Class: Opal::Nodes::WhileNode

Inherits:
Base show all
Defined in:
opal/lib/opal/nodes/while.rb

Direct Known Subclasses

UntilNode

Constant Summary

Constants included from Helpers

Helpers::RESERVED

Instance Attribute Summary

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from Base

#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, #reserved?, #variable

Constructor Details

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

Instance Method Details

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/while.rb', line 10

def compile
  with_temp do |redo_var|
    test_code = js_truthy(test)

    compiler.in_while do
      while_loop[:closure] = true if wrap_in_closure?
      while_loop[:redo_var] = redo_var

      body_code = stmt(body)

      if uses_redo?
        push "#{redo_var} = false; #{while_open}#{redo_var} || "
        push test_code
        push while_close
      else
        push while_open, test_code, while_close
      end

      push "#{redo_var} = false;" if uses_redo?
      line body_code, "}"
    end
  end

  wrap '(function() {', '; return nil; })()' if wrap_in_closure?
end

#uses_redo? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/lib/opal/nodes/while.rb', line 44

def uses_redo?
  while_loop[:use_redo]
end

#while_close ⇒ Object 



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# File 'opal/lib/opal/nodes/while.rb', line 40

def while_close
  ") {"
end

#while_open ⇒ Object 



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# File 'opal/lib/opal/nodes/while.rb', line 36

def while_open
  "while ("
end

#wrap_in_closure? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/lib/opal/nodes/while.rb', line 48

def wrap_in_closure?
  expr? or recv?
end