Class: Opal::Nodes::BeginNode

Inherits:
ScopeNode show all
Defined in:
opal/lib/opal/nodes/definitions.rb

Direct Known Subclasses

KwBeginNode

Constant Summary collapse

COMPLEX_CHILDREN = 
%i[while while_post until until_post js_return].freeze

Instance Attribute Summary

Attributes inherited from ScopeNode

#await_encountered, #block_name, #catch_return, #defs, #gvars, #has_break, #has_retry, #identity, #ivars, #locals, #methods, #mid, #name, #parent, #rescue_else_sexp, #scope_name

Attributes inherited from Base

#compiler, #sexp, #type

Attributes included from Closure::NodeSupport

#closure

Instance Method Summary collapse

Methods inherited from ScopeNode

#accepts_using?, #add_arg, #add_proto_ivar, #add_scope_gvar, #add_scope_ivar, #add_scope_local, #add_scope_temp, #class?, #class_scope?, #collect_refinements_temps, #current_rescue, #def?, #def_in_class?, #defines_lambda, #find_parent_def, #gen_retry_id, #has_local?, #has_rescue_else?, #has_temp?, #identify!, #in_ensure, #in_ensure?, #in_resbody, #in_resbody?, #in_rescue, #in_scope, #in_while?, #initialize, #is_lambda!, #iter?, #lambda?, #lambda_definition?, #module?, #nesting, #new_refinements_temp, #new_temp, #next_temp, #pop_while, #prepare_block, #prepend_scope_temp, #push_while, #queue_temp, #refinements_temp, #relative_access, #sclass?, #scope_locals, #self, #super_chain, #to_vars, #top?, #uses_block!, #uses_block?

Methods inherited from Base

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

Methods included from Closure::NodeSupport

#closure_is?, #compile_catcher, #generate_thrower, #generate_thrower_without_catcher, #in_closure, #pop_closure, #push_closure, #select_closure, #thrower

Methods included from Helpers

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

Constructor Details

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

Instance Method Details

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/definitions.rb', line 46

def compile
  return push 'nil' if children.empty?

  if stmt?
    compile_children(children, @level)
  elsif simple_children?
    compile_inline_children(children, @level)
    wrap '(', ')' if children.size > 1
  elsif children.size == 1
    compile_inline_children(returned_children, @level)
  else
    in_closure do
      compile_children(returned_children, @level)
    end

    if scope.parent&.await_encountered
      wrap '(await (async function() {', '})())'
    else
      wrap '(function() {', '})()'
    end
  end
end

#compile_children(children, level) ⇒ Object 



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# File 'opal/lib/opal/nodes/definitions.rb', line 80

def compile_children(children, level)
  children.each do |child|
    line process(child, level), fragment(';', loc: false)
  end
end

#compile_inline_children(children, level) ⇒ Object 



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# File 'opal/lib/opal/nodes/definitions.rb', line 94

def compile_inline_children(children, level)
  processed_children = children.map do |child|
    process(child, level)
  end

  processed_children.reject(&:empty?).each_with_index do |child, idx|
    push fragment(', ', loc: false) unless idx == 0
    push child
  end
end

#returned_children ⇒ Object 



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# File 'opal/lib/opal/nodes/definitions.rb', line 69

def returned_children
  @returned_children ||= begin
    *rest, last_child = *children
    if last_child
      rest + [compiler.returns(last_child)]
    else
      [s(:nil)]
    end
  end
end

#simple_children? ⇒ Boolean

Returns:

  • (Boolean) 


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

def simple_children?
  children.none? do |child|
    COMPLEX_CHILDREN.include?(child.type)
  end
end