See the proposal.

We need to decide what will be arrayable, and the syntax to do so. There was consensus on the binding_array<T, N> type. For the various binding types here is the proposed syntax and discussion on arrayability:

• Sampled textures, var a : binding_array<texture_2d<t32>, 2>, arrayable.
• Storage textures, var a : binding_array<texture_storage<r32uint, read_write>, 2>, arrayable.
• Samplers, var a : binding_array<sampler, 2>, arrayable.
• External textures, non-arrayable (we could do it, but difficult for unsized array in the future, and it's overall a hassle)
• Uniform buffers var<uniform> a : binding_array<Uniforms, 2>, arrayable TBD
• Storage buffers var<storage, read_write> a : binding_array<Uniforms, 2>, arrayable TBD
• texel buffers var a : binding_array<texel_buffer<r8uint, read_write>, 2>, arrayable TBD