和 ¬ (#172) 被识别为关键字字符。

我还有什么需要做的吗？还是 Vim 根本不支持超过 Unicode 中某个点的关键字字符（但 at 符号也不被识别，而且肯定在 ASCII 范围内）？

感谢您的帮助！

Answer 1

iskeyword 的帮助指向isfname 的帮助，它回答了你所有的问题：

[…]
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.
[…]

1. “此选项仅指定最多 255 个字符。”
2. “字符数可以是 0 到 255 之间的十进制数”
3. “要包含 '@' 本身，请使用“@-@””

在iskeyword 中包含多字节字符已经在许多列表中讨论过，例如this one。