const LETTER_REGEX = /(\p{Letter}|\d|_)/u;
const WHITESPACE_REGEX = /\s/;
export const isLetter = (char) => LETTER_REGEX.test(char[0]);
export const isWhitespace = (char) => WHITESPACE_REGEX.test(char[0]);
export const isPunctuation = (char) => !isLetter(char) && !isWhitespace(char);
/**
 * Compares two block slice types, ignores tag discriminants.
 */
export const stepsEqual = (a, b) => {
    const lenA = a.length;
    const lenB = b.length;
    if (lenA !== lenB)
        return false;
    for (let i = 0; i < lenA; i++) {
        const stepA = a[i];
        const stepB = b[i];
        const tagA = Array.isArray(stepA) ? stepA[0] : stepA;
        const tagB = Array.isArray(stepB) ? stepB[0] : stepB;
        if (tagA !== tagB)
            return false;
    }
    return true;
};
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