Class: Opal::Nodes::IfNode

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

Instance Attribute Summary

Attributes inherited from Base

#compiler, #type

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_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::Base

Instance Method Details

#compileObject


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# File 'opal/lib/opal/nodes/if.rb', line 12

def compile
  truthy = self.truthy
  falsy = self.falsy

  push 'if (', js_truthy(test), ') {'

  # skip if-body if no truthy sexp
  indent { line stmt(truthy) } if truthy

  if falsy
    if falsy.type == :if
      line '} else ', stmt(falsy)
    else
      line '} else {'
      indent do
        line stmt(falsy)
      end

      line '}'
    end
  else
    push '}'
  end

  wrap '(function() {', '; return nil; })()' if needs_wrapper?
end

#falsyObject


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# File 'opal/lib/opal/nodes/if.rb', line 43

def falsy
  needs_wrapper? ? compiler.returns(false_body || s(:nil)) : false_body
end

#needs_wrapper?Boolean

Returns:

  • (Boolean)

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# File 'opal/lib/opal/nodes/if.rb', line 47

def needs_wrapper?
  expr? || recv?
end

#truthyObject


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# File 'opal/lib/opal/nodes/if.rb', line 39

def truthy
  needs_wrapper? ? compiler.returns(true_body || s(:nil)) : true_body
end