libraries/base/Data/OldList.hs¶
Note [Inline @unzipN@ functions]¶
The inline principle for @unzip{4,5,6,7}@ is the same as ‘unzip’/’unzip3’ in “GHC.List”. The ‘unzip’/’unzip3’ functions are inlined so that the foldr with which they are defined has an opportunity to fuse.
As such, since there are not any differences between 2/3-ary ‘unzip’ and its n-ary counterparts below aside from the number of arguments, the INLINE pragma should be replicated in the @unzipN@ functions below as well.
