protected char LA(final int index) {
		final int i = pos + index - 1;
		return i < _input.length() && i >= 0 ? _input.charAt(i) : EOF;
	}
Create a new tokenizer from the given character sequence.

@param input the input character sequence
@throws NullPointerException if the given {@code input} is {@code null}
jenetics.ext/src/main/java/io/jenetics/ext/internal/parser/CharSequenceTokenizer.java