scala.tools.nsc.backend.icode.BasicBlocks

# NoBasicBlock

###
Related Doc: package BasicBlocks

#### object NoBasicBlock extends ICodes.BasicBlock

Source
  BasicBlocks.scala

Linear Supertypes
ICodes.BasicBlock, ProgramPoint[ICodes.BasicBlock], AnyRef, Any
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1. NoBasicBlock
2. BasicBlock
3. ProgramPoint
4. AnyRef
5. Any

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### Value Members

1. #### final def !=(arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

     `true` if !(this == that), false otherwise.

   Definition Classes
     AnyRef → Any

2. #### final def ##(): Int

   Equivalent to `x.hashCode` except for boxed numeric types and `null`.

   Equivalent to `x.hashCode` except for boxed numeric types and `null`. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For `null` returns a hashcode where `null.hashCode` throws a `NullPointerException`.

   returns

     a hash value consistent with ==

   Definition Classes
     AnyRef → Any

3. #### final def ==(arg0: Any): Boolean

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   arg0

     the object to compare against this object for equality.

   returns

     `true` if the receiver object is equivalent to the argument; `false` otherwise.

   Definition Classes
     AnyRef → Any

4. #### def apply(n: Int): ICodes.Instruction

   Return the n-th instruction.

   Return the n-th instruction.

   Definition Classes
     BasicBlock

5. #### final def asInstanceOf[T0]: T0

   Cast the receiver object to be of type `T0`.

   Cast the receiver object to be of type `T0`.

   Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression `1.asInstanceOf[String]` will throw a `ClassCastException` at runtime, while the expression `List(1).asInstanceOf[List[String]]` will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

   returns

     the receiver object.

   Definition Classes
     Any
   Exceptions thrown

     `ClassCastException` if the receiver object is not an instance of the erasure of type `T0`.

6. #### def blockContents: String

   Definition Classes
     BasicBlock

7. #### def clear(): Unit

   Definition Classes
     BasicBlock

8. #### def clone(): AnyRef

   Create a copy of the receiver object.

   Create a copy of the receiver object.

   The default implementation of the `clone` method is platform dependent.

   returns

     a copy of the receiver object.

   Attributes
     protected[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... )
   Note

     not specified by SLS as a member of AnyRef

9. #### def close(): Unit

   Close the block

   Close the block

   Definition Classes
     BasicBlock

10. #### def closeWith(instr: ICodes.Instruction, pos: Global.Position): Unit

    Definition Classes
      BasicBlock

11. #### def closeWith(instr: ICodes.Instruction): Unit

    do nothing if block is already closed

    do nothing if block is already closed

    Definition Classes
      BasicBlock

12. #### def closed: Boolean

    Is this block closed?

    Is this block closed?

    Definition Classes
      BasicBlock

13. #### def closed_=(b: Boolean): Unit

    Definition Classes
      BasicBlock

14. #### def code: ICodes.Code

    Definition Classes
      BasicBlock

15. #### def directSuccessors: List[ICodes.BasicBlock]

    Definition Classes
      BasicBlock

16. #### def emit(is: Seq[ICodes.Instruction]): Unit

    Definition Classes
      BasicBlock

17. #### def emit(instr: ICodes.Instruction, pos: Global.Position): Unit

    Emitting does not set touched to true.

    Emitting does not set touched to true. During code generation this is a hotspot and setting the flag for each emit is a waste. Caching should happen only after a block is closed, which sets the DIRTYSUCCS flag.

    Definition Classes
      BasicBlock

18. #### def emit(instr: ICodes.Instruction): Unit

    Add a new instruction at the end of the block, using the same source position as the last emitted instruction

    Add a new instruction at the end of the block, using the same source position as the last emitted instruction

    Definition Classes
      BasicBlock

19. #### def emitOnly(is: ICodes.Instruction*): Unit

    The semantics of this are a little odd but it's designed to work seamlessly with the existing code.

    The semantics of this are a little odd but it's designed to work seamlessly with the existing code. It emits each supplied instruction, then closes the block. The odd part is that if the instruction has pos == NoPosition, it calls the 1-arg emit, but otherwise it calls the 2-arg emit. This way I could retain existing behavior exactly by calling setPos on any instruction using the two arg version which I wanted to include in a call to emitOnly.

    Definition Classes
      BasicBlock

20. #### def enterIgnoreMode(): Unit

    Enter ignore mode: new 'emit'ted instructions will not be added to this basic block.

    Enter ignore mode: new 'emit'ted instructions will not be added to this basic block. It makes the generation of THROW and RETURNs easier.

    Definition Classes
      BasicBlock

21. #### final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (`arg0`) is a reference to the receiver object (`this`).

