Class: FExpr::Evaluator

Inherits:

Object

• Object
• FExpr::Evaluator

Defined in:

lib/fexpr/base.rb

Defined Under Namespace

Classes: Node, NumNode, OpNode

Instance Method Summary

• #eval ⇒ Object

  Void -> String.

• #initialize(argv) ⇒ Evaluator constructor

  A new instance of Evaluator.

Constructor Details

#initialize(argv) ⇒ Evaluator

Returns a new instance of Evaluator.

# File 'lib/fexpr/base.rb', line 5

def initialize(argv)
  @argv = argv
  @node_stack = []
  @opt_trace = false
end

Instance Method Details

#eval ⇒ Object

Void -> String

# File 'lib/fexpr/base.rb', line 12

def eval
  @toks = Array.new @argv
  @tok  = nil
  next_token
  expr
  evaluate.to_s
end