Up until C++11, yeah, no reason to use explicit on a multi-arg constructor. That changes in C++11, because of initializer lists. Basically, copy-initialization (but not direct initialization) with an initializer list requires that the constructor not be marked explicit. Example: struct Foo { Foo(int, int); }; struct Bar { explicit Bar(int, int); }; Foo f1(1, … Read more
This is an error message you see whenever you have a situation like the following: char* pointer_to_nonconst = “string literal”; Why? Well, C and C++ differ in the type of the string literal. In C the type is array of char and in C++ it is constant array of char. In any case, you are … Read more
The compiler is allowed to make one implicit conversion to resolve the parameters to a function. What this means is that the compiler can use constructors callable with a single parameter to convert from one type to another in order to get the right type for a parameter. Here’s an example class with a constructor … Read more