Redundant character escape
Reports redundant character escape sequences that can be replaced with unescaped characters preserving the meaning. Many escape sequences that are necessary outside of a character class are redundant inside square brackets [] of a character class.
Although unescaped opening curly braces { outside of character classes are allowed in some dialects (JavaScript, Python, and so on), it can cause confusion and make the pattern less portable, because there are dialects that require escaping curly braces as characters. For this reason the inspection does not report escaped opening curly braces.
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.
RegExpRedundantEscape- 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.
The Ignore escaped closing brackets '}' and ']' option specifies whether to report \} and \] outside of a character class when they are allowed to be unescaped by the RegExp dialect.
New in 2017.3
Inspection ID: RegExpRedundantEscape
Inspection options
Here you can find the description of settings available for the Redundant character escape inspection, and the reference of their default values.
- Ignore escaped closing brackets '}' and ']'
Option ID:
ignoreEscapedMetaCharactersDefault value:
Not selected
Suppressing Inspection
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
Inspection Details | |
|---|---|
By default bundled with: | CLion 2025.2, DataGrip 2025.2, DataSpell 2025.2, GoLand 2025.2, IntelliJ IDEA 2025.2, JetBrains Rider 2025.2, PhpStorm 2025.2, PyCharm 2025.2, Qodana for .NET 2025.2, Qodana for Go 2025.2, Qodana for JS 2025.2, Qodana for JVM 2025.2, Qodana for PHP 2025.2, Qodana for Ruby 2025.2, RubyMine 2025.2, WebStorm 2025.2 |