public static LambdaParser.CompiledExpression CompileExpression(this NReco.Linq.LambdaParser parser, string stringExpression)
{
var expression = parser.Parse(stringExpression);
var compiledExpr = new LambdaParser.CompiledExpression()
{
Parameters = LambdaParser.GetExpressionParameters(expression)
};
var lambdaExpr = Expression.Lambda(expression, compiledExpr.Parameters);
compiledExpr.Lambda = lambdaExpr.Compile();
return(compiledExpr);
}
public static object Evaluate(this LambdaParser.CompiledExpression compiledExpression, Dictionary <string, object> values)
{
var valuesList = new List <object>();
foreach (var paramExpr in compiledExpression.Parameters)
{
valuesList.Add(new LambdaParameterWrapper(values[paramExpr.Name]));
}
var lambdaRes = compiledExpression.Lambda.DynamicInvoke(valuesList.ToArray());
if (lambdaRes is NReco.Linq.LambdaParameterWrapper)
{
return(((NReco.Linq.LambdaParameterWrapper)lambdaRes).Value);
}
return(lambdaRes);
}
