Class: EnumerableExpessionEvaluator

Inherits:
ExpressionEvaluator show all
Defined in:
lib/providers/enumerable_expression_evaluator.rb

Instance Method Summary collapse

Methods inherited from ExpressionEvaluator

#initialize, #visit_arg, #visit_float, #visit_integer, #visit_statements, #visit_string, #visit_stringcontent, #visit_symbol, #visit_unary, #visit_variable

Constructor Details

This class inherits a constructor from ExpressionEvaluator

Instance Method Details

#visit_argslist(node) ⇒ Object 



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# File 'lib/providers/enumerable_expression_evaluator.rb', line 19

def visit_argslist(node)
  node.map {|arg| arg.visit(self)}
end

#visit_binary(node) ⇒ Object 



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# File 'lib/providers/enumerable_expression_evaluator.rb', line 23

def visit_binary(node)
  right_val = node.right.visit(self)
  left_val = node.left.visit(self)
  if node.operator.to_sym == :and
    left_val && right_val
  elsif node.operator.to_sym == :or
    left_val || right_val
  else
    left_val.send(node.operator.to_ruby.to_sym, right_val)
  end
end

#visit_call(node) ⇒ Object 



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# File 'lib/providers/enumerable_expression_evaluator.rb', line 35

def visit_call(node)
  target = node.target.visit(self)
  method_name = node.identifier ? node.identifier.to_sym : :[]
  if (node.arguments)
    arguments = node.arguments.collect { |x| x.visit(self) }
    target.send(method_name, *arguments)
  else
    target.send(method_name)
  end
end

#visit_groupby(node) ⇒ Object 



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# File 'lib/providers/enumerable_expression_evaluator.rb', line 5

def visit_groupby(node)
  node.expression.visit(self)
end

#visit_hash(node) ⇒ Object 



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# File 'lib/providers/enumerable_expression_evaluator.rb', line 9

def visit_hash(node)
  record = OpenStruct.new
  node.elements.each do |e|
    key = e.key.visit(self)
    value = e.value.visit(self)
    record.send("#{key.to_s}=".to_sym,value)
  end
  record
end