← All recipes
Moderne licensed

Use ? instead of _ for wildcard types (Scala 3)

Recipe IDorg.openrewrite.scala.recipes.migrate.UseQuestionMarkWildcard
Artifactio.moderne.recipe:recipes-scala

Finds usage of _ as a wildcard type in type parameters (e.g., List[_]). In Scala 3, the wildcard type syntax changed from _ to ?.

Single recipeProprietary

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.scala.recipes.migrate.UseQuestionMarkWildcard

If the recipe isn’t available locally, install it with:

mod config recipes jar install io.moderne.recipe:recipes-scala:0.3.1

Data tables

Structured output this recipe can produce.

  • Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
  • Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
  • Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
  • Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats