Loc, Span, and Area

A Haskell library for calculations on text file positions.

I started using haskell-src-exts recently to parse Haskell files to turn them into LaTeX for The Joy of Haskell. I wasn’t used to this sort of parser that produces an AST that’s mapped back to the source file by line and column numbers, so it took me a while to wrap my head around what to do with its output.

After a while, I settled on some types, invent…