rustc_middle::ty

Module fold

Source

Structs§

  • Replaces the escaping bound vars (late bound regions or bound types) in a type.
  • A simple delegate taking 3 mutable functions. The used functions must always return the same result for each bound variable, no matter how frequently they are called.
  • Folds over the substructure of a type, visiting its component types and all regions that occur free within it.

Traits§

  • A delegate used when instantiating bound vars.
  • This trait is implemented for every folding traversal. There is a fold method defined for every type of interest. Each such method has a default that does an “identity” fold.
  • This trait is implemented for every type that can be folded, providing the skeleton of the traversal.
  • This trait is implemented for every infallible folding traversal. There is a fold method defined for every type of interest. Each such method has a default that does an “identity” fold. Implementations of these methods often fall back to a super_fold_with method if the primary argument doesn’t satisfy a particular condition.

Functions§