Control characters can be generated using ?\C-x and ?\c-x
(the control version of x is x & 0x9f).
Metacharacters (x | 0x80) can be generated using ?\M-x.
The combination of meta and control is generated using and ?\M-\C-x.
You can get the integer value of a backslash character using the sequence ?\\.
?a => 97 # ASCII character
?\n => 10 # code for a newline (0x0a)
?\C-a => 1 # control a = ?A & 0x9f = 0x01
?\M-a => 225 # meta sets bit 7
?\M-\C-a => 129 # meta and control a
?\C-? => 127 # delete character
上面的一段英文,请解释一下,还有关于Control characters的知识点?
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