src/main/java/com/github/fge/grappa/parsers/BaseParser.java
@DontLabel
    public Rule anyOf(final char[] characters)
    {
        Objects.requireNonNull(characters);
        switch (characters.length) {
            case 0:
                throw new IllegalArgumentException("empty character array");
            case 1:
                return ch(characters[0]);
            default:
                return anyOf(Characters.of(characters));
        }
    }
@DontLabel
    public Rule anyOf(final char[] characters)
    {
        Objects.requireNonNull(characters);
        switch (characters.length) {
            case 0:
                throw new IllegalArgumentException("empty character array");
            case 1:
                return ch(characters[0]);
            default:
                return anyOf(Characters.of(characters));
        }
    }
Match any character in the given {@code char} array

<p>This method delegates to {@link #anyOf(Characters)}.</p>

@param characters the characters
@return a rule

@see #anyOf(Characters)