blank project

node_modules/regex/src/pattern.js

@@ -0,0 +1,45 @@
+class Pattern {
+  #value;
+  /** @param {string} value */
+  constructor(value) {
+    this.#value = value;
+  }
+  /** @returns {string} */
+  toString() {
+    return String(this.#value);
+  }
+}
+
+/**
+Returns a value that can be interpolated into a `regex` template string without having its special
+characters escaped.
+
+Can be called as a function or template tag:
+- `pattern(value)` - String or value coerced to string.
+- `` pattern`…` `` - Same as ``pattern(String.raw`…`)``.
+
+@overload
+@param {string | number} value
+@returns {Pattern}
+
+@overload
+@param {TemplateStringsArray} template
+@param {...string} substitutions
+@returns {Pattern}
+*/
+function pattern(first, ...substitutions) {
+  if (Array.isArray(first?.raw)) {
+    return new Pattern(
+      // Intersperse raw template strings and substitutions
+      first.raw.flatMap((raw, i) => i < first.raw.length - 1 ? [raw, substitutions[i]] : raw).join('')
+    );
+  } else if (!substitutions.length) {
+    return new Pattern(first === undefined ? '' : first);
+  }
+  throw new Error(`Unexpected arguments: ${JSON.stringify([first, ...substitutions])}`);
+}
+
+export {
+  Pattern,
+  pattern,
+};