Class: SyntaxTree::LoopFormatter

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

Overview

Formats an Until, UntilMod, While, or WhileMod node.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(keyword, node, statements) ⇒ LoopFormatter

Returns a new instance of LoopFormatter.



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# File 'lib/syntax_tree.rb', line 12414

def initialize(keyword, node, statements)
  @keyword = keyword
  @node = node
  @statements = statements
end

Instance Attribute Details

#keyword ⇒ Object (readonly)

String

the name of the keyword used for this loop



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# File 'lib/syntax_tree.rb', line 12406

def keyword
  @keyword
end

#node ⇒ Object (readonly)

Until | UntilMod | While | WhileMod

the node that is being formatted



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# File 'lib/syntax_tree.rb', line 12409

def node
  @node
end

#statements ⇒ Object (readonly)

untyped

the statements associated with the node



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# File 'lib/syntax_tree.rb', line 12412

def statements
  @statements
end

Instance Method Details

#format(q) ⇒ Object 



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# File 'lib/syntax_tree.rb', line 12420

def format(q)
  # If the predicate of the loop contains an assignment (in which case we
  # can't know for certain that that assignment doesn't impact the
  # statements inside the loop) then we can't use the modifier form and we
  # must use the block form.
  if [Assign, MAssign, OpAssign].include?(node.predicate.class)
    format_break(q)
    q.break_parent
    return
  end

  q.group do
    q.if_break { format_break(q) }.if_flat do
      Parentheses.flat(q) do
        q.format(statements)
        q.text(" #{keyword} ")
        q.format(node.predicate)
      end
    end
  end
end