Decide how to handle array interfaces

[spencer-lunarg]

certain interface variables have "array interfaces", things like

• all Geometry input variables
• variables marked with PerVertexKHR
• etc

These will look like

layout(location = 0) pervertexEXT in float a[3];
layout(location = 1) pervertexEXT in float b[3];

and then

    1:
      spirv id  : 20
      location  : 0
      type      : float
      array     : [3]
      semantic  : 
      name      : a
      qualifier : 
    2:
      spirv id  : 44
      location  : 1
      type      : float
      array     : [3]
      semantic  : 
      name      : b
      qualifier : 

these "array interface" are what makes this legal, otherwise it would be invalid as a would consume Location [0, 1, 2]

It would be nice to express this, not sure if the best thing is marking these with a qualifier or other mechanism