Unnecessary parentheses

Reports unnecessary parentheses within function types. Functions without parameters do not require parentheses.

A quick fix is available to remove the unnecessary parentheses.

Example:

class Example
  # Unnecessary parentheses in function type
  def call: () -> untyped
end

After the quick fix:

class Example
  def call: -> untyped
end

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.

RbsUnnecessaryParentheses

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.

Settings or Preferences | Editor | Inspections | RBS | Code style issues

Inspection ID: RbsUnnecessaryParentheses

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:

//noinspection RbsUnnecessaryParentheses

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

RubyMine 2025.2

Inspection Details
By default bundled with:	Qodana for Ruby 2025.2, RubyMine 2025.2,

Last modified: 18 September 2025