Initializing array question

[philhar]

I have been studying C++ for some time now and I recently encountered a form of initializing an array that has me scraching my head.

CUSTOMVERTEX vertices[]
{
{ 400.0f, 62.5f, 0.5f, 1.0f, D3DCOLORT_XRGB(0, 0, 255), },
{ 650.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0), },
{150.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0), },
}

If I understand well this declares and initializes a 1 dimensional array of
type CUSTOMVERTEX (which is a struct) and it contains 3 elements.

What throws me off is the last two commas at the end of each element initializer!
I don't understand the syntax (from the point of view of my limited knowledge, of course!).
Thanx for any help understanding!!

[MiiNiPaa]

Trailing commas in baced-init-list are allowed and discarded. Your code is parsed as:

CUSTOMVERTEX vertices[] {
    { 400.0f, 62.5f, 0.5f, 1.0f, D3DCOLORT_XRGB(0, 0, 255) },
    { 650.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0) },
    { 150.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0) }
};

Trailing commas are useful whey you might add new elements to the end: you do not need to manually add commas to previous line. It makes diffs look cleanier and simplifies external code generators.

[philhar]

Got it thank youu.