character constants
- From: William Adams <william_a_adams@xxxxxxx>
- To: <luajit@xxxxxxxxxxxxx>
- Date: Thu, 17 May 2012 00:41:20 +0000
Does anyone know of a set of predefined constants for characters? In C, I
typically have: switch(c){ case ' ': case '\t': // whitespace handling
break; case 'a': case 'b': break; // etc}
In lua, there are only strings right? And the single quotes are just dummies
for double quotes, so 'a' ~= single byte representation of the ascii character
a. I find myself having do to: string.byte('a'), and that can't be particular
performant. Before I go ahead and create the constants for all the ascii
characters, is there a better way of doing this, or some magical character I
can put in front of a string literal to get the constant for the first
character without having to make a function call? I wish Lua would have
followed the C convention of single quote means ascii code of a single
character, and double quote is for strings. I mean, we also have [[ ]] for
string literals, and we have escape sequences for everything else, so I don't
see the need to use both single and double quotes for strings. But then again,
I wasn't there at the beginning, so I'm sure the design choice made sense at
the time. -- William
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