Adding experimental online parser

Author: thenamankumar

resources/build-npm.js

@@ -26,7 +26,7 @@ if (require.main === module) {
 
       const mjs = babelBuild(srcPath, { envName: 'mjs' });
       fs.writeFileSync(destPath.replace(/\.js$/, '.mjs'), mjs);
-    } else if (filepath.endsWith('.d.ts')) {
+    } else if (filepath.endsWith('.d.ts') || filepath.endsWith('.json')) {
       fs.copyFileSync(srcPath, destPath);
     }
   }

src/language/online-parser/index.d.ts

@@ -0,0 +1,2 @@
+export { Parser } from './parser';
+export * from './types';

src/language/online-parser/index.js

@@ -0,0 +1,2 @@
+export { Parser } from './parser';
+export * from './types';

src/language/online-parser/language.d.ts

@@ -0,0 +1,4 @@
+import { LanguageType } from './types';
+
+declare const Language: LanguageType;
+export default Language;

src/language/online-parser/language.js

@@ -0,0 +1 @@
+export { default } from './rules';

src/language/online-parser/parser.d.ts

@@ -0,0 +1,54 @@
+import { Lexer } from '../lexer';
+
+import {
+  Token,
+  Styles,
+  ParserState,
+  ParserConfig,
+  ParserConfigOption,
+  Rule,
+} from './types';
+
+export declare class Parser {
+  state: ParserState;
+  lexer: Lexer;
+  styles: Styles;
+  config: ParserConfig;
+  constructor({
+    state,
+    styles,
+    config,
+    source,
+  }: {
+    state?: ParserState;
+    styles?: Styles;
+    config?: ParserConfigOption;
+    source: string;
+  });
+  static startState(): ParserState;
+  static copyState(state: ParserState): ParserState;
+  sol(): boolean;
+  parseToken(): Token;
+  indentation(): number;
+  private readonly parseTokenConstraint;
+  private readonly parseListOfTypeConstraint;
+  private readonly parseOfTypeConstraint;
+  private readonly parsePeekConstraint;
+  private readonly parseConstraintsSetRule;
+  private readonly matchToken;
+  private readonly butNot;
+  private readonly transformLexerToken;
+  private readonly getNextRule;
+  private readonly popMatchedRule;
+  private readonly rollbackRule;
+  pushRule(
+    rule: Rule,
+    depth: number,
+    name?: string,
+    step?: number,
+    state?: string,
+  ): void;
+  private readonly getRuleKind;
+  private readonly advanceToken;
+  private readonly lookAhead;
+}