# Package org.codehaus.groovy.transform.stc

- Interface Summary
  Interface | Description
  --- | ---
  SignatureCodec | A signature codec is responsible for encoding and decoding of inferred returned types as stored in bytecode.

- Class Summary
  Class | Description
  --- | ---
  AbstractTypeCheckingExtension | Custom type checking extensions may extend this method in order to benefit from a lot of support methods.
  DefaultTypeCheckingExtension | The default type checking handler is used by the standard type checker and doesn't handle any of the type checking errors by default.
  ExtensionMethodNode | Represents method nodes which are used by the static type checker to virtually add methods coming from `DGM-like` methods.
  GroovyTypeCheckingExtensionSupport | Base class for type checking extensions written in Groovy.
  GroovyTypeCheckingExtensionSupport.TypeCheckingDSL |
  Receiver<T> |
  SharedVariableCollector | A visitor which collects the list of variable expressions which are closure shared.
  SignatureCodecVersion1 | First implementation of an inferred type signature codec.
  StaticTypeCheckingSupport | Support methods for `StaticTypeCheckingVisitor`.
  StaticTypeCheckingVisitor | The main class code visitor responsible for static type checking.
  StaticTypeCheckingVisitor.SignatureCodecFactory |
  TraitTypeCheckingExtension | A type checking extension that will take care of handling errors which are specific to traits.
  TypeCheckingContext |
  TypeCheckingContext.EnclosingClosure | Represents the context of an enclosing closure.
  TypeCheckingExtension | This interface defines a high-level API for handling type checking errors.

- Enum Summary
  Enum | Description
  --- | ---
  StaticTypesMarker | This enumeration is used by the AST transformations which rely on static type checking, either to store or to retrieve information from AST node metadata.