Class: ExpressionEvaluator

Inherits:
Object show all
Defined in:
lib/expression_evaluator_base.rb

Instance Method Summary collapse

Constructor Details

#initialize(linq_exp) ⇒ ExpressionEvaluator

Returns a new instance of ExpressionEvaluator.



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# File 'lib/expression_evaluator_base.rb', line 3

def initialize(linq_exp)
  @linq_exp = linq_exp
end

Instance Method Details

#visit_arg(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 26

def visit_arg(node)
  node.arg.visit(self)
end

#visit_float(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 19

def visit_float(node)
  node.value
end

#visit_integer(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 15

def visit_integer(node)
  node.value
end

#visit_statements(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 41

def visit_statements(node)
  binary_exp = node.elements.first
  binary_exp.visit(self)
end

#visit_string(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 29

def visit_string(node)
  output = ""
  node.each do |e|
    output << e.visit(self)
  end
  output
end

#visit_stringcontent(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 37

def visit_stringcontent(node)
  node.to_s
end

#visit_symbol(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 7

def visit_symbol(node)
  node.value
end

#visit_unary(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 22

def visit_unary(node)
  target = node.operand.visit(self)
  target.send("#{node.operator.to_s}@")
end

#visit_variable(node) ⇒ Object 



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# File 'lib/expression_evaluator_base.rb', line 11

def visit_variable(node)
  @linq_exp.variable_val(node.to_s)
end