Class: SyntaxTree::ClassDeclaration

Inherits:
Node
  • Object
show all
Defined in:
lib/syntax_tree/node.rb

Overview

Class represents defining a class using the class keyword.

class Container
end

Classes can have path names as their class name in case it’s being nested under a namespace, as in:

class Namespace::Container
end

Classes can also be defined as a top-level path, in the case that it’s already in a namespace but you want to define it at the top-level instead, as in:

module OtherNamespace
  class ::Namespace::Container
  end
end

All of these declarations can also have an optional superclass reference, as in:

class Child < Parent
end

That superclass can actually be any Ruby expression, it doesn’t necessarily need to be a constant, as in:

class Child < method
end

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#construct_keys, #pretty_print, #to_json

Constructor Details

#initialize(constant:, superclass:, bodystmt:, location:, comments: []) ⇒ ClassDeclaration

Returns a new instance of ClassDeclaration.



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# File 'lib/syntax_tree/node.rb', line 2834

def initialize(constant:, superclass:, bodystmt:, location:, comments: [])
  @constant = constant
  @superclass = superclass
  @bodystmt = bodystmt
  @location = location
  @comments = comments
end

Instance Attribute Details

#bodystmt ⇒ Object (readonly)

BodyStmt

the expressions to execute within the context of the class



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# File 'lib/syntax_tree/node.rb', line 2829

def bodystmt
  @bodystmt
end

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



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# File 'lib/syntax_tree/node.rb', line 2832

def comments
  @comments
end

#constant ⇒ Object (readonly)

ConstPathRef | ConstRef | TopConstRef

the name of the class being

defined



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# File 'lib/syntax_tree/node.rb', line 2823

def constant
  @constant
end

#superclass ⇒ Object (readonly)

nil | untyped

the optional superclass declaration



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# File 'lib/syntax_tree/node.rb', line 2826

def superclass
  @superclass
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2842

def accept(visitor)
  visitor.visit_class(self)
end

#child_nodes ⇒ Object Also known as: deconstruct 



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# File 'lib/syntax_tree/node.rb', line 2846

def child_nodes
  [constant, superclass, bodystmt]
end

#deconstruct_keys(_keys) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2852

def deconstruct_keys(_keys)
  {
    constant: constant,
    superclass: superclass,
    bodystmt: bodystmt,
    location: location,
    comments: comments
  }
end

#format(q) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2862

def format(q)
  declaration = -> do
    q.group do
      q.text("class ")
      q.format(constant)

      if superclass
        q.text(" < ")
        q.format(superclass)
      end
    end
  end

  if bodystmt.empty?
    q.group do
      declaration.call
      q.breakable(force: true)
      q.text("end")
    end
  else
    q.group do
      declaration.call

      q.indent do
        q.breakable(force: true)
        q.format(bodystmt)
      end

      q.breakable(force: true)
      q.text("end")
    end
  end
end