asBool() {
		if (this.truthy) return true;
		if (this.falsy || this.nullish) return false;
		if (this.isBoolean()) return this.bool;
		if (this.isNull()) return false;
		if (this.isUndefined()) return false;
		if (this.isString()) return this.string !== "";
		if (this.isNumber()) return this.number !== 0;
		if (this.isBigInt()) return this.bigint !== BigInt(0);
		if (this.isRegExp()) return true;
		if (this.isArray()) return true;
		if (this.isConstArray()) return true;
		if (this.isWrapped()) {
			return (this.prefix && this.prefix.asBool()) ||
				(this.postfix && this.postfix.asBool())
				? true
				: undefined;
		}
		if (this.isTemplateString()) {
			const str = this.asString();
			if (typeof str === "string") return str !== "";
		}
	}
Creates a boolean representation of this evaluated expression.
@returns {boolean | undefined} true: truthy, false: falsy, undefined: unknown