Class: Opal::Nodes::BaseYieldNode

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

Direct Known Subclasses

ReturnableYieldNode, YasgnNode, YieldNode

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, #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_call(children, level) ⇒ Object 



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# File 'opal/lib/opal/nodes/yield.rb', line 6

def compile_call(children, level)
  yielding_scope = find_yielding_scope

  yielding_scope.uses_block!
  block_name = yielding_scope.block_name || '$yield'

  if yields_single_arg?(children)
    push expr(children.first)
    wrap "$opal.$yield1(#{block_name}, ", ')'
  else
    push expr(s(:arglist, *children))

    if uses_splat?(children)
      wrap "$opal.$yieldX(#{block_name}, ", ')'
    else
      wrap "$opal.$yieldX(#{block_name}, [", '])'
    end
  end
end

#find_yielding_scope ⇒ Object 



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# File 'opal/lib/opal/nodes/yield.rb', line 26

def find_yielding_scope
  working = scope
  while working
    if working.block_name or working.def?
      break
    end
    working = working.parent
  end

  working
end

#uses_splat?(children) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/lib/opal/nodes/yield.rb', line 42

def uses_splat?(children)
  children.any? { |child| child.type == :splat }
end

#yields_single_arg?(children) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/lib/opal/nodes/yield.rb', line 38

def yields_single_arg?(children)
  !uses_splat?(children) and children.size == 1
end