Method valueOf

src/backend/mi_parse.ts:80–124

(start: any, path: string)

	}

	static valueOf(start: any, path: string): any {
		if (!start)
			return undefined;
		const pathRegex = /^\.?([a-zA-Z_\-][a-zA-Z0-9_\-]*)/;
		const indexRegex = /^\[(\d+)\](?:$|\.)/;
		path = path.trim();
		if (!path)
			return start;
		let current = start;
		do {
			let target = pathRegex.exec(path);
			if (target) {
				path = path.substring(target[0].length);
				if (current.length && typeof current != "string") {
					const found = [];
					for (const element of current) {
						if (element[0] == target[1]) {
							found.push(element[1]);
						}
					}
					if (found.length > 1) {
						current = found;
					} else if (found.length == 1) {
						current = found[0];
					} else return undefined;
				} else return undefined;
			} else if (path[0] == '@') {
				current = [current];
				path = path.substring(1);
			} else {
				target = indexRegex.exec(path);
				if (target) {
					path = path.substring(target[0].length);
					const i = parseInt(target[1]);
					if (current.length && typeof current != "string" && i >= 0 && i < current.length) {
						current = current[i];
					} else if (i == 0) {
						// empty
					} else return undefined;
				} else return undefined;
			}
			path = path.trim();
		} while (path);
		return current;
	}
}

const tokenRegex = /^\d+/;