Class: Liquidscript::Compiler::Base::Action

Inherits:
Object
  • Object
show all
Defined in:
lib/liquidscript/compiler/base/action.rb

Overview

Used to construct blocks that are used with Helpers#expect. It’s primarily syntaxic sugar, and DRYness.

Instance Method Summary collapse

Instance Method Details

#end_loop ⇒ Proc

Returns a block that returns false, and takes one argument. This is for Helpers#expect, when you want to shift the token, and you want the loop to end (if applicable).

Returns:

  • (Proc) 


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# File 'lib/liquidscript/compiler/base/action.rb', line 33

def end_loop
  @_end_loop ||= proc { |_| false }
end

#nothing ⇒ Proc

Returns a block that returns true, and takes no arguments. This is for Helpers#expect, when you don’t want the token to be shifted, and you don’t want the loop to end (if applicable).

Returns:

  • (Proc) 


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# File 'lib/liquidscript/compiler/base/action.rb', line 14

def nothing
  @_nothing ||= proc { true }
end

#shift ⇒ Proc

Returns a block that returns the first argument given to it. This is for Helpers#expect, when you want to shift the token, and you don’t want the loop to end (if applicable). Also used internally for Helpers#shift.

Returns:

  • (Proc) 


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# File 'lib/liquidscript/compiler/base/action.rb', line 24

def shift
  @_shift ||= proc { |_| _ }
end