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regexpp - npm

A regular expression parser for ECMAScript.

• require Node.js 8 or newer.

import {
    AST,
    RegExpParser,
    RegExpValidator,
    RegExpVisitor,
    parseRegExpLiteral,
    validateRegExpLiteral,
    visitRegExpAST
} from "regexpp"

Parse a given regular expression literal then make AST object.

This is equivalent to new RegExpParser(options).parseLiteral(source).

• Parameters:
  • source (string | RegExp) The source code to parse.
  • options? (RegExpParser.Options) The options to parse.
• Return:
  • The AST of the regular expression.

Validate a given regular expression literal.

This is equivalent to new RegExpValidator(options).validateLiteral(source).

• Parameters:
  • source (string) The source code to validate.
  • options? (RegExpValidator.Options) The options to validate.

Visit each node of a given AST.

This is equivalent to new RegExpVisitor(handlers).visit(ast).

• Parameters:
  • ast (AST.Node) The AST to visit.
  • handlers (RegExpVisitor.Handlers) The callbacks.

• Parameters:
  • options? (RegExpParser.Options) The options to parse.

Parse a regular expression literal.

• Parameters:
  • source (string) The source code to parse. E.g. "/abc/g".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
• Return:
  • The AST of the regular expression.

Parse a regular expression pattern.

• Parameters:
  • source (string) The source code to parse. E.g. "abc".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
  • uFlag? (boolean) The flag to enable Unicode mode.
• Return:
  • The AST of the regular expression pattern.

Parse a regular expression flags.

• Parameters:
  • source (string) The source code to parse. E.g. "gim".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
• Return:
  • The AST of the regular expression flags.

• Parameters:
  • options (RegExpValidator.Options) The options to validate.

Validate a regular expression literal.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.

Validate a regular expression pattern.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
  • uFlag? (boolean) The flag to enable Unicode mode.

Validate a regular expression flags.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.

• Parameters:
  • handlers (RegExpVisitor.Handlers) The callbacks.

Validate a regular expression literal.

• Parameters:
  • ast (AST.Node) The AST to visit.

• GitHub Releases

Welcome contributing!

Please use GitHub's Issues/PRs.

• npm test runs tests and measures coverage.
• npm run build compiles TypeScript source code to index.js, index.js.map, and index.d.ts.
• npm run clean removes the temporary files which are created by npm test and npm run build.
• npm run lint runs ESLint.
• npm run update:test updates test fixtures.
• npm run update:ids updates src/unicode/ids.ts.
• npm run watch runs tests with --watch option.

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