Class: Opal::Nodes::BeginNode

Inherits:
ScopeNode show all
Defined in:
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

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

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from ScopeNode

#add_arg, #add_proto_ivar, #add_scope_gvar, #add_scope_ivar, #add_scope_local, #add_scope_temp, #class?, #class_scope?, #def?, #def_in_class?, #find_parent_def, #has_local?, #has_rescue_else?, #has_temp?, #identify!, #in_ensure, #in_ensure?, #in_scope, #in_while?, #initialize, #iter?, #module?, #new_temp, #next_temp, #pop_while, #push_while, #queue_temp, #sclass?, #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_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::ScopeNode

Instance Method Details

#compileObject


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# File 'lib/opal/nodes/definitions.rb', line 32

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
    compile_children(returned_children, @level)
    wrap '(function() {', '})()'
  end
end

#compile_children(children, level) ⇒ Object


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# File 'lib/opal/nodes/definitions.rb', line 59

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

#compile_inline_children(children, level) ⇒ Object


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# File 'lib/opal/nodes/definitions.rb', line 73

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 ', ' unless idx == 0
    push child
  end
end

#returned_childrenObject


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

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 'lib/opal/nodes/definitions.rb', line 67

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