scala3-compiler-bootstrapped/dotty.tools/dotty.tools.backend/dotty.tools.backend.jvm/BTypesFromSymbols

BTypesFromSymbols

dotty.tools.backend.jvm.BTypesFromSymbols

class BTypesFromSymbols[I <: DottyBackendInterface](val int: I, val frontendAccess: PostProcessorFrontendAccess) extends BTypes

This class mainly contains the method classBTypeFromSymbol, which extracts the necessary information from a symbol and its type to create the corresponding ClassBType. It requires access to the compiler (global parameter).

Attributes

Graph
Supertypes: class BTypes

class Object

trait Matchable

class Any

Members list

Type members

Inherited classlikes

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

trait RefBType

trait BType

class Object

trait Matchable

class Any
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Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
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A BType is either a primitve type, a ClassBType, an ArrayBType of one of these, or a MethodType referring to BTypes.

Attributes

Inherited from:: BTypes
Supertypes: class Object

trait Matchable

class Any
Known subtypes: class MethodBType

trait PrimitiveBType

object BOOL

object BYTE

object CHAR

object DOUBLE

object FLOAT

object INT

object LONG

object SHORT

object UNIT

trait RefBType

class ArrayBType

class ClassBType
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Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

A ClassBType represents a class or interface type. The necessary information to build a ClassBType is extracted from compiler symbols and types, see BTypesFromSymbols.

The offset and length fields are used to represent the internal name of the class. They are indices into some character array. The internal name can be obtained through the method internalNameString, which is abstract in this component. Name creation is assumed to be hash-consed, so if two ClassBTypes have the same internal name, they NEED to have the same offset and length.

The actual implementation in subclass BTypesFromSymbols uses the global chrs array from the name table. This representation is efficient because the JVM class name is obtained through classSymbol.javaBinaryName. This already adds the necessary string to the chrs array, so it makes sense to reuse the same name table in the backend.

ClassBType is not a case class because we want a custom equals method, and because the extractor extracts the internalName, which is what you typically need.

Attributes

Inherited from:: BTypes
Supertypes: trait RefBType

trait BType

class Object

trait Matchable

class Any

Attributes

Inherited from:: BTypes
Supertypes: class Object

trait Matchable

class Any

The type info for a class. Used for symboltable-independent subtype checks in the backend.

Value parameters

flags: The java flags, obtained through javaFlags. Used also to derive the flags for InnerClass entries.
interfaces: All transitively implemented interfaces, except for those inherited through the superclass.
memberClasses: Classes nested in this class. Those need to be added to the InnerClass table, see the InnerClass spec summary above.
nestedInfo: If this describes a nested class, information for the InnerClass table.
superClass: The super class, not defined for class java/lang/Object.

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

This class holds the data for an entry in the InnerClass table. See the InnerClass summary above in this file.

There's some overlap with the class NestedInfo, but it's not exactly the same and cleaner to keep separate.

Value parameters

flags: The flags for this class in the InnerClass entry.
innerName: The simple name of the inner class, may be null.
name: The internal name of the class.
outerName: The internal name of the outer class, may be null.

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

trait BType

class Object

trait Matchable

class Any
Show all

Just a named pair, used in CoreBTypes.asmBoxTo/asmUnboxTo.

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

class Object

trait Matchable

class Any
Show all

Information required to add a class to an InnerClass table. The spec summary above explains what information is required for the InnerClass entry.

Value parameters

enclosingClass: The enclosing class, if it is also nested. When adding a class to the InnerClass table, enclosing nested classes are also added.
innerName: The innerName field, may be None.
isStaticNestedClass: True if this is a static nested class (not inner class) () () Note that the STATIC flag in ClassInfo.flags, obtained through javaFlags(classSym), is not correct for the InnerClass entry, see javaFlags. The static flag in the InnerClass describes a source-level propety: if the class is in a static context (does not have an outer pointer). This is checked when building the NestedInfo.
outerName: The outerName field in the InnerClass entry, may be None.

Attributes

Inherited from:: BTypes
Supertypes: trait Serializable

trait Product

trait Equals

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait BType

class Object

trait Matchable

class Any
Known subtypes: object BOOL

object BYTE

object CHAR

object DOUBLE

object FLOAT

object INT

object LONG

object SHORT

object UNIT
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait BType

class Object

trait Matchable

class Any
Known subtypes: class ArrayBType

class ClassBType

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Attributes

Inherited from:: BTypes
Supertypes: trait Singleton

trait Product

trait Mirror

trait Serializable

trait Product

trait Equals

trait PrimitiveBType

trait BType

class Object

trait Matchable

class Any
Show all

Value members

Concrete methods

The ClassBType for a class symbol sym.

Attributes

Return the Java modifiers for the given symbol. Java modifiers for classes:

public, abstract, final, strictfp (not used) for interfaces:
the same as for classes, without 'final' for fields:
public, private (*)
static, final for methods:
the same as for fields, plus:
abstract, synchronized (not used), strictfp (not used), native (not used) for all:
deprecated

(*) protected cannot be used, since inner classes 'see' protected members, and they would fail verification after lifted.

Attributes

Inherited methods

Obtain a previously constructed ClassBType for a given internal name.

Attributes

Inherited from:: BTypes

Concrete fields

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