Module: Tins::Interpreter

Included in:
Object
Defined in:
lib/tins/dslkit.rb

Instance Method Summary collapse

Instance Method Details

#interpret(source, *args) ⇒ Object

Interpret the string source as a body of a block, while passing *args into the block.

A small example explains how the method is supposed to be used and how the *args can be fetched:

class A
  include Tins::Interpreter
  def c
    3
  end
end

A.new.interpret('|a,b| a + b + c', 1, 2) # => 6

To use a specified binding see #interpret_with_binding.



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# File 'lib/tins/dslkit.rb', line 123

def interpret(source, *args)
  interpret_with_binding(source, binding, *args)
end

#interpret_with_binding(source, my_binding, *args) ⇒ Object

Interpret the string source as a body of a block, while passing *args into the block and using my_binding for evaluation.

A small example:

class A
  include Tins::Interpreter
  def c
    3
  end
  def foo
    b = 2
    interpret_with_binding('|a| a + b + c', binding, 1) # => 6
  end
end
A.new.foo # => 6

See also #interpret.



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# File 'lib/tins/dslkit.rb', line 145

def interpret_with_binding(source, my_binding, *args)
  path = '(interpret)'
  if source.respond_to? :to_io
    path = source.path if source.respond_to? :path
    source = source.to_io.read
  end
  block = lambda { |*a| eval("lambda { #{source} }", my_binding, path).call(*a) }
  instance_exec(*args, &block)
end