Package gnu.jel

# Class OPbinary

java.lang.Object
gnu.jel.OP
gnu.jel.OPbinary

    public class OPbinary
    extends OP

A tree node, representing binary operation.

- ## Field Summary

  Fields
  Modifier and Type | Field | Description
  --- | --- | ---
  `int` | `code` | code of this operation
  `protected static byte[][]` | `promotions` | binary promotions of base types

  ### Fields inherited from class gnu.jel.OP

  `chi, resID, resType, specialTypes, unwrapType`

- ## Constructor Summary

  Constructors
  Constructor | Description
  --- | ---
  `OPbinary​(java.util.Stack<OP> paramOPs, int opcode)` | Constructs a new binary operation.

- ## Method Summary

  Modifier and Type | Method | Description
  --- | --- | ---
  `void` | `compile​(ClassFile cf)` | Called to generate the code implementing this OP.
  `java.lang.Object` | `eval()` | Called to evaluate this node and all its sub-nodes.

  ### Methods inherited from class gnu.jel.OP

  `isWidening, isWidening, narrow, typeID, typeIDObject, widen`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### code

    public int code
    code of this operation

  - ### promotions

    protected static final byte[][] promotions
    binary promotions of base types

- ## Constructor Details

  - ### OPbinary

    public OPbinary​(java.util.Stack<OP> paramOPs, int opcode) throws CompilationException
    Constructs a new binary operation.

    Codes are following:

         0   --  addition
         1   --  substraction
         2   --  multiplication
         3   --  division
         4   --  remainder
         5   --  bitwise AND
         6   --  bitwise OR
         7   --  bitwise and logical XOR
         8   --  comparizon for equality
         9   --  comparizon for non-equality
         10  --  comparizon for "less" <
         11  --  comparizon for "greater or equal" >=
         12  --  comparizon for "greater" >
         13  --  comparizon for "less or equal" <=
         14  --  bitwise left shift <<
         15  --  bitwise right signed shift >>
         16  --  bitwise right unsigned shift >>>
         17  --  logical conjunction operator (AND)
         18  --  logical disjunction operator (OR)
         19  --  array element access operation
         20  --  reserved (used internally for string concatenation)

    Parameters:
      `paramOPs` - stack holding the operands
      `opcode` - is the operation code
    Throws:
      `CompilationException`

- ## Method Details

  - ### compile

    public void compile​(ClassFile cf)
    Description copied from class: `OP`
    Called to generate the code implementing this OP.
    Specified by:
      `compile` in class `OP`
    Parameters:
      `cf` - class file with a new open method to write the code into.

  - ### eval

    public java.lang.Object eval() throws java.lang.Exception
    Description copied from class: `OP`
    Called to evaluate this node and all its sub-nodes.

    Upon success this node is to be replaced by the constant node holding the returned object.

    Specified by:
      `eval` in class `OP`
    Returns:
      an object to which this node evaluates
    Throws:
      `java.lang.Exception`