public override void GenerateCode(MethodBodyGenerator generator, MethodCompileOption option)
{
var target = generator.Method.DeclaringType;
IExpressionVisitor <object> visitor = ScriptCompiler.Instance;
//pass scoped arguments // refer System.Linq.Expression.Compiler folder
var names = Parameters.Map(para => para.Name);
// Emit First Argument
var lamdaVisit = new LamdaVisitor(names);
Body.Accept(lamdaVisit);
LamdaGen lamdaGen;
if (generator.Method.DeclaringType is Generators.TypeGenerator typeGen)
{
lamdaGen = typeGen.DefineAnonymousMethod(Types, ReturnType);
}
else
{
lamdaGen = AssemblyGen.DynamicAssembly.DefineAnonymousMethod(Types, ReturnType);
}
var methodGen = new Generators.MethodGenerator(lamdaGen.Method, ParameterInfos, lamdaGen.Type)
{
SyntaxBody = Body,
Context = generator.Context
};
methodGen.EmitParameterInfo();
var bodyGen = new MethodBodyGenerator(methodGen, lamdaGen.Method.GetILGenerator());
var values = lamdaVisit.HoistedLocals.Values;
// new object[] {}
var valVar = generator.DeclareVariable(LamdaGen.ObjectArray);
ArrayListExpression.MakeObjectArray(generator, values);
generator.StoreVariable(valVar);
if (values.Count > 0)
{
int index = 0;
var field = lamdaGen.Values;
foreach (var item in lamdaVisit.HoistedLocals)
{
var value = item.Value;
var variable = bodyGen.DeclareVariable(value.Type, item.Key);
bodyGen.LoadArgument(0);
bodyGen.LoadField(field);
bodyGen.LoadInt32(index);
bodyGen.LoadArrayElement(TypeProvider.ObjectType);
bodyGen.UnboxObject(value.Type);
bodyGen.StoreVariable(variable);
index++;
}
}
bodyGen.Compile();
var type = lamdaGen.CreateType();
generator.LoadVariable(valVar);
if (generator.Method is Generators.DynamicMethodGenerator)
{
generator.NewObject(type.GetConstructor(LamdaGen.CtorSignature));
generator.LoadFunction(type.GetMethod(ReflectionUtils.InvokeMethod, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic), Type);
}
else
{
generator.NewObject(lamdaGen.Constructor);
generator.LoadFunction(lamdaGen.Method, Type);
}
}