regexpp


A regular expression parser for ECMAScript.

💿 Installation

``bash
$ npm install regexpp
`

- require Node.js 8 or newer.

📖 Usage

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

$3

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.

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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.

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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.

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#### new RegExpParser(options?)

- Parameters:
- options? ([RegExpParser.Options]) The options to parse.

#### parser.parseLiteral(source, start?, end?)

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.

#### parser.parsePattern(source, start?, end?, uFlag?)

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.

#### parser.parseFlags(source, start?, end?)

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.

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#### new RegExpValidator(options)

- Parameters:
- options ([RegExpValidator.Options]) The options to validate.

#### validator.validateLiteral(source, start, end)

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.

#### validator.validatePattern(source, start, end, uFlag)

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.

#### validator.validateFlags(source, start, end)

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.

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#### new RegExpVisitor(handlers)

- Parameters:
- handlers ([RegExpVisitor.Handlers]) The callbacks.

#### visitor.visit(ast)

Validate a regular expression literal.

- Parameters:
- ast ([AST.Node]) The AST to visit.

📰 Changelog

- GitHub Releases

🍻 Contributing

Welcome contributing!

Please use GitHub's Issues/PRs.

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- 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.

[AST.Node]: src/ast.ts#L4
[RegExpParser.Options]: src/parser.ts#L539
[RegExpValidator.Options]: src/validator.ts#L127
[RegExpVisitor.Handlers`]: src/visitor.ts#L204