import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?<=^|[\\n;](?:[\\t ]*(?:\\w+ )?)?)export\\s*(?<modifiers>(?:\\s*declare|\\s*abstract|\\s*async)+)?\\s*(?<declaration>class|const +enum|const|enum|function\\*?|interface|let|namespace|type(?! *\\{)|var)\\s+(?<exports>(?:[$_\\p{ID_Start}][$\\u200C\\u200D\\p{ID_Continue}]*(?=[\\s=:;/(\\{])(?!.*?,))|(?:[\\w\\t\\n\\r .,:$'\"=-]+)|(?:[\\{[][\\w\\t\\n\\r .,:$'\"-]+[\\}\\]]))(?:\\s*=\\s*[$_\\p{ID_Start}][$\\u200C\\u200D\\p{ID_Continue}]*)?";
final String string = "export const CJS_SYNTAX_REGEX: RegExp = /pattern/gm;export const IGNORE_PATTERNS: string[] = [];\n"
+ "export declare const RESOLVE_EXTENSIONS: string[]\n"
+ "export enum Snack{}\n"
+ "export const enum Snack {}\n"
+ "export interface User {}\n"
+ "export class House {}\n"
+ "export declare abstract class House extends Building {}\n"
+ "export abstract class House {}\n"
+ "export async function run() {}\n"
+ "export async function* run() {}\n"
+ "export function foo() {}\n"
+ "export function* foo() {}\n"
+ "export const $foo = 42\n"
+ "export const $foo= 42\n"
+ "export namespace Foo {}\n"
+ "export type Foo = 'foo'\n"
+ "export let name1, name2/*, … */; // also var\n"
+ "export const name1 = 1, name2 = 2/*, … */; // also var, let\n"
+ "export function functionName() { /* … */ }\n"
+ "export class ClassName { /* … */ }\n"
+ "export function* generatorFunctionName() { /* … */ }\n"
+ "export const { name1, name2: bar } = o;\n"
+ "export const [ name1, name2 ] = array;\n\n"
+ "declare module 'module-name' {\n"
+ " export declare abstract class Building {}\n"
+ " export declare class House extends Building {}\n"
+ "}\n\n"
+ "\"export const $foo = 42\"\n\n"
+ "export default async function functionName() { /* … */ }\n"
+ "export default function functionName() { /* … */ }\n"
+ "export default function* generatorName() { /* … */ }\n"
+ "export default async function* generatorNameAsync() { /* … */ }\n"
+ "export default class ClassName { /* … */ }\n"
+ "export default abstract class ClassName { /* … */ }\n\n"
+ "export default function () { /* … */ }\n"
+ "export default async function () { /* … */ }\n"
+ "export default function* () { /* … */ }\n"
+ "export default async function* () { /* … */ }\n"
+ "export default class { /* … */ }\n\n"
+ "export default async () => {}\n"
+ "export default async arg => {}\n"
+ "export default () => {}\n"
+ "export default arg => {}\n"
+ "export default (arg) => {}\n\n"
+ "export default foo\n"
+ "export default foo;\n"
+ "export default 1 + 1;\n\n"
+ "// export const CJS_SYNTAX_REGEX\n\n"
+ "/**\n"
+ " * Resolvable file extensions.\n"
+ " *\n"
+ " * @example\n"
+ " * export const CJS_SYNTAX_REGEX\n"
+ " */\n\n"
+ "export type Foo = 'foo'";
final Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CASE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html