如何讀取有問題修飾符的字符串？

Question

我無法在Emacs上讀取像"D\xC3\xA9cada"Década這樣的字符串。顯然，它試圖找到對應\xA9cada，有效的十六進制字符，並沒有找到它，返回以下錯誤：

ELISP> "D\xC3\xA9cada" 
*** Read error *** Invalid modifier in string 

有什麼方法來限制讀者發現前兩個修飾語超出x的字符或一般解決方法？在這種情況下，替換'\ xA9'作爲'\ 251'將起作用，但可能不會出現在字符串'\ xA9000'中。

謝謝！

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編輯：最後，我不得不改變串生成程序，考慮到這一點。每個序列都會附加'\'。在紅寶石：puts string.gsub(/(\\x[0-9A-F][0-9A-F])([0-9A-Fa-f])/,'\1\\\\ \2')

Answer 1

見Emacs Lisp manual：

You can also represent a multibyte non-ASCII character with its character code: use a hex escape, ‘\xnnnnnnn’, with as many digits as necessary. (Multibyte non-ASCII character codes are all greater than 256.) Any character which is not a valid hex digit terminates this construct. If the next character in the string could be interpreted as a hex digit, write ‘\ ’ (backslash and space) to terminate the hex escape—for example, ‘\x8e0\ ’ represents one character, ‘a’ with grave accent. ‘\ ’ in a string constant is just like backslash-newline; it does not contribute any character to the string, but it does terminate the preceding hex escape.