What is the meaning of a double dot within a square bracket in C++

In the file C:\Program Files (x86)\Windows Kits\8.1\Include\um, I found the following code that I do not know how to interpret:

WINOLEAUTAPI SafeArrayAccessData(_In_ SAFEARRAY * psa,
_Outptr_result_buffer_(_Inexpressible_(psa->cbElements * 
product(psa->rgsabound[0..psa->cDims-1]->cElements))) 
void HUGEP** ppvData);

Note the double period within the square bracket. Is that a new operator in C++?