Packages

case class InlineInfoAttribute(inlineInfo: InlineInfo) extends Attribute with Product with Serializable

This attribute stores the InlineInfo for a ClassBType as an independent classfile attribute. The compiler does so for every class being compiled.

The reason is that a precise InlineInfo can only be obtained if the symbol for a class is available. For example, we need to know if a method is final in Scala's terms, or if it has the @inline annotation. Looking up a class symbol for a given class filename is brittle (name-mangling).

The attribute is also helpful for inlining mixin methods. The mixin phase only adds mixin method symbols to classes that are being compiled. For all other class symbols, there are no mixin members. However, the inliner requires an InlineInfo for inlining mixin members. That problem is solved by reading the InlineInfo from this attribute.

In principle we could encode the InlineInfo into a Java annotation (instead of a classfile attribute). However, an attribute allows us to save many bits. In particular, note that the strings in an InlineInfo are serialized as references to constants in the constant pool, and those strings (method names, method signatures) would exist in there anyway. So the ScalaInlineAttribute remains relatively compact.

Source
InlineInfoAttribute.scala
Linear Supertypes
Serializable, java.io.Serializable, Product, Equals, Attribute, AnyRef, Any
Known Subclasses
InlineInfoAttributePrototype
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Inherited
  1. InlineInfoAttribute
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. Attribute
  7. AnyRef
  8. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new InlineInfoAttribute(inlineInfo: InlineInfo)

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to any2stringadd[InlineInfoAttribute] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (InlineInfoAttribute, B)
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to ArrowAssoc[InlineInfoAttribute] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  8. def ensuring(cond: (InlineInfoAttribute) ⇒ Boolean, msg: ⇒ Any): InlineInfoAttribute
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to Ensuring[InlineInfoAttribute] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (InlineInfoAttribute) ⇒ Boolean): InlineInfoAttribute
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to Ensuring[InlineInfoAttribute] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): InlineInfoAttribute
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to Ensuring[InlineInfoAttribute] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): InlineInfoAttribute
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to Ensuring[InlineInfoAttribute] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to StringFormat[InlineInfoAttribute] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  15. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  16. def getLabels(): Array[Label]
    Attributes
    protected[scala.tools.asm]
    Definition Classes
    Attribute
  17. val inlineInfo: InlineInfo
  18. def isCodeAttribute(): Boolean
    Definition Classes
    Attribute
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. def isUnknown(): Boolean

    Not sure what this method is good for, it is not invoked anywhere in the ASM framework.

    Not sure what this method is good for, it is not invoked anywhere in the ASM framework. However, the example in the ASM manual also overrides it to false for custom attributes, so it might be a good idea.

    Definition Classes
    InlineInfoAttribute → Attribute
  21. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  22. final def notify(): Unit
    Definition Classes
    AnyRef
  23. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  24. def read(cr: ClassReader, off: Int, len: Int, buf: Array[Char], codeOff: Int, labels: Array[Label]): InlineInfoAttribute

    Deserialize the attribute into an InlineInfo.

    Deserialize the attribute into an InlineInfo. The attribute starts at cr.b(off), but we don't need to access that array directly, we can use the read methods provided by the ClassReader.

    buf is a pre-allocated character array that is guaranteed to be long enough to hold any string of the constant pool. So we can use it to invoke cr.readUTF8.

    Definition Classes
    InlineInfoAttribute → Attribute
  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  26. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. def write(cw: ClassWriter, code: Array[Byte], len: Int, maxStack: Int, maxLocals: Int): ByteVector

    Serialize the inlineInfo into a byte array.

    Serialize the inlineInfo into a byte array. Strings are added to the constant pool and serialized as references.

    Definition Classes
    InlineInfoAttribute → Attribute
  30. def →[B](y: B): (InlineInfoAttribute, B)
    Implicit
    This member is added by an implicit conversion from InlineInfoAttribute to ArrowAssoc[InlineInfoAttribute] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from java.io.Serializable

Inherited from Product

Inherited from Equals

Inherited from Attribute

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from InlineInfoAttribute to any2stringadd[InlineInfoAttribute]

Inherited by implicit conversion StringFormat from InlineInfoAttribute to StringFormat[InlineInfoAttribute]

Inherited by implicit conversion Ensuring from InlineInfoAttribute to Ensuring[InlineInfoAttribute]

Inherited by implicit conversion ArrowAssoc from InlineInfoAttribute to ArrowAssoc[InlineInfoAttribute]

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