Module: Ruby2JS::Filter::RubyJS

Includes:
SEXP
Defined in:
lib/ruby2js/filter/rubyjs.rb

Instance Method Summary collapse

Methods included from SEXP

#S, #s

Instance Method Details

#on_block(node) ⇒ Object 



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# File 'lib/ruby2js/filter/rubyjs.rb', line 60

def on_block(node)
  call, args, *block = node.children
  method = call.children[1]
  return super if excluded?(method)

  if \
    [:collect_concat, :count, :cycle, :delete_if, :drop_while,
    :each_index, :each_slice, :each_with_index, :each_with_object,
    :find, :find_all, :flat_map, :inject, :grep, :group_by, :keep_if,
    :map, :max_by, :min_by, :one?, :partition, :reject, :reverse_each,
    :select!, :sort_by, :take_while].include? method
  then
    if \
      [:collect_concat, :count, :delete_if, :drop_while, :find,
      :find_all, :flat_map, :grep, :group_by, :keep_if, :map, :max_by,
      :min_by, :one?, :partition, :reject, :select!, :sort_by,
      :take_while].include? method
    then
      block = [ s(:autoreturn, *block) ]
    end

    lvar = [:each_index, :keep_if, :select!].include?(method) ? :_a : :_e

    if method == :find and call.children.length == 2
      call = s(:send, *call.children, s(:nil))
    elsif method == :inject and call.children.length == 3
      call = s(:send, *call.children, s(:nil))
    elsif method == :select!
      call = s(:send, call.children.first, :select_bang,
        *call.children[2..-1])
    end

    s(:block, s(:send, s(:lvar, lvar), call.children[1],
      *process_all([call.children[0], *call.children[2..-1]])),
      args, *block)
  else
    super
  end
end

#on_erange(node) ⇒ Object 



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# File 'lib/ruby2js/filter/rubyjs.rb', line 104

def on_erange(node)
  s(:send, s(:attr, s(:const, nil, :R), :Range), :new, *node.children,
    s(:true))
end

#on_irange(node) ⇒ Object 



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# File 'lib/ruby2js/filter/rubyjs.rb', line 100

def on_irange(node)
  s(:send, s(:attr, s(:const, nil, :R), :Range), :new, *node.children)
end

#on_send(node) ⇒ Object 



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# File 'lib/ruby2js/filter/rubyjs.rb', line 8

def on_send(node)
  # leave functional style calls alone
  target = node.children.first
  return super if target and [:_s, :_a, :_h, :_n, :_i, :_t].
    include? target.children[1]

  method = node.children[1]
  return super if excluded?(method)

  # leave classic ("OO") style call chains alone
  while target and target.type == :send
    return super if target.children[1] == :R
    target = target.children.first
  end

  if \
    [:capitalize, :center, :chomp, :ljust, :lstrip, :rindex, :rjust,
      :rstrip, :scan, :swapcase, :tr].include? method
  then
    # map selected string functions
    s(:send, s(:lvar, :_s), method,
      *process_all([node.children[0], *node.children[2..-1]]))

  elsif \
    [:at, :compact, :compact!, :delete_at, :delete_at, :flatten, :insert,
    :reverse, :reverse!, :rotate, :rotate, :rotate!, :shift, :shuffle,
    :shuffle!, :slice, :slice!, :transpose, :union, :uniq, :uniq!]
    .include? method
  then
    # map selected array functions
    s(:send, s(:lvar, :_a), method.to_s.sub("!", '_bang'),
      *process_all([node.children[0], *node.children[2..-1]]))


  elsif [:strftime].include? method
    # map selected time functions
    s(:send, s(:lvar, :_t), method,
      *process_all([node.children[0], *node.children[2..-1]]))

  elsif method == :<=>
    s(:send, s(:attr, s(:const, nil, :R), :Comparable), :cmp,
      node.children[0], *node.children[2..-1])

  elsif method == :between?
    s(:send, s(:send, nil, :R, node.children[0]), :between,
      *node.children[2..-1])

  else
    super
  end
end