org.codehaus.groovy.classgen.asm

## Class OperandStack

- java.lang.Object
- - org.codehaus.groovy.classgen.asm.OperandStack

    public class OperandStack
    extends java.lang.Object

### Constructor Summary

Constructors
Constructor and Description
`OperandStack(WriterController wc)`

### Method Summary

Methods
`ClassNode` `box()`
`void` `castToBool(int mark, boolean emptyDefault)` ensure last marked parameter on the stack is a primitive boolean if mark==stack size, we assume an empty expression or statement.
`void` `doAsType(ClassNode targetType)`
`void` `doGroovyCast(ClassNode targetType)` do Groovy cast for top level element
`void` `doGroovyCast(Variable v)`
`void` `dup()` duplicate top element
`int` `getStackLength()`
`ClassNode` `getTopOperand()`
`org.objectweb.asm.Label` `jump(int ifIns)`
`void` `jump(int ifIns, org.objectweb.asm.Label label)`
`void` `load(ClassNode type, int idx)`
`void` `loadOrStoreVariable(BytecodeVariable variable, boolean useReferenceDirectly)`
`void` `pop()` remove operand stack top element using bytecode pop
`void` `popDownTo(int elements)`
`void` `push(ClassNode type)` push operand on stack
`void` `pushBool(boolean inclusive)`
`void` `pushConstant(ConstantExpression expression)` load the constant on the operand stack.
`void` `pushDynamicName(Expression name)`
`void` `remove(int amount)` Remove amount elements from the operand stack, without using pop.
`void` `replace(ClassNode type)` replace top level element with new element of given type
`void` `replace(ClassNode type, int n)` replace n top level elements with new element of given type
`void` `storeVar(BytecodeVariable variable)`
`void` `swap()` swap two top level operands
`java.lang.String` `toString()`

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

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

### Constructor Detail

#### OperandStack

    public OperandStack(WriterController wc)

### Method Detail

#### getStackLength

    public int getStackLength()

#### popDownTo

    public void popDownTo(int elements)

#### castToBool

    public void castToBool(int mark,
                  boolean emptyDefault)

ensure last marked parameter on the stack is a primitive boolean if mark==stack size, we assume an empty expression or statement. was used and we will use the value given in emptyDefault as boolean if mark==stack.size()-1 the top element will be cast to boolean using Groovy truth. In other cases we throw a GroovyBugError

#### pop

    public void pop()

remove operand stack top element using bytecode pop

#### jump

    public org.objectweb.asm.Label jump(int ifIns)

#### jump

    public void jump(int ifIns,
            org.objectweb.asm.Label label)

#### dup

    public void dup()

duplicate top element

#### box

    public ClassNode box()

#### remove

    public void remove(int amount)

Remove amount elements from the operand stack, without using pop. For example after a method invocation

#### push

    public void push(ClassNode type)

push operand on stack

#### swap

    public void swap()

swap two top level operands

#### replace

    public void replace(ClassNode type)

replace top level element with new element of given type

#### replace

    public void replace(ClassNode type,
               int n)

replace n top level elements with new element of given type

#### doGroovyCast

    public void doGroovyCast(ClassNode targetType)

do Groovy cast for top level element

#### doGroovyCast

    public void doGroovyCast(Variable v)

#### doAsType

    public void doAsType(ClassNode targetType)

#### pushConstant

    public void pushConstant(ConstantExpression expression)

load the constant on the operand stack.

#### pushDynamicName

    public void pushDynamicName(Expression name)

#### loadOrStoreVariable

    public void loadOrStoreVariable(BytecodeVariable variable,
                           boolean useReferenceDirectly)

#### storeVar

    public void storeVar(BytecodeVariable variable)

#### load

    public void load(ClassNode type,
            int idx)

#### pushBool

    public void pushBool(boolean inclusive)

#### toString

    public java.lang.String toString()

Overrides:
  `toString` in class `java.lang.Object`

#### getTopOperand

    public ClassNode getTopOperand()