anchor.diff:             :inject-implicit-uniform
              :input-variable-glsl
              :input-variables
  +           :input-variable
  +           :implicit-uniform-variable
              :join-glsl-chunks
              :join-glsl-of-compiled
              :line-loop
  
positive.code:    :*draw-modes*
     :*stage-names*
     :*stage-type-names*
     :*supported-draw-modes*
     :*supported-versions*
     :*valid-contents-symbols*
     ;;
  
negative.code:            :define-vari-trait
             :define-vari-trait-implementation
             :define-vari-function
             :define-glsl-template-function
             :define-vari-struct
             :define-vari-type
             :define-vari-macro
  