CODEWITHSUNDEEP
c++initialization
athos
athos

Reputation: 6405

is there a way to initialize members in brace?

I have a class DealSchedule with some members defined, now I have to initialize it with something like:

DealSchedule trf_schedule;
trf_schedule.site_ = site;
trf_schedule.deal_id_ = deal_id;
trf_schedule.payment_date_ = payment_date;
trf_schedule.ccy1_ = ccy1;
trf_schedule.ccy2_ = ccy2;

Is it possible to write nicely as

DealSchedule trf_schedule 
{ 
  site_ = site;
  deal_id_ = deal_id;
  payment_date_ = payment_date;
  ccy1_ = ccy1;
  ccy2_ = ccy2;
};

this would protect changes to the initialization.

I can come out with something like this (need c++14 supporting renaming in lambda capturing):

DealSchedule trf_schedule;
[&_=trf_schedule]()
{
  _.site_ = site;
  _.deal_id_ = deal_id;
  _.payment_date_ = payment_date;
  _.ccy1_ = ccy1;
  _.ccy2_ = ccy2;
}();

Upvotes: 2

Views: 88

Answers (2)

dlasalle
dlasalle

Reputation: 1725

The correct answer is R_Sahu's, but in the event you really want that syntax and are feeling self-destructive...

struct _ : public DealSchedule { _() { 
  site_ = site;
  deal_id_ = deal_id;
  payment_date_ = payment_date;
  ccy1_ = ccy1;
  ccy2_ = ccy2;
}} trf_schedule;

This uses an inline struct for initialization, which you can then slice back to a DealSchedule.

(Don't actually do this)

Upvotes: 2

R Sahu
R Sahu

Reputation: 206577

DealSchedule trf_schedule 
{ 
  site_ = site;
  deal_id_ = deal_id;
  payment_date_ = payment_date;
  ccy1_ = ccy1;
  ccy2_ = ccy2;
};

is not valid C++ syntax to initialize an object. You can initialize the object using

DealSchedule trf_schedule = {site, deal_id, payment_date, ccy1, ccy2};

if

  1. The corresponding members are public (which sounds like is true in your case) and no other explicit or user defined constructors are provided, or
  2. There is a constructor that takes those arguments.

Upvotes: 1

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