scala3-compiler-bootstrapped/dotty.tools.backend.jvm/BTypes/PrimitiveBType

PrimitiveBType

sealed trait PrimitiveBType extends BType
trait BType
class Object
trait Matchable
class Any
object BOOL.type
object BYTE.type
object CHAR.type
object DOUBLE.type
object FLOAT.type
object INT.type
object LONG.type
object SHORT.type
object UNIT.type

Value members

Concrete methods

final def maxValueType(other: BType): BType

The upper bound of two primitive types. The other type has to be either a primitive type or Nothing.

The upper bound of two primitive types. The other type has to be either a primitive type or Nothing.

The maxValueType of (Char, Byte) and of (Char, Short) is Int, to encompass the negative values of Byte and Short. See ticket #2087.

Inherited methods

def asArrayBType: ArrayBType
Inherited from:
BType
def asClassBType: ClassBType
Inherited from:
BType
def asRefBType: RefBType
Inherited from:
BType
final def conformsTo(other: BType): Boolean
Inherited from:
BType
final def descriptor: String
Returns:

The Java descriptor of this type. Examples:

  • int: I
  • java.lang.String: Ljava/lang/String;
  • int[]: [I
  • Object m(String s, double d): (Ljava/lang/String;D)Ljava/lang/Object;
Inherited from:
BType
final def isArray: Boolean
Inherited from:
BType
final def isBoxed: Boolean
Inherited from:
BType
final def isClass: Boolean
Inherited from:
BType
final def isIntSizedType: Boolean
Inherited from:
BType
final def isIntegralType: Boolean
Inherited from:
BType
final def isMethod: Boolean
Inherited from:
BType
final def isNonVoidPrimitiveType: Boolean
Inherited from:
BType
final def isNothingType: Boolean
Inherited from:
BType
final def isNullType: Boolean
Inherited from:
BType
final def isNumericType: Boolean
Inherited from:
BType
final def isPrimitive: Boolean
Inherited from:
BType
final def isRealType: Boolean
Inherited from:
BType
final def isRef: Boolean
Inherited from:
BType
final def isWideType: Boolean
Inherited from:
BType
final def maxType(other: BType): BType

Compute the upper bound of two types. Takes promotions of numeric primitives into account.

Compute the upper bound of two types. Takes promotions of numeric primitives into account.

Inherited from:
BType
final def size: Int
Returns:

0 for void, 2 for long and double, 1 otherwise

Inherited from:
BType
def toASMType: Type

The asm.Type corresponding to this BType.

The asm.Type corresponding to this BType.

Note about asm.Type.getObjectType (*): For class types, the method expects the internal name, i.e. without the surrounding 'L' and ';'. For array types on the other hand, the method expects a full descriptor, for example "[Ljava/lang/String;".

See method asm.Type.getType that creates a asm.Type from a type descriptor

  • for an OBJECT type, the 'L' and ';' are not part of the range of the created Type
  • for an ARRAY type, the full descriptor is part of the range
Inherited from:
BType
final override def toString: String

Returns a string representation of the object.

Returns a string representation of the object.

The default representation is platform dependent.

Returns:

a string representation of the object.

Definition Classes
BType -> Any
Inherited from:
BType
final def typedOpcode(opcode: Int): Int

Some JVM opcodes have typed variants. This method returns the correct opcode according to the type.

Some JVM opcodes have typed variants. This method returns the correct opcode according to the type.

Value parameters:
opcode

A JVM instruction opcode. This opcode must be one of ILOAD, ISTORE, IALOAD, IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL, ISHR, IUSHR, IAND, IOR IXOR and IRETURN.

Returns:

The opcode adapted to this java type. For example, if this type is float and opcode is IRETURN, this method returns FRETURN.

Inherited from:
BType