syntax parcing preinitialized C-struct

we have of C-structure with some AllocBlockParams_t type
Editor have red underscore and inform me about syntax error
replacing form from:

{.x = y}

to:

{ x : y }

has no effect too
GCC done without any errors and warnings

int avmem_alloc_buffer(BufferDescr_t* Buffer_p, unsigned size, unsigned alignment, unsigned partition)
{
int ErrCode;

AllocBlockParams_t AllocBlockParams =

{ .PartitionHandle = partition, .Size = size, .Alignment = alignment, .AllocMode = ALLOC_MODE_BOTTOM_TOP, .NumberOfForbiddenRanges = 0, .ForbiddenRangeArray_p = NULL, .NumberOfForbiddenBorders = 0, .ForbiddenBorderArray_p = NULL, }

;
...
}