Class: SyntaxTree::Lambda

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

Overview

Lambda represents using a lambda literal (not the lambda method call).

->(value) { value * 2 }

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#pretty_print, #to_json

Constructor Details

#initialize(params:, statements:, location:, comments: []) ⇒ Lambda

Returns a new instance of Lambda.



5805
5806
5807
5808
5809
5810
 
# File 'lib/syntax_tree/node.rb', line 5805

def initialize(params:, statements:, location:, comments: [])
  @params = params
  @statements = statements
  @location = location
  @comments = comments
end

Instance Attribute Details

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



5803
5804
5805
 
# File 'lib/syntax_tree/node.rb', line 5803

def comments
  @comments
end

#params ⇒ Object (readonly)

Params | Paren

the parameter declaration for this lambda



5797
5798
5799
 
# File 'lib/syntax_tree/node.rb', line 5797

def params
  @params
end

#statements ⇒ Object (readonly)

BodyStmt | Statements

the expressions to be executed in this lambda



5800
5801
5802
 
# File 'lib/syntax_tree/node.rb', line 5800

def statements
  @statements
end

Instance Method Details

#accept(visitor) ⇒ Object 



5812
5813
5814
 
# File 'lib/syntax_tree/node.rb', line 5812

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

#child_nodes ⇒ Object Also known as: deconstruct 



5816
5817
5818
 
# File 'lib/syntax_tree/node.rb', line 5816

def child_nodes
  [params, statements]
end

#deconstruct_keys(keys) ⇒ Object 



5822
5823
5824
5825
5826
5827
5828
5829
 
# File 'lib/syntax_tree/node.rb', line 5822

def deconstruct_keys(keys)
  {
    params: params,
    statements: statements,
    location: location,
    comments: comments
  }
end

#format(q) ⇒ Object 



5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
 
# File 'lib/syntax_tree/node.rb', line 5831

def format(q)
  q.group(0, "->") do
    if params.is_a?(Paren)
      q.format(params) unless params.contents.empty?
    elsif !params.empty?
      q.group do
        q.text("(")
        q.format(params)
        q.text(")")
      end
    end

    q.text(" ")
    q.if_break do
      force_parens =
        q.parents.any? do |node|
          node.is_a?(Command) || node.is_a?(CommandCall)
        end

      q.text(force_parens ? "{" : "do")
      q.indent do
        q.breakable
        q.format(statements)
      end

      q.breakable
      q.text(force_parens ? "}" : "end")
    end.if_flat do
      q.text("{ ")
      q.format(statements)
      q.text(" }")
    end
  end
end