Function isPattern

packages/effect/src/SchemaAST.ts:3300–3323

(regExp: globalThis.RegExp, annotations?: Schema.Annotations.Filter)

 * @since 4.0.0
 */
export function isPattern(regExp: globalThis.RegExp, annotations?: Schema.Annotations.Filter) {
  const source = regExp.source
  const pattern = new globalThis.RegExp(source, regExp.flags)
  return makeFilter(
    (s: string) => {
      pattern.lastIndex = 0
      return pattern.test(s)
    },
    {
      expected: `a string matching the RegExp ${source}`,
      representation: {
        id: "effect/schema/isPattern",
        payload: { source, flags: regExp.flags }
      },
      toJsonSchema: () => ({ pattern: source }),
      arbitrary: {
        constraint: {
          patterns: [regExp.source]
        }
      },
      ...annotations
    }
  )
}

function modifyOwnPropertyDescriptors<A extends AST>(
  ast: A,