protected virtual object EvaluateExpression(string expression, object[] parameters = null,
bool skipRefinements = false)
{
var refinedExpression = expression;
var classDefinition = string.Empty;
//0. initialize global usings
var usings = new List <string>(UsedLibraries);
//1. run refinements on input expression
if (!skipRefinements)
{
foreach (ICodeRefiner refinement in Refinements)
{
// use the original refinement if the author didnt implement clone correctly
var cloneRefinement = refinement.Clone() as ICodeRefiner ?? refinement;
refinedExpression = (cloneRefinement).RefineEvaluationString(refinedExpression);
if (cloneRefinement is UsingsExtractionRefinement)
{
var usingRefiner = cloneRefinement as UsingsExtractionRefinement;
usings.AddRange(usingRefiner.UsingStatements);
}
}
}
//2. Build a class
classDefinition = BuildClass(refinedExpression, usings);
//3. Compile the class
var assembly = CompileClass(classDefinition);
//4. Run the code
object retVal = null;
if (assembly != null && assembly.CompiledAssembly != null)
{
retVal = ExecutionHelper.RunCode(assembly, parameters, OnRuntimeError);
}
return(retVal);
}