private object Apply(ParseTreeNode x)
{
object result = null;
object o = Evaluate(x[0]);
if (o is MethodInfo)
{
MethodInfo meth = (MethodInfo)o;
object[] paras = new object[x.Arity - 1];
for (int i = 1; i < x.Arity; i++)
{
paras[i - 1] = x[i];
}
try
{
result = meth.Invoke(this, paras);
}
catch (TargetInvocationException ex1)
{
MethodTracer.LogWarning(ex1.Message);
MethodTracer.LogWarning(ex1.InnerException.Message);
MethodTracer.LogWarning(ex1.InnerException.StackTrace);
}
}
return(result);
}
void BuildComprehension()
{
MethodTracer.Enter();
while (true)
{
MethodTracer.LogMessage("{0}", parser.Token);
if (parser.Token.type != TokenType.Identifier)
{
MethodTracer.LogWarning("First part in comprehension must be an identifier.");
break;
}
Name = "LISTCOMPREHENSION";
this[1] = new Operator()
{
Name = parser.Token.value
};
parser.Advance();
parser.Advance(TokenType.Symbol, ":");
this[2] = parser.Expression(0);
}
MethodTracer.Exit();
}
public void Advance()
{
if (EndOfStreamReached)
{
_token = null;
_op = new Operator()
{
Name = "", lbp = 0, parser = this
};
}
else
{
_token = _tokens.ReadToken();
if (_token.type == TokenType.DoubleQuotedString)
{
_op = new Operator()
{
Name = "STRING"
};
_op[0] = new Operator()
{
Name = _token.value
};
}
else if (_token.type == TokenType.Number)
{
_op = new Operator()
{
Name = "NUMBER"
};
_op[0] = new Operator()
{
Name = _token.value
};
}
else if (_token.type == TokenType.Identifier || _token.type == TokenType.Symbol)
{
if (_top.ContainsKey(_token))
{
_op = _top[_token].Copy();
_op.parser = this;
}
else
{
int lbp = 1;
if (_token.type == TokenType.Symbol)
{
lbp = 0;
}
_op = new Operator()
{
Name = _token.value, lbp = lbp, parser = this
};
}
}
else
{
MethodTracer.LogWarning("Unhandled Token:{0}", _token);
}
}
}
