Class: SyntaxTree::ENDBlock

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

Overview

ENDBlock represents the use of the END keyword, which hooks into the lifecycle of the interpreter. Whatever is inside the block will get executed when the program ends.

END {
}

Interestingly, the END keyword doesn’t allow the do and end keywords for the block. Only braces are permitted.

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#pretty_print, #to_json

Constructor Details

#initialize(lbrace:, statements:, location:, comments: []) ⇒ ENDBlock

Returns a new instance of ENDBlock.



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# File 'lib/syntax_tree/node.rb', line 229

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

Instance Attribute Details

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



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# File 'lib/syntax_tree/node.rb', line 227

def comments
  @comments
end

#lbrace ⇒ Object (readonly)

LBrace

the left brace that is seen after the keyword



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# File 'lib/syntax_tree/node.rb', line 221

def lbrace
  @lbrace
end

#statements ⇒ Object (readonly)

Statements

the expressions to be executed



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# File 'lib/syntax_tree/node.rb', line 224

def statements
  @statements
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 236

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

#child_nodes ⇒ Object Also known as: deconstruct 



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# File 'lib/syntax_tree/node.rb', line 240

def child_nodes
  [lbrace, statements]
end

#deconstruct_keys(keys) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 246

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

#format(q) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 255

def format(q)
  q.group do
    q.text("END ")
    q.format(lbrace)
    q.indent do
      q.breakable
      q.format(statements)
    end
    q.breakable
    q.text("}")
  end
end