Class: ExecJS::Xtrn::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/execjs/xtrn/engine.rb

Direct Known Subclasses

Node, Wsh

Constant Summary collapse

Error = 
ExecJS::Xtrn::Error
Run =

Abstract class

nil

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.compile(code = '') ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 37

def self.compile(code='')
  new.tap{|ctx| ctx.exec code}
end

.eval(code) ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 33

def self.eval(code)
  new.eval code
end

.exec(code) ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 29

def self.exec(code)
  new.exec code
end

.stats ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 41

def self.stats
  (@stats||{}).dup
end

Instance Method Details

#call(fn, *args) ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 25

def call(fn, *args)
  eval "(#{fn}).apply(this, #{JSON.dump args})"
end

#eval(code) ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 20

def eval(code)
  return if (code=code.to_s.strip).length==0
  exec "return eval(#{JSON.generate([code])[1...-1]})"
end

#exec(code) ⇒ Object

Raises:



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# File 'lib/execjs/xtrn/engine.rb', line 12

def exec(code)
  return if (code=code.to_s.strip).length==0
  result=child.say code
  result={'err'=>'Invalid JS result'} unless Hash===result
  raise Error, result['err'] if result['err']
  result['ok']
end

#stats ⇒ Object 



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# File 'lib/execjs/xtrn/engine.rb', line 45

def stats
  (@stats||{}).dup
end