Class: Sexp2Ruby::Node::Iter

Inherits:
Base
  • Object
show all
Defined in:
lib/sexp2ruby/node/iter.rb

Overview

An Iter, AFAICT, is a Call with a block.

Example:

“‘ # ruby derp(foo) { |bar| herp }

# sexp s(

:iter,
s(:call, nil, :a, s(:call, nil, :b)),
s(:args, :c),
s(:call, nil, :d)

) “‘

Constant Summary

Constants inherited from Base

Base::ASSIGN_NODES, Base::LF, Base::LINE_LENGTH

Instance Attribute Summary

Attributes inherited from Base

#processor

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from Sexp2Ruby::Node::Base

Instance Method Details

#to_s(exp) ⇒ Object 



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# File 'lib/sexp2ruby/node/iter.rb', line 21

def to_s(exp)
  call_sexp = exp.shift

  # Process the `Call`. The Sexp is not consumed here (it is cloned)
  # because we will need to refer to it later, when determining which
  # block delimiters to use (brackets vs. do/end).
  iter = process(call_sexp.deep_clone)

  # The block arguments (as opposed to the `Call` arguments)
  args = exp.shift

  # The body of the block.
  body = exp.empty? ? nil : process(exp.shift)

  args = case args
  when 0 then
    ""
  else
    " |#{process(args)[1..-2]}|"
  end

  b, e = if iter == "END"
    [ "{", "}" ]
  else
    [ "do", "end" ]
  end

  iter.sub!(/\(\)$/, '')

  # REFACTOR: ugh
  result = []
  result << "#{iter} {"
  result << args
  result << (body ? " #{body.strip} " : "")
  result << "}"
  result = result.join

  # Can we squeeze the block onto the same line as the call?
  if same_line_bracket_block?(result, iter, call_sexp.deep_clone)
    return result
  end

  # We will not try to squeeze the block onto one line.
  result = []
  result << "#{iter} #{b}"
  result << args
  result << LF
  if body
    result << indent(body.strip)
    result << LF
  end
  result << e
  result.join
end