add hw2

node_modules/@iconify/utils/lib/emoji/regex/base.js

@@ -0,0 +1,208 @@
+/**
+* Convert number to string
+*/
+function toString(number) {
+	if (number < 255) {
+		if (number > 32 && number < 127) {
+			const char = String.fromCharCode(number);
+			if (number > 47 && number < 58 || number > 64 && number < 91 || number > 94 && number < 123) return char;
+			return "\\" + char;
+		}
+		return "\\x" + (number < 16 ? "0" : "") + number.toString(16).toUpperCase();
+	}
+	return "\\u" + number.toString(16).toUpperCase();
+}
+/**
+* Typescript stuff
+*/
+function assertNever(v) {}
+/**
+* Wrap regex in group
+*/
+function wrapRegexInGroup(regex) {
+	return "(?:" + regex + ")";
+}
+/**
+* Update UTF16 item, return regex
+*/
+function updateUTF16EmojiRegexItem(item) {
+	const numbers = item.numbers;
+	if (numbers.length === 1) {
+		const num = numbers[0];
+		return item.regex = toString(num);
+	}
+	numbers.sort((a, b) => a - b);
+	const chars = [];
+	let range = null;
+	const addRange = () => {
+		if (range) {
+			const { start, last, numbers: numbers$1 } = range;
+			range = null;
+			if (last > start + 1) chars.push(toString(start) + "-" + toString(last));
+			else for (let i = 0; i < numbers$1.length; i++) chars.push(toString(numbers$1[i]));
+		}
+	};
+	for (let i = 0; i < numbers.length; i++) {
+		const num = numbers[i];
+		if (range) {
+			if (range.last === num) continue;
+			if (range.last === num - 1) {
+				range.numbers.push(num);
+				range.last = num;
+				continue;
+			}
+		}
+		addRange();
+		range = {
+			start: num,
+			last: num,
+			numbers: [num]
+		};
+	}
+	addRange();
+	if (!chars.length) throw new Error("Unexpected empty range");
+	return item.regex = "[" + chars.join("") + "]";
+}
+/**
+* Create UTF-16 regex
+*/
+function createUTF16EmojiRegexItem(numbers) {
+	const result = {
+		type: "utf16",
+		regex: "",
+		numbers,
+		length: 1,
+		group: true
+	};
+	updateUTF16EmojiRegexItem(result);
+	return result;
+}
+/**
+* Update sequence regex. Does not update group
+*/
+function updateSequenceEmojiRegexItem(item) {
+	return item.regex = item.items.map((childItem) => {
+		if (!childItem.group && childItem.type === "set") return wrapRegexInGroup(childItem.regex);
+		return childItem.regex;
+	}).join("");
+}
+/**
+* Create sequence regex
+*/
+function createSequenceEmojiRegexItem(sequence, numbers) {
+	let items = [];
+	sequence.forEach((item) => {
+		if (item.type === "sequence") items = items.concat(item.items);
+		else items.push(item);
+	});
+	if (!items.length) throw new Error("Empty sequence");
+	const result = {
+		type: "sequence",
+		items,
+		regex: "",
+		length: items.reduce((length, item) => item.length + length, 0),
+		group: false
+	};
+	if (sequence.length === 1) {
+		const firstItem = sequence[0];
+		result.group = firstItem.group;
+		if (firstItem.type !== "optional") {
+			const numbers$1 = firstItem.numbers;
+			if (numbers$1) result.numbers = numbers$1;
+		}
+	}
+	if (numbers) result.numbers = numbers;
+	updateSequenceEmojiRegexItem(result);
+	return result;
+}
+/**
+* Update set regex and group
+*/
+function updateSetEmojiRegexItem(item) {
+	if (item.sets.length === 1) {
+		const firstItem = item.sets[0];
+		item.group = firstItem.group;
+		return item.regex = firstItem.regex;
+	}
+	item.group = false;
+	return item.regex = item.sets.map((childItem) => childItem.regex).join("|");
+}
+/**
+* Create set regex
+*/
+function createSetEmojiRegexItem(set) {
+	let sets = [];
+	let numbers = [];
+	set.forEach((item) => {
+		if (item.type === "set") sets = sets.concat(item.sets);
+		else sets.push(item);
+		if (numbers) if (item.type === "optional" || !item.numbers) numbers = null;
+		else numbers = [...numbers, ...item.numbers];
+	});
+	sets.sort((a, b) => {
+		if (a.length === b.length) return a.regex.localeCompare(b.regex);
+		return b.length - a.length;
+	});
+	const result = {
+		type: "set",
+		sets,
+		regex: "",
+		length: sets.reduce((length, item) => length ? Math.min(length, item.length) : item.length, 0),
+		group: false
+	};
+	if (numbers) result.numbers = numbers;
+	if (set.length === 1) {
+		const firstItem = set[0];
+		result.group = firstItem.group;
+	}
+	updateSetEmojiRegexItem(result);
+	return result;
+}
+/**
+* Update optional regex
+*/
+function updateOptionalEmojiRegexItem(item) {
+	const childItem = item.item;
+	const regex = (childItem.group ? childItem.regex : wrapRegexInGroup(childItem.regex)) + "?";
+	return item.regex = regex;
+}
+/**
+* Create optional item
+*/
+function createOptionalEmojiRegexItem(item) {
+	if (item.type === "optional") return item;
+	const result = {
+		type: "optional",
+		item,
+		regex: "",
+		length: item.length,
+		group: true
+	};
+	updateOptionalEmojiRegexItem(result);
+	return result;
+}
+/**
+* Clone item
+*/
+function cloneEmojiRegexItem(item, shallow = false) {
+	const result = { ...item };
+	if (result.type !== "optional" && result.numbers) result.numbers = [...result.numbers];
+	switch (result.type) {
+		case "utf16": break;
+		case "sequence":
+			if (shallow) result.items = [...result.items];
+			else result.items = result.items.map((item$1) => cloneEmojiRegexItem(item$1, false));
+			break;
+		case "set":
+			if (shallow) result.sets = [...result.sets];
+			else result.sets = result.sets.map((item$1) => cloneEmojiRegexItem(item$1, false));
+			break;
+		case "optional":
+			if (!shallow) result.item = cloneEmojiRegexItem(result.item, false);
+			break;
+		default: assertNever(result);
+	}
+	return result;
+}
+
+export { cloneEmojiRegexItem, createOptionalEmojiRegexItem, createSequenceEmojiRegexItem, createSetEmojiRegexItem, createUTF16EmojiRegexItem, updateOptionalEmojiRegexItem, updateSequenceEmojiRegexItem, updateSetEmojiRegexItem, updateUTF16EmojiRegexItem, wrapRegexInGroup };