anchor.diff:             :split-arguments
              :v-macroexpand-all
              :v-compiler-macroexpand-all
  -           
  +           :*stage-types*
  +
              ;;compile-result
              :glsl-code
              :stage-type
              :out-vars
              :in-args
              :uniforms
  -           :context))
  +           :context
  +
  +           ;;utils
  +           :lambda-list-split
  +           :pipe->))
  
positive.code:            :find-mutual-cast-type
  
             ;;environment
             :make-varjo-environment
  
             ;;type functions
  
negative.code:            :v-true-type
  
             ;;types
             :add-type-shadow
             :un-shadow
             :v-t-type
             :v-type
             :v-stemcell
  