private void CreateParametrizedInstance(
FieldBuilder field, TypeHelper fieldType, TypeHelper objectType, EmitHelper emit, object[] parameters)
{
if (!CheckObjectHolderCtor(fieldType, objectType))
return;
if (parameters.Length == 1)
{
object o = parameters[0];
if (o == null)
{
if (objectType.IsValueType == false)
emit
.ldarg_0
.ldnull
.end()
;
if (IsObjectHolder)
{
emit
.newobj (fieldType, objectType)
;
}
emit
.stfld (field)
;
return;
}
else
{
if (objectType.Type == o.GetType())
{
if (objectType.Type == typeof(string))
{
emit
.ldarg_0
.ldstr ((string)o)
.stfld (field)
;
return;
}
if (objectType.IsValueType)
{
emit.ldarg_0.end();
if (emit.LoadWellKnownValue(o) == false)
{
emit
.ldsfld (GetParameterField())
.ldc_i4_0
.ldelem_ref
.end()
;
}
emit.stfld(field);
return;
}
}
}
}
Type[] types = new Type[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
if (parameters[i] != null)
{
Type t = parameters[i].GetType();
types[i] = (t.IsEnum) ? Enum.GetUnderlyingType(t) : t;
}
else
types[i] = typeof(object);
}
ConstructorInfo ci = objectType.GetPublicConstructor(types);
if (ci == null)
{
if (objectType.IsValueType)
return;
throw new TypeBuilderException(
string.Format(types.Length == 0?
Resources.TypeBuilder_PropertyTypeHasNoPublicDefaultCtor:
Resources.TypeBuilder_PropertyTypeHasNoPublicCtor,
Context.CurrentProperty.Name,
Context.Type.FullName,
objectType.FullName));
}
ParameterInfo[] pi = ci.GetParameters();
emit.ldarg_0.end();
for (int i = 0; i < parameters.Length; i++)
{
object o = parameters[i];
Type oType = o.GetType();
if (emit.LoadWellKnownValue(o))
{
if (oType.IsValueType)
{
if (!pi[i].ParameterType.IsValueType)
emit.box(oType);
else if (Type.GetTypeCode(oType) != Type.GetTypeCode(pi[i].ParameterType))
emit.conv(pi[i].ParameterType);
}
}
else
{
emit
.ldsfld (GetParameterField())
.ldc_i4 (i)
.ldelem_ref
.CastFromObject (types[i])
;
if (oType.IsValueType && !pi[i].ParameterType.IsValueType)
emit.box(oType);
}
}
emit
.newobj (ci)
;
if (IsObjectHolder)
{
emit
.newobj (fieldType, objectType)
;
}
emit
.stfld (field)
;
}