Class: Opal::Nodes::BackRefNode

Inherits:
GlobalVariableNode show all
Defined in:
opal/lib/opal/nodes/variables.rb

Overview

back_ref can be: $` $' $& $+ (currently unsupported)

Instance Attribute Summary

Attributes inherited from Base

#compiler, #sexp, #type

Instance Method Summary collapse

Methods inherited from GlobalVariableNode

#var_name

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_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 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::Base

Instance Method Details

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/variables.rb', line 121

def compile
  helper :gvars

  case var_name
  when '&'
    handle_global_match
  when "'"
    handle_post_match
  when '`'
    handle_pre_match
  when '+'
    super
  else
    raise NotImplementedError
  end
end

#handle_global_match ⇒ Object 



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# File 'opal/lib/opal/nodes/variables.rb', line 138

def handle_global_match
  with_temp do |tmp|
    push "((#{tmp} = $gvars['~']) === nil ? nil : #{tmp}['$[]'](0))"
  end
end

#handle_post_match ⇒ Object 



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# File 'opal/lib/opal/nodes/variables.rb', line 150

def handle_post_match
  with_temp do |tmp|
    push "((#{tmp} = $gvars['~']) === nil ? nil : #{tmp}.$post_match())"
  end
end

#handle_pre_match ⇒ Object 



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# File 'opal/lib/opal/nodes/variables.rb', line 144

def handle_pre_match
  with_temp do |tmp|
    push "((#{tmp} = $gvars['~']) === nil ? nil : #{tmp}.$pre_match())"
  end
end