public void TestWithSymbols()
{
var table = new SymbolTable();
var holder = new SymbolHolder(table);
var interpreter = new Interpreter("a=2+2", holder);
interpreter.Interpret();
Assert.True(table.HasSymbol("a"));
Assert.Equal(4, holder.Get("a"));
interpreter = new Interpreter("b=a+a", holder);
interpreter.Interpret();
Assert.True(table.HasSymbol("b"));
Assert.Equal(8, holder.Get("b"));
}
/// <summary>
/// Verifies if there is a symbol and returns it value.
/// </summary>
/// <param name="symbolNode"></param>
/// <returns></returns>
public double VisitVar(SymbolNode symbolNode)
{
return(_symbolHolder.Get(symbolNode.Symbol.Name));
}