CODEWITHSUNDEEP
c++constructor
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Reputation: 12662

C++ Generate standard constructor

I often find myself writing very simple classes instead of C-style structs. They typically look like this:

class A
{
public:
  type mA;
  type mB;
  ...
  A(type mA,type mB,...) : mA(mA),mB(mB),... {}
}

Is that a sensible way of doing things? If yes, I was wondering whether there was any third party plugin out there or any handy short cut to automatically construct the text for the constructor (e.g. take the highlighted or existent member definitions, replace semicolons with commas, move everything on the same line, ...)? Thanks

Upvotes: 6

Views: 190

Answers (3)

Hayri Uğur Koltuk
Hayri Uğur Koltuk

Reputation: 3020

EDIT: previous version was c99, not c++. now it is c++

i think you can use {} initialization instead of writing constructor. or is it in c++0x? c99? i am not sure. but it looks like:

struct A myA = { 3,  5};

Upvotes: 1

tom502
tom502

Reputation: 701

I'd say it was a sensible way of doing it although OO fanatics might comment on the lack of encapsulation you have. I know Visual Studio has code snippets built in which do half the job you are looking for but it depends on your IDE

Upvotes: 0

Kerrek SB
Kerrek SB

Reputation: 477040

Yes, just use plain aggregates:

struct A
{
  type mA;
  type mB;
  ...
};

Usage:

A x = { mA, mB, ... };

An aggregate has no custom constructors, destructor and assignment operator, and it allows for plenty of optimisations. Aggregate initialization with the brace syntax for example usually constructs the members in place without even a copy. Also you get the best possible copy and move constructors and assignment operators defined for you by the compiler.

Upvotes: 11

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