public void Compile(ModuleBuilder builder)
{
if (_invokerBuilder == null)
{
_invokerBuilder = new FuncInvokerBuilder <TSource, TTarget>(_expression);
_invokerBuilder.Compile(builder);
}
}
public void Compile(ModuleBuilder builder)
{
if (_invokerBuilder == null)
{
_invokerBuilder = new FuncInvokerBuilder <Type, object>(_creator);
_invokerBuilder.Compile(builder);
}
}
public override void Compile(ModuleBuilder builder)
{
base.Compile(builder);
if (_invokerBuilder == null)
{
_invokerBuilder = new FuncInvokerBuilder <TSource, TMember>(_expression);
_invokerBuilder.Compile(builder);
}
}
public void Compile(ModuleBuilder builder)
{
var invokerBuilder = new FuncInvokerBuilder <TSource, TTarget>(_container.GetMapFunc <TSource, TTarget>());
invokerBuilder.Compile(builder);
var typeBuilder = builder.DefineStaticType();
var methodBuilder = typeBuilder.DefineStaticMethod("Invoke");
methodBuilder.SetParameters(typeof(IEnumerable <TSource>));
methodBuilder.SetReturnType(typeof(IEnumerable <TTarget>));
var il = methodBuilder.GetILGenerator();
var labelReturn = il.DefineLabel();
var labelNull = il.DefineLabel();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Brfalse, labelNull);
var sourceArray = il.DeclareLocal(typeof(TSource[]));
var targetArray = il.DeclareLocal(typeof(TTarget[]));
var index = il.DeclareLocal(typeof(int));
// Convert parameter to array.
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, _toArrayMethod);
il.Emit(OpCodes.Stloc, sourceArray);
// Declare new array of target.
il.Emit(OpCodes.Ldloc, sourceArray);
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Conv_I4);
il.Emit(OpCodes.Newarr, typeof(TTarget));
il.Emit(OpCodes.Stloc, targetArray);
// var i = 0;
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Stloc, index);
var labelEnd = il.DefineLabel();
il.Emit(OpCodes.Br_S, labelEnd);
var labelStart = il.DefineLabel();
il.MarkLabel(labelStart);
// targetArray[i] = convert(sourceArray[i]);
il.Emit(OpCodes.Ldloc, targetArray);
il.Emit(OpCodes.Ldloc, index);
il.Emit(OpCodes.Ldloc, sourceArray);
il.Emit(OpCodes.Ldloc, index);
il.Emit(OpCodes.Ldelem, typeof(TSource));
il.Emit(OpCodes.Call, invokerBuilder.MethodInfo);
il.Emit(OpCodes.Stelem, typeof(TTarget));
// i++
il.Emit(OpCodes.Ldloc, index);
il.Emit(OpCodes.Ldc_I4_1);
il.Emit(OpCodes.Add);
il.Emit(OpCodes.Stloc, index);
il.MarkLabel(labelEnd);
il.Emit(OpCodes.Ldloc, index);
il.Emit(OpCodes.Ldloc, sourceArray);
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Conv_I4);
il.Emit(OpCodes.Blt_S, labelStart);
il.Emit(OpCodes.Ldloc, targetArray);
il.Emit(OpCodes.Castclass, typeof(IEnumerable <TTarget>));
il.Emit(OpCodes.Br_S, labelReturn);
il.MarkLabel(labelNull);
il.Emit(OpCodes.Ldnull);
il.MarkLabel(labelReturn);
il.Emit(OpCodes.Ret);
#if NETSTANDARD
var type = typeBuilder.CreateTypeInfo();
#else
var type = typeBuilder.CreateType();
#endif
_invokeMethod = type.GetMethod("Invoke");
}