Stack (YABR)

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java.lang.Object
- com.tonic.analysis.absexec.Stack

```
public final class Stack
extends Object
```
The abstract operand stack: a growable array of StackCtx (one logical entry per value; a long/double is a single wide entry).

Constructor Summary

Constructors
Constructor	Description
`Stack(int maxStack)`	Creates an empty stack sized for the method's declared max stack.
`Stack(Stack other)`	Copies another stack for a forked frame.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getSize()`
`StackCtx`	`peek()`	Returns the top entry without removing it.
`StackCtx`	`pop()`	Removes and returns the top entry.
`void`	`push(StackCtx ctx)`	Pushes an entry, growing the backing array if needed.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Stack
```
public Stack(int maxStack)
```
    Creates an empty stack sized for the method's declared max stack.
    
    Parameters:
    
    maxStack - the method's declared operand-stack depth
  - Stack
```
public Stack(Stack other)
```
    Copies another stack for a forked frame.
    
    Parameters:
    
    other - the stack to copy
- Method Detail
  - push
```
public void push(StackCtx ctx)
```
    Pushes an entry, growing the backing array if needed.
    
    Parameters:
    
    ctx - the entry to push
  - pop
```
public StackCtx pop()
```
    Removes and returns the top entry.
    
    Returns:
    
    the popped entry
    
    Throws:
    
    IllegalStateException - if the stack is empty
  - peek
```
public StackCtx peek()
```
    Returns the top entry without removing it.
    
    Returns:
    
    the top stack entry
  - getSize
```
public int getSize()
```
    Returns:
    
    the size