    Tests whether the argument (`arg0`) is a reference to the receiver object (`this`).

    The `eq` method implements an equivalence relation on non-null instances of `AnyRef`, and has three additional properties:

    - It is consistent: for any non-null instances `x` and `y` of type `AnyRef`, multiple invocations of `x.eq(y)` consistently returns `true` or consistently returns `false`.
    - For any non-null instance `x` of type `AnyRef`, `x.eq(null)` and `null.eq(x)` returns `false`.
    - `null.eq(null)` returns `true`.

    When overriding the `equals` or `hashCode` methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (`o1 eq o2`), they should be equal to each other (`o1 == o2`) and they should hash to the same value (`o1.hashCode == o2.hashCode`).

    returns

      `true` if the argument is a reference to the receiver object; `false` otherwise.

    Definition Classes
      AnyRef

22. #### def equals(other: Any): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to `eq`.

    See also `equals` in scala.Any.

    returns

      `true` if the receiver object is equivalent to the argument; `false` otherwise.

    Definition Classes
      BasicBlock → AnyRef → Any

23. #### def exceptionHandlerStart: Boolean

    Is this block the start block of an exception handler?

    Is this block the start block of an exception handler?

    Definition Classes
      BasicBlock → ProgramPoint

24. #### def exceptionHandlerStart_=(b: Boolean): Unit

    Definition Classes
      BasicBlock

25. #### def exceptionSuccessors: List[ICodes.BasicBlock]

    Definition Classes
      BasicBlock

26. #### def exceptionSuccessorsForBlock(block: ICodes.BasicBlock): List[ICodes.BasicBlock]

    Definition Classes
      BasicBlock

27. #### def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the `finalize` method is invoked, as well as the interaction between `finalize` and non-local returns and exceptions, are all platform dependent.

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
    Note

      not specified by SLS as a member of AnyRef

28. #### def flagsString: String

    Definition Classes
      BasicBlock

29. #### final def foreach[U](f: (ICodes.Instruction) ⇒ U): Unit

    Apply a function to all the instructions of the block.

    Apply a function to all the instructions of the block.

    Definition Classes
      BasicBlock

30. #### def fromList(is: List[ICodes.Instruction]): Unit

    Definition Classes
      BasicBlock

31. #### def fullString: String

    Definition Classes
      BasicBlock

32. #### def getArray: Array[ICodes.Instruction]

    return the underlying array of instructions

    return the underlying array of instructions

    Definition Classes
      BasicBlock

33. #### final def getClass(): Class[_]

    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

      a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
      AnyRef → Any
    Note

      not specified by SLS as a member of AnyRef

34. #### def hasFlag(flag: Int): Boolean

    Does this block have the given flag?

    Does this block have the given flag?

    Definition Classes
      BasicBlock

35. #### def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

      the hash code value for this object.

    Definition Classes
      BasicBlock → AnyRef → Any

36. #### def ignore: Boolean

    When set, the `emit` methods will be ignored.

    When set, the `emit` methods will be ignored.

    Definition Classes
      BasicBlock

37. #### def ignore_=(b: Boolean): Unit

    Definition Classes
      BasicBlock

38. #### def indexOf(inst: ICodes.Instruction): Int

    Return the index of inst.

    Return the index of inst. Uses reference equality. Returns -1 if not found.

    Definition Classes
      BasicBlock

39. #### final def isEmpty: Boolean

    Definition Classes
      BasicBlock

40. #### final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is `T0`.

    Test whether the dynamic type of the receiver object is `T0`.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression `1.isInstanceOf[String]` will return `false`, while the expression `List(1).isInstanceOf[List[String]]` will return `true`. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

      `true` if the receiver object is an instance of erasure of type `T0`; `false` otherwise.

    Definition Classes
      Any

41. #### def iterator: Iterator[ICodes.Instruction]

    Return an iterator over the instructions in this basic block.

    Return an iterator over the instructions in this basic block.

    Definition Classes
      BasicBlock

42. #### def killIf(cond: Boolean): Unit

    if cond is true, closes this block, entersIgnoreMode, and removes the block from its list of blocks.

    if cond is true, closes this block, entersIgnoreMode, and removes the block from its list of blocks. Used to allow a block to be started and then cancelled when it is discovered to be unreachable.

    Definition Classes
      BasicBlock

43. #### def killUnless(cond: Boolean): Unit

    Same as killIf but with the logic of the condition reversed

    Same as killIf but with the logic of the condition reversed

    Definition Classes
      BasicBlock

44. #### val label: Int

    Definition Classes
      BasicBlock

45. #### def lastInstruction: ICodes.Instruction

    Return the last instruction of this basic block.

