protected override EvaluationResult EvaluateSimpleExpression(string expression, Func<string, IList<object>, object> methodInvocationCallback) {
var ast = new Parser(expression).Parse();
foreach (var error in ast.GetErrors()) {
Trace.WriteLine(string.Format("Error during parsing of '{0}': {1}", expression, error.Message));
}
if (ast.GetErrors().Any()) {
return new EvaluationResult(new Error { Message = ast.GetErrors().First().Message });
}
var result = new Interpreter().Evalutate(new EvaluationContext {
Tree = ast,
MethodInvocationCallback = methodInvocationCallback
});
Trace.WriteLine(string.Format("Result of evaluation of '{0}': {1}", expression, result));
return result;
}
