Array support for shaders

[Apeirogon]

If I want to apply shader to some rectangle area on a screen, I must send vertices coordinate of that rectangle to shader.

But if I want apply shader to several rectangles on a screen, I must copy-paste shader, i.e. save same shader with different name, several times, because

Uniforms are so named because they do not change from one execution of a shader program to the next within a particular rendering call. Kronos wiki(TM)

So I cant send next vertices coordinate to same shader in time while it process previous.

So, for such reason, I think that have support to arrays in gldefs would be nice.