    Return the last instruction of this basic block.

    Definition Classes
      BasicBlock

46. #### def length: Int

    The number of instructions in this basic block so far.

    The number of instructions in this basic block so far.

    Definition Classes
      BasicBlock

47. #### def loopHeader: Boolean

    Is this block the head of a while?

    Is this block the head of a while?

    Definition Classes
      BasicBlock

48. #### def loopHeader_=(b: Boolean): Unit

    Definition Classes
      BasicBlock

49. #### val method: ICodes.IMethod

    Definition Classes
      BasicBlock

50. #### final def ne(arg0: AnyRef): Boolean

    Equivalent to `!(this eq that)`.

    Equivalent to `!(this eq that)`.

    returns

      `true` if the argument is not a reference to the receiver object; `false` otherwise.

    Definition Classes
      AnyRef

51. #### final def nonEmpty: Boolean

    Definition Classes
      BasicBlock

52. #### final def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
      AnyRef
    Note

      not specified by SLS as a member of AnyRef

53. #### final def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
      AnyRef
    Note

      not specified by SLS as a member of AnyRef

54. #### def open(): Unit

    Definition Classes
      BasicBlock

55. #### def predContents: String

    Definition Classes
      BasicBlock

56. #### def predecessors: List[ICodes.BasicBlock]

    Returns the predecessors of this block.

    Returns the predecessors of this block.

    Definition Classes
      BasicBlock → ProgramPoint

57. #### var preds: List[ICodes.BasicBlock]

    Cached predecessors.

    Cached predecessors.

    Definition Classes
      BasicBlock

58. #### def removeInstructionsAt(positions: Int*): Unit

    Removes instructions found at the given positions.

    Removes instructions found at the given positions.

    Definition Classes
      BasicBlock

59. #### def removeLastInstruction(): Unit

    Remove the last instruction of this basic block.

    Remove the last instruction of this basic block. It is fast for an open block, but slower when the block is closed.

    Definition Classes
      BasicBlock

60. #### def replaceInstruction(oldInstr: ICodes.Instruction, is: List[ICodes.Instruction]): Boolean

    Replaces `oldInstr` with `is`.

    Replaces `oldInstr` with `is`. It does not update the position field in the newly inserted instructions, so it behaves differently than the one-instruction versions of this function.

    Definition Classes
      BasicBlock

61. #### def replaceInstruction(oldInstr: ICodes.Instruction, newInstr: ICodes.Instruction): Boolean

    Replace the given instruction with the new one.

    Replace the given instruction with the new one. Returns `true` if it actually changed something. The replacing instruction is given the nsc.util.Position of the instruction it replaces.

    Definition Classes
      BasicBlock

62. #### def replaceInstruction(pos: Int, instr: ICodes.Instruction): Boolean

    Replace the instruction at the given position.

    Replace the instruction at the given position. Used by labels when they are anchored. The replacing instruction is given the nsc.util.Position of the instruction it replaces.

    Definition Classes
      BasicBlock

63. #### def size: Int

    Definition Classes
      BasicBlock

64. #### def subst(map: Map[ICodes.Instruction, ICodes.Instruction]): Unit

    Replaces all instructions found in the map.

    Replaces all instructions found in the map.

    Definition Classes
      BasicBlock

65. #### def succContents: String

    Definition Classes
      BasicBlock

66. #### def successors: List[ICodes.BasicBlock]

    Definition Classes
      BasicBlock → ProgramPoint

67. #### final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
      AnyRef

68. #### def take(n: Int): Seq[ICodes.Instruction]

    Definition Classes
      BasicBlock

69. #### def toList: List[ICodes.Instruction]

    Definition Classes
      BasicBlock

70. #### def toString(): String

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

      a String representation of the object.

    Definition Classes
      BasicBlock → AnyRef → Any

71. #### def touched: Boolean

    Has this basic block been modified since the last call to 'successors'?

    Has this basic block been modified since the last call to 'successors'?

    Definition Classes
      BasicBlock

72. #### def touched_=(b: Boolean): Unit

    Definition Classes
      BasicBlock

73. #### val varsInScope: Set[ICodes.Local]

    Local variables that are in scope at entry of this basic block.

    Local variables that are in scope at entry of this basic block. Used for debugging information.

    Definition Classes
      BasicBlock

74. #### final def wait(): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

75. #### final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

76. #### final def wait(arg0: Long): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

### Inherited from ICodes.BasicBlock

### Inherited from ProgramPoint[ICodes.BasicBlock]

### Inherited from AnyRef

### Inherited from Any

### Ungrouped