private static void Parse(ILGenerator il, Type type)
{
if (type.GetTypeInfo().IsValueType)
{
//可空类型
if (EmitUtil.IsNullable(type))
{
var realType = EmitUtil.GetNullableArg0(type);
il.Emit(OpCodes.Call, realType.GetTypeInfo().GetMethod("Parse", new[] { typeof(string) }));
// ReSharper disable once AssignNullToNotNullAttribute
il.Emit(OpCodes.Newobj, type.GetTypeInfo().GetConstructor(new[] { realType }));
}
else
{
il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("Parse", new[] { typeof(string) }));
}
}
}
private static LocalBuilder GetRealLocal(ILGenerator il, Type type, Dictionary <Type, LocalBuilder> realValueDict)
{
LocalBuilder localBuilder;
Type realType = type;
//可空类型或者Datetime类型,都需要将参数存储起来
if (EmitUtil.IsNullable(type))
{
realType = EmitUtil.GetNullableArg0(type);
}
if (realValueDict.ContainsKey(realType))
{
localBuilder = realValueDict[realType];
}
else
{
localBuilder = il.DeclareLocal(realType);
realValueDict.Add(realType, localBuilder);
}
return(localBuilder);
}
private static void PropertyToString(ILGenerator il, Type type, Dictionary <Type, LocalBuilder> valueDict)
{
//值类型和可空类型
if (type.GetTypeInfo().IsValueType)
{
//不可空类型,直接创建新的,可空类型就先从字典中取,取不到再新建
var localBuilder = GetLocal(il, type, valueDict);
il.Emit(OpCodes.Stloc_S, localBuilder);
il.Emit(OpCodes.Ldloca_S, localBuilder);
if (type == typeof(DateTime) || type == typeof(DateTime?))
{
//可空datetime类型
if (type == typeof(DateTime?))
{
il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("get_Value", new Type[] { }));
var realLocal = GetRealLocal(il, type, valueDict);
il.Emit(OpCodes.Stloc_S, realLocal);
il.Emit(OpCodes.Ldloca_S, realLocal);
}
il.Emit(OpCodes.Call, CultureInfo);
il.Emit(OpCodes.Call, DatetimeToString);
}
else
{
if (EmitUtil.IsNullable(type))
{
il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("get_Value", new Type[] { }));
var realLocal = GetRealLocal(il, type, valueDict);
il.Emit(OpCodes.Stloc_S, realLocal);
il.Emit(OpCodes.Ldloca_S, realLocal);
}
il.Emit(OpCodes.Call, EmitUtil.GetNullableArg0(type).GetTypeInfo().GetMethod("ToString", new Type[] { }));
}
}
}
