tasty-query
API
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tasty-query/tastyquery

tastyquery

package tastyquery

Members list

Packages

package tastyquery.nodejs

Type members

Classlikes

object Annotations

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
object Classpaths

In-memory representation of the contents of classpaths.

In-memory representation of the contents of classpaths.

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Classpaths.type
object Constants

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Constants.type
object Contexts

Container for top-level definitions related to contexts.

Container for top-level definitions related to contexts.

See Contexts.Context for more details.

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Contexts.type
final class Definitions

Attributes

Supertypes
class Object
trait Matchable
class Any
object Exceptions

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Exceptions.type
object Modifiers

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Modifiers.type
object Names

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Names.type
object Signatures

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Supertypes
class Object
trait Matchable
class Any
Self type
Signatures.type
final class SourceFile

Attributes

Companion
object
Supertypes
class Object
trait Matchable
class Any
object SourceFile

Attributes

Companion
class
Supertypes
class Object
trait Matchable
class Any
Self type
SourceFile.type
enum SourceLanguage

Source language of a symbol.

Source language of a symbol.

Attributes

Supertypes
trait Enum
trait Serializable
trait Product
trait Equals
class Object
trait Matchable
class Any
Show all
final class SourcePosition

Attributes

Companion
object
Supertypes
class Object
trait Matchable
class Any
object SourcePosition

Attributes

Companion
class
Supertypes
class Object
trait Matchable
class Any
Self type
object Symbols

Symbols for all kinds of definitions in Scala programs.

Symbols for all kinds of definitions in Scala programs.

Every definition, like classes, defs, types and type parameters, is associated with a Symbol. Symbols are organized in a hierarchy, depending on what kind of definitions they represent.

Symbol
|
+- PackageSymbol                   any package, including the root package, the empty package, and nested packages
|
+- TermOrTypeSymbol                   any term or type symbol, i.e., not a package
   |
   +- TermSymbol                      any term definition:
   |                                  `val`, `var`, `def`, term param, term capture, `object` value
   |
   +- TypeSymbol                      any definition for a type
      +- ClassSymbol                  definition for a `class`, `trait`, or the module class of an `object`
      +- TypeSymbolWithBounds         any other kind of type: `type` definitions, type params, type captures
         +- TypeMemberSymbol          `type` definition, further refined through its `typeDef`
         +- TypeParamSymbol
            +- ClassTypeParamSymbol   type parameter of a class
            +- LocalTypeParamSymbol   any other type parameter

Additionally, PackageSymbol and ClassSymbol extend DeclaringSymbol. Declaring symbols are the ones that contain declarations, which can be looked up with their names.

TypeMemberSymbols exist in 3 flavors, indicated by their typeDef field, of type TypeMemberDefinition:

  • TypeAlias(alias): type alias of the form type T = alias
  • AbstractType(bounds): abstract type member of the form type T >: bounds.low <: bounds.high
  • OpaqueTypeAlias(bounds, alias): opaque type alias of the form type T >: bounds.low <: bounds.high = alias

The main property a TermSymbol is its declaredType, which is a Type. All TypeSymbolWithBounds have bounds of type TypeBounds, which are often used as their primary characteristic. ClassSymbols are entirely defined by themselves.

With the exception of the root package symbol, all symbols have an owner which is another Symbol.

All symbols also have a name. It is a TypeName for TypeSymbols, and a TermName for TermSymbols and PackageSymbols.

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Symbols.type
object Traversers

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Traversers.type
object Trees

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Trees.type
object Types

Types in the Scala type system.

Types in the Scala type system.

Every type from the Scala type system is represented in tasty-query as an instance of Type. That abstract class has a number of subtypes for all the possible "shapes" of types.

For example, a reference to the class scala.Int is represented as

TypeRef(PackageRef("scala"), TypeName("Int"))

Type applications of the form C[T1, ..., Tn] are represented as

AppliedType(typeForC, List(typeForT1, ..., typeForTn))

etc.

The type hierarchy is organized as follows:

TermType                         a type that can be the type of a term tree
|
+- PackageRef                   a reference to a package
|
+- TypeOrMethodic               a type or a methodic type (e.g., the declared type of a term symbol)
    |
    +- MethodicType             the type of a method with at least one parameter list
    |   +- MethodType           `(termParams): resultType`
    |   +- PolyType             `[TypeParams]: resultType`
    |
    +- Type
        |
        +- NamedType            designator type
        |   +- TypeRef          type selection of the form `prefix.T`
        |   +- TermRef          term selection of the form `prefix.t`
        |
        +- AppliedType          `C[T1, ..., Tn]`
        +- ByNameType            type of a by-name parameter `=> T`
        +- ThisType             `C.this`
        +- OrType               `A | B`
        +- AndType              `A & B`
        +- TypeLambda           `[T1, ..., Tn] => R`
        +- TypeParamRef         reference to a type parameter of an enclosing `TypeLambda` or `PolyType`
        +- TermParamRef         reference to a term parameter of an enclosing `MethodType`
        +- AnnotatedType        `T @annotation`
        +- ConstantType         literal singleton type, such as `42` or `"foo"`
        +- MatchType            `T match { case ... }`
        |
        +- RefinedType          refined type
        |   +- TypeRefinement   `P { type T >: L <: H }`
        |   +- TermRefinement   `P { val/def t: T }`
        |
        +- RecType              recursive type that introduces a recursive `this` binding
        +- RecThis              recursive reference to the `this` of a `RecType`
        +- SuperType            `super[mix]` (typically used as `prefix` of `NamedType`s)

In addition, Types contains additional categories of things used inside other types:

Prefix                     prefix of a designator type
+- NoPrefix               the empty prefix, for direct designators
+- NonEmptyPrefix
    +- PackageRef         a reference to a package, for designators of top-level symbols
    +- Type               a type, for named designators

TypeOrWildcard             either a type or a wildcard, used in the type arguments of `AppliedType`
+- Type
+- WildcardTypeArg        `? >: L <: H`

TermSelectionType          the reference type of an `Ident` or `Select`
+- PackageRef
+- TermRef

All of the above types inherit from TypeMappable, which represents things on which we apply type substitution.

Common shapes of types can be constructed with properties of Symbols.Symbol and with combinator methods on Type:

Attributes

Supertypes
class Object
trait Matchable
class Any
Self type
Types.type
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