au.com.codeka.carrot

Class Scope

java.lang.Object

au.com.codeka.carrot.Scope

public class Scope
extends java.lang.Object

Scope is a collection of all the bindings that are active. The scope is basically a stack: each time you iterate down a node, you can push new bindings onto the stack and those will be the first one searched for a variable.

Constructor Summary

Constructors

Constructor and Description
Scope(java.util.Map<java.lang.String,java.lang.Object> globalBindings) Create a new Scope, with the given initial set of "global" bindings.

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.Object>	peek()
void	pop() Pop the most recent bindings off the stack.
void	push(java.util.Map<java.lang.String,java.lang.Object> bindings) Push the given bindings onto the stack.
java.lang.Object	resolve(java.lang.String name) Resolve the given named variable from the stack of bindings, most recently-pushed to last.

Methods inherited from class java.lang.Object

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

Constructor Detail

Scope

public Scope(java.util.Map<java.lang.String,java.lang.Object> globalBindings)

Create a new Scope, with the given initial set of "global" bindings.

Parameters:

globalBindings - A set of "global" bindings that you want first on the stack.

Method Detail

push

public void push(java.util.Map<java.lang.String,java.lang.Object> bindings)

Push the given bindings onto the stack.

Parameters:

bindings - The bindings to push.

pop

public void pop()

Pop the most recent bindings off the stack.

peek

public java.util.Map<java.lang.String,java.lang.Object> peek()

Returns:

The current bindings off the top of the stack.

resolve

@Nullable
public java.lang.Object resolve(java.lang.String name)

Resolve the given named variable from the stack of bindings, most recently-pushed to last.

Parameters:

name - The name to resolve.

Returns:

The resolved value, or null if the value doesn't exist in this scope.