BType

trait BType

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

class Object
trait Matchable
class Any
object UNIT
object BOOL
object CHAR
object BYTE
object SHORT
object INT
object FLOAT
object LONG
object DOUBLE
trait RefBType

Value members

Concrete methods

final def conformsTo(other: BType): Boolean
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;
final def isArray: Boolean
final def isBoxed: Boolean
final def isClass: Boolean
final def isMethod: Boolean
final def isNullType: Boolean
final def isPrimitive: Boolean
final def isRealType: Boolean
final def isRef: Boolean
final def isWideType: Boolean
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.

final def size: Int
Returns

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

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
final override def toString: String
Definition Classes
Any
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 Params
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.