Environment class final

An environment containing variables.

An environment can belong to another enclosing environment, which will be considered when looking for a variable.

Constructors

Environment.new({Environment? enclosing})

Creates an environment.

Properties

enclosing → Environment?

The enclosing environment.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

ancestor(int distance) → Environment

Gets the nᵗʰ ancestor environment, according to distance.

assign(Token name, Object? value) → void

Sets the value for name in the environment.

assignAt(int distance, Token name, Object? value) → void

Sets name to value in the nᵗʰ ancestor, according to distance.

define(String name, Object? value) → void

Defines a name in the environment with the passed value.

get(Token name) → Object?

Get a variable with the given name in the environment.

getAt(int distance, String name) → Object?

Gets name in the nᵗʰ ancestor, according to distance.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited