Add prefer-lookaround rule (#324)

* Add prefer-lookaround rule

* Update lib/rules/prefer-lookaround.ts

Co-authored-by: Michael Schmidt <[email protected]>

* fix prefer-lookaround

* Update prefer-lookaround

* Update prefer-lookaround

* Add check to if it consume character

* Improve `prefer-lookaround` (#328)

* fix autofix of end capturing group

Co-authored-by: Michael Schmidt <[email protected]>

Author: ota-meshi

README.md

@@ -167,6 +167,7 @@ The rules with the following star :star: are included in the `plugin:regexp/reco
 | [regexp/no-useless-non-capturing-group](https://ota-meshi.github.io/eslint-plugin-regexp/rules/no-useless-non-capturing-group.html) | disallow unnecessary Non-capturing group | :star::wrench: |
 | [regexp/prefer-character-class](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-character-class.html) | enforce using character class | :star::wrench: |
 | [regexp/prefer-d](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-d.html) | enforce using `\d` | :star::wrench: |
+| [regexp/prefer-lookaround](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-lookaround.html) | prefer lookarounds over capturing group that do not replace | :wrench: |
 | [regexp/prefer-named-backreference](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-named-backreference.html) | enforce using named backreferences | :wrench: |
 | [regexp/prefer-plus-quantifier](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-plus-quantifier.html) | enforce using `+` quantifier | :star::wrench: |
 | [regexp/prefer-question-quantifier](https://ota-meshi.github.io/eslint-plugin-regexp/rules/prefer-question-quantifier.html) | enforce using `?` quantifier | :star::wrench: |

docs/rules/README.md

@@ -76,6 +76,7 @@ The rules with the following star :star: are included in the `plugin:regexp/reco
 | [regexp/no-useless-non-capturing-group](./no-useless-non-capturing-group.md) | disallow unnecessary Non-capturing group | :star::wrench: |
 | [regexp/prefer-character-class](./prefer-character-class.md) | enforce using character class | :star::wrench: |
 | [regexp/prefer-d](./prefer-d.md) | enforce using `\d` | :star::wrench: |
+| [regexp/prefer-lookaround](./prefer-lookaround.md) | prefer lookarounds over capturing group that do not replace | :wrench: |
 | [regexp/prefer-named-backreference](./prefer-named-backreference.md) | enforce using named backreferences | :wrench: |
 | [regexp/prefer-plus-quantifier](./prefer-plus-quantifier.md) | enforce using `+` quantifier | :star::wrench: |
 | [regexp/prefer-question-quantifier](./prefer-question-quantifier.md) | enforce using `?` quantifier | :star::wrench: |

docs/rules/prefer-lookaround.md

@@ -0,0 +1,48 @@
+---
+pageClass: "rule-details"
+sidebarDepth: 0
+title: "regexp/prefer-lookaround"
+description: "prefer lookarounds over capturing group that do not replace"
+---
+# regexp/prefer-lookaround
+
+> prefer lookarounds over capturing group that do not replace
+
+- :exclamation: <badge text="This rule has not been released yet." vertical="middle" type="error"> ***This rule has not been released yet.*** </badge>
+- :wrench: The `--fix` option on the [command line](https://eslint.org/docs/user-guide/command-line-interface#fixing-problems) can automatically fix some of the problems reported by this rule.
+
+## :book: Rule Details
+
+This rule reports string replacement using capturing groups that can be replaced with lookaround assertions.
+
+<eslint-code-block fix>
+
+```js
+/* eslint regexp/prefer-lookaround: "error" */
+
+/* ✓ GOOD */
+var str = 'JavaScript'.replace(/Java(?=Script)/g, 'Type')
+
+/* ✗ BAD */
+var str = 'JavaScript'.replace(/Java(Script)/g, 'Type$1')
+```
+
+</eslint-code-block>
+
+## :wrench: Options
+
+```json
+{
+  "regexp/prefer-lookaround": ["error", {
+      "strictTypes": true
+  }]
+}
+```
+
+- `strictTypes` ... If `true`, strictly check the type of object to determine if the regex instance was used in `replace()` and `replaceAll()`. Default is `true`.  
+  This option is always on when using TypeScript.
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/ota-meshi/eslint-plugin-regexp/blob/master/lib/rules/prefer-lookaround.ts)
+- [Test source](https://github.com/ota-meshi/eslint-plugin-regexp/blob/master/tests/lib/rules/prefer-lookaround.ts)