public Result Process(CoreSqlContext parseRule, string functionName)
{
var method = new DynamicMethod(functionName,
typeof(Result <string>), new[] { typeof(OneCallContext) });
_il = method.GetILGenerator();
void returnBlock()
{
bool isNamed = NameUtil.IsNamed(functionName);
// root:
// combine deps
// child-named:
// not combine
// child-unnamed:
// combine strings
Label defaultExit = _il.DefineLabel();
Label childNamedNotCombine = _il.DefineLabel();
_il.Emit(OpCodes.Ldarg_0); // ctx
_il.Emit(OpCodes.Call, OneCallContext.GetIsChild); // isChild
_il.Emit(isNamed ?
OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0); // isNamed
_il.Emit(OpCodes.And); // if (isChild && isNamed)
_il.Emit(OpCodes.Brtrue_S, childNamedNotCombine); // goto notCombine
_il.MarkLabel(defaultExit);
{
string methodName = isNamed ?
nameof(CoreSqlVisitorHelper.CombineDeps) :
nameof(CoreSqlVisitorHelper.CombineStrings);
MethodInfo combineMethod = typeof(CoreSqlVisitorHelper).GetMethod(methodName);
_il.Emit(OpCodes.Ldarg_0); // ctx
_il.Emit(OpCodes.Call, combineMethod); // result<str>
_il.Emit(OpCodes.Ret); //
}
_il.MarkLabel(childNamedNotCombine);
{
MethodInfo ok = typeof(Result).GetMethods()
.Single(x => x.IsGenericMethod && x.Name == nameof(Result.Ok))
.MakeGenericMethod(typeof(string));
_il.Emit(OpCodes.Ldstr, ""); // [empty]
_il.Emit(OpCodes.Call, ok); // result<empty>
_il.Emit(OpCodes.Ret); //
}
Function = (EmitFunction)method.CreateDelegate(typeof(EmitFunction));
};
if (parseRule == null)
{
returnBlock();
return(Result.Ok());
}
_il.DeclareLocal(typeof(List <object>));
_il.Emit(OpCodes.Ldarg_0); // ctx
_il.Emit(OpCodes.Call, OneCallContext.GetTempStore); // sb
_il.Emit(OpCodes.Stloc_0); // [empty]
return(Visit(parseRule)
.OnSuccess(() => // [must be empty]
{
returnBlock();
}));
}