different ways to call constructors

[barnack]

Greetings,
may i ask whats the difference between calling

  Class instance(stuff);

and

  Class instance{stuff};

?

[JLBorges]

There is no difference except that implicit narrowing conversions are not allowed within the braces.

int i(5.3) ; // fine; 5.3 narrowed to int

int j{5.3} ; // *** error: implicit narrowing conversion double to int inside {} 

BetweenClass instance( stuff1, Stuff2 ); and Class instance{ stuff1, Stuff2 };
there is another difference: initializer-list constructors are also considered when braces are used.

See:
http://www.stroustrup.com/C++11FAQ.html#uniform-init
http://www.stroustrup.com/C++11FAQ.html#init-list

[barnack]

Ok, thanks a lot! (for the references too)

[Peter87]

there is another difference: initializer-list constructors are also considered when braces are used.

This can sometimes lead to inconsistencies.

std::vector<std::string> vec1 {123}; // vector containing 123 empty strings
std::vector<int> vec2 {123}; // vector containing one int that has value 123 

[barnack]

you suddenly killed my enthusiasm and brought me back to the classic way xD

[mbozzi]

you suddenly killed my enthusiasm and brought me back to the classic way xD

Prefer braces.

https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#es23-prefer-the--initializer-syntax