Class: Opal::Nodes::Args::ExtractOptargNode

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

Overview

Compiles extraction of a single inline optional argument def m(a = 1); end ^^^^^

This node doesn't exist in the original AST, InlineArgs rewriter creates it to simplify compilation

Sometimes the argument can't be inlined. In such cases InlineArgs rewriter replaces s(:optarg, :arg_name, ...default value...) to: s(:fakearg) + s(:extract_post_optarg, :arg_name, ...default value...)

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 'lib/opal/nodes/args/extract_optarg.rb', line 25

def compile
  return if default_value.children[1] == :undefined

  push "if (#{name} == null) #{name} = ", expr(default_value)
end