mat4.opIndex - multiple declarations

Function mat4.opIndex

2d index by row, col

ref float opIndex(
  int y,
  int x
);

float opIndex(
  int y,
  int x
) const;

Function mat4.opIndex

scalar index by rows then (y*4 + x)

ref float opIndex(
  int index
);

float opIndex(
  int index
) const;