Class: Ruff::Standard::CurrentTime::Instance

Inherits:

Object

• Object
• Ruff::Standard::CurrentTime::Instance

Defined in:

lib/ruff/standard/current_time.rb

Instance Attribute Summary

• #eff ⇒ Object readonly

  You can reimplement the handler using this effect instance.

Instance Method Summary

• #get ⇒ Time

  is a smart method to invoke the effect operation.

• #initialize ⇒ Instance constructor

  makes a new instance.

• #with(&th) ⇒ A!{e}

  is a handler to interpret the effect invokation as requesting the current time.

Constructor Details

#initialize ⇒ Instance

makes a new instance.

# File 'lib/ruff/standard/current_time.rb', line 10

def initialize
  @eff = Ruff.instance
  @handler = Ruff.handler.on(@eff) { |k| k[Time.now] }
end

Instance Attribute Details

#eff ⇒ Object (readonly)

You can reimplement the handler using this effect instance.

# File 'lib/ruff/standard/current_time.rb', line 37

def eff
  @eff
end

Instance Method Details

#get ⇒ Time

is a smart method to invoke the effect operation.

Returns:

• (Time) —

  with with , returns Time.now

# File 'lib/ruff/standard/current_time.rb', line 18

def get
  @eff.perform
end

#with(&th) ⇒ A!{e}

is a handler to interpret the effect invokation as requesting the current time. This handler receives the request and returns current time.

Parameters:

• th (Proc<(), A!{CurrentTime.eff, e}>) —

  is a thunk returning A with the possibility to invoke effects, including CurrentTime.eff .

Returns:

• (A!{e}) —

  returns A , without modification by value handler. But it still has the possibility to invoke effects(e).

# File 'lib/ruff/standard/current_time.rb', line 32

def with(&th)
  @handler.run(&th)
end