Class: Opal::Nodes::BaseYieldNode

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

Direct Known Subclasses

ReturnableYieldNode, YieldNode

Instance Attribute Summary

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from Base

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

Methods included from Helpers

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

Constructor Details

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

Instance Method Details

#compile_callObject


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# File 'opal/lib/opal/nodes/yield.rb', line 8

def compile_call
  yielding_scope = find_yielding_scope

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

  block_name = yielding_scope.block_name

  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_scopeObject


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# File 'opal/lib/opal/nodes/yield.rb', line 30

def find_yielding_scope
  working = scope
  while working
    if working.block_name || 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 46

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 42

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