Class: Opal::Nodes::AliasNode

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

Instance Attribute Summary

Attributes inherited from Base

#compiler, #sexp, #type

Attributes included from Closure::NodeSupport

#closure

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_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::Base

Instance Method Details

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/definitions.rb', line 24

def compile
  # We only need to check one type, because parser otherwise denies invalid expressions
  case new_name.type
  when :gvar # This is a gvar alias: alias $a $b
    helper :alias_gvar
    new_name_str = new_name.children.first.to_s[1..-1].inspect
    old_name_str = old_name.children.first.to_s[1..-1].inspect
    push '$alias_gvar(', new_name_str, ', ', old_name_str, ')'
  when :dsym, :sym # This is a method alias: alias a b
    helper :alias
    compiler.record_method_call old_name.children.last if old_name.type == :sym

    push "$alias(#{scope.self}, ", expr(new_name), ', ', expr(old_name), ')'
  else # Nothing else is available, but just in case, drop an error
    error "Opal doesn't know yet how to alias with #{new_name.type}"
  end
end