Class: RVM::Interpreter::FunctionDefinition

Inherits:
Object
  • Object
show all
Defined in:
lib/rvm/interpreter.rb

Overview

This is a function definition used to write in the function libary

Instance Method Summary collapse

Constructor Details

#initialize(name, body, override = true, pos = nil) ⇒ FunctionDefinition

Initializes a new function definition

name

is the name of the function to define, if it is not unique it will overwrite earlyer definitions (unless override is false)

body

is the body of the cuntion. this will be executed when the defined function is called.

override

when true (default) earlyer definitions are replaced when it is called a second time. When false a exception is thrown



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# File 'lib/rvm/interpreter.rb', line 256

def initialize name, body, override = true, pos = nil
  @name = name
  @body = body
  @override = override
  @pos = pos
end

Instance Method Details

#execute(env) ⇒ Object 



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# File 'lib/rvm/interpreter.rb', line 263

def execute env
  if (not @override) and env.function(@name)
    raise "Function #{@name} already defined at #{@pos}!"
  end
  env.def_function(@name.execute(env),@body)
  nil
end