How can you initialize an array of objects within a C constructor?

C Array Constructor Initialization

Initializing an array of objects in C can be challenging, particularly when compared to non-array examples. Consider the following non-array initialization:

struct Foo { Foo(int x) { /* ... */  } };

struct Bar {
     Foo foo;

     Bar() : foo(4) {}
};

In this example, the Foo object within the Bar struct is properly initialized using the initializer list in the constructor. However, initializing an array of objects requires a different approach.

struct Foo { Foo(int x) { /* ... */  } };

struct Baz { 
     Foo foo[3];

     Baz() : foo[0](4), foo[1](5), foo[2](6) {}
};

The incorrect syntax shown in the above example highlights the challenge of initializing array elements individually.

Solution

Unfortunately, according to the provided answer, there is no standard way to initialize an array of objects in C within the constructor. Instead, a default constructor must be used for the array members, and any necessary initialization can be performed after construction time.

This limitation is attributed to the constraints of the embedded processor being used, which lacks support for modern C standards. As a workaround, the author suggests creating a default constructor and an explicit init()method to perform initialization after construction. While this approach may not be ideal, it overcomes the lack of constructor initializers for arrays.

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