Package org.eolang.opeo.decompilation

Class OperandStack

java.lang.Object

org.eolang.opeo.decompilation.OperandStack

public final class OperandStack
extends Object

Operand stack.

You can read more about it here

It emulates the behaviour of JVM operand stack.

Since:

0.2

Constructor Summary

Constructors

Constructor	Description
OperandStack()	Default constructor.
OperandStack(AstNode... nodes)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	dup()	Duplicate the higher value on the stack.
Optional<AstNode>	first()	Pop one node from the stack or return empty.
AstNode	pop()	Pop one node from the stack.
List<AstNode>	pop(int number)	Pop N nodes from the stack.
String	pretty()	Pretty representation of the stack.
void	push(AstNode node)	Push one more node to the stack.

Methods inherited from class java.lang.Object

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

Constructor Details

OperandStack

public OperandStack()

Default constructor.

OperandStack

public OperandStack(AstNode... nodes)

Constructor.

Parameters:

nodes - Initial stack nodes.

Method Details

first

public Optional<AstNode> first()

Pop one node from the stack or return empty.

Returns:

Optional node.

pop

public AstNode pop()

Pop one node from the stack.

Returns:

Node.

pop

public List<AstNode> pop(int number)

Pop N nodes from the stack.

Parameters:

number - Number of nodes to pop.

Returns:

Collection of nodes.

push

public void push(AstNode node)

Push one more node to the stack.

Parameters:

node - Node to add to the stack.

dup

public void dup()

Duplicate the higher value on the stack.

pretty

public String pretty()

Pretty representation of the stack.

Returns:

Human-readable string that represents the stack state.