Class: Opal::Nodes::CallNode

Inherits:
Base
  • Object
show all
Defined in:
lib/opal/nodes/call.rb

Direct Known Subclasses

AttrAssignNode

Defined Under Namespace

Classes: DependencyResolver

Constant Summary collapse

SPECIALS =
{}
OPERATORS =

Operators that get optimized by compiler

{ :+ => :plus, :- => :minus, :* => :times, :/ => :divide,
:< => :lt, :<= => :le, :> => :gt, :>= => :ge }

Constants included from Helpers

Helpers::BASIC_IDENTIFIER_RULES, Helpers::ES3_RESERVED_WORD_EXCLUSIVE, Helpers::ES51_RESERVED_WORD, Helpers::IMMUTABLE_PROPS

Instance Attribute Summary

Attributes inherited from Base

#compiler, #type

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#add_gvar, #add_ivar, #add_local, #add_temp, #children, children, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #helper, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, #unshift, #while_loop, #with_temp, #wrap

Methods included from Helpers

#current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #lvar_to_js, #mid_to_jsid, #property, #valid_name?, #variable

Constructor Details

This class inherits a constructor from Opal::Nodes::Base

Class Method Details

.add_special(name, options = {}, &handler) ⇒ Object


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# File 'lib/opal/nodes/call.rb', line 19

def self.add_special(name, options = {}, &handler)
  SPECIALS[name] = options
  define_method("handle_#{name}", &handler)
end

Instance Method Details

#attr_assignment?Boolean


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# File 'lib/opal/nodes/call.rb', line 92

def attr_assignment?
  @assignment ||= meth.to_s =~ /^[\da-z]+\=$/i
end

#compileObject


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# File 'lib/opal/nodes/call.rb', line 24

def compile
  # handle some methods specially
  handle_special

  # some special methods need to skip compilation
  return unless compile_default?

  compiler.method_calls << meth.to_sym

  # if trying to access an lvar in irb mode
  return compile_irb_var if using_irb?

  default_compile
end

#compile_assignmentObject


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# File 'lib/opal/nodes/call.rb', line 105

def compile_assignment
  with_temp do |args_tmp|
    with_temp do |recv_tmp|
      args = expr(arglist)
      mid = mid_to_jsid meth.to_s
      push "((#{args_tmp} = [", args, "]), "+
           "#{recv_tmp} = ", recv(recv_sexp), ", ",
           recv_tmp, mid, ".apply(#{recv_tmp}, #{args_tmp}), "+
           "#{args_tmp}[#{args_tmp}.length-1])"
    end
  end
end

#compile_default!Object


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# File 'lib/opal/nodes/call.rb', line 139

def compile_default!
  @compile_default = true
end

#compile_default?Boolean


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# File 'lib/opal/nodes/call.rb', line 143

def compile_default?
  @compile_default
end

#compile_irb_varObject

Used to generate the code to use this sexp as an ivar var reference


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# File 'lib/opal/nodes/call.rb', line 97

def compile_irb_var
  with_temp do |tmp|
    lvar = variable(meth)
    call = s(:call, s(:self), meth.intern, s(:arglist))
    push "((#{tmp} = Opal.irb_vars.#{lvar}) == null ? ", expr(call), " : #{tmp})"
  end
end

#default_compileObject


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# File 'lib/opal/nodes/call.rb', line 39

def default_compile

  mid = mid_to_jsid meth.to_s

  splat = arglist[1..-1].any? { |a| a.first == :splat }

  if Sexp === arglist.last and arglist.last.type == :block_pass
    block = arglist.pop
  elsif iter
    block = iter
  end

  blktmp  = scope.new_temp if block
  tmprecv = scope.new_temp if splat || blktmp

  # must do this after assigning temp variables
  block = expr(block) if block

  recv_code = recv(recv_sexp)
  call_recv = s(:js_tmp, tmprecv || recv_code)

  if blktmp and !splat
    arglist.insert 1, call_recv
  end

  args = expr(arglist)

  if tmprecv
    push "(#{tmprecv} = ", recv_code, ")#{mid}"
  else
    push recv_code, mid
  end

  if blktmp
    unshift "(#{blktmp} = "
    push ", #{blktmp}.$$p = ", block, ", #{blktmp})"
  end

  if splat
    push ".apply(", (tmprecv || recv_code), ", ", args, ")"
  elsif blktmp
    push ".call(", args, ")"
  else
    push "(", args, ")"
  end

  scope.queue_temp blktmp if blktmp
end

#handle_specialObject

Handle "special" method calls, e.g. require(). Subclasses can override this method. If this method returns nil, then the method will continue to be generated by CallNode.


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# File 'lib/opal/nodes/call.rb', line 127

def handle_special
  @compile_default = true

  if SPECIALS.include? meth
    @compile_default = false
    __send__("handle_#{meth}")
  elsif RuntimeHelpers.compatible?(recvr, meth, arglist)
    @compile_default = false
    push(RuntimeHelpers.new(@sexp, @level, @compiler).compile)
  end
end

#recv_sexpObject


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# File 'lib/opal/nodes/call.rb', line 88

def recv_sexp
  recvr || s(:self)
end

#using_irb?Boolean

a variable reference in irb mode in top scope might be a var ref, or it might be a method call


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# File 'lib/opal/nodes/call.rb', line 120

def using_irb?
  @compiler.irb? and scope.top? and arglist == s(:arglist) and recvr.nil? and iter.nil?
end