Empty branch in alternation
Reports empty branches in a RegExp alternation. An empty branch will only match the empty string, and in most cases that is not what is desired. This inspection will not report a single empty branch at the start or the end of an alternation.
Example:
After the quick-fix is applied:
Locating this inspection
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
RegExpEmptyAlternationBranch- Via Settings dialog
Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.
New in 2017.2
Inspection Details | |
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By default bundled with: | CLion 2025.1, DataGrip 2025.1, DataSpell 2025.1, GoLand 2025.1, IntelliJ IDEA 2024.3, JetBrains Rider 2024.3, PhpStorm 2024.3, PyCharm 2025.1, Qodana for .NET 2024.3, Qodana for Go 2025.1, Qodana for JS 2025.1, Qodana for JVM 2024.3, Qodana for PHP 2024.3, Qodana for Ruby 2025.1, RubyMine 2025.1, WebStorm 2025.1 |
Can be installed with plugin: | IDEA CORE, 251.24734 |