pprCols :: Int
pprCols = 100 -- could make configurable
--- NB. printDoc prints FastStrings in UTF-8: hPutFS below does no decoding.
--- This is what we usually want, because the IO library has no encoding
--- functionality, and we're assuming UTF-8 source code so we might as well
--- assume UTF-8 output too.
printDoc :: Mode -> Handle -> Doc -> IO ()
printDoc LeftMode hdl doc
= do { printLeftRender hdl doc; hFlush hdl }
where
put (Chr c) next = hPutChar hdl c >> next
put (Str s) next = hPutStr hdl s >> next
- put (PStr s) next = hPutFS hdl s >> next
+ put (PStr s) next = hPutStr hdl (unpackFS s) >> next
+ -- NB. not hPutFS, we want this to go through
+ -- the I/O library's encoding layer. (#3398)
put (LStr s l) next = hPutLitString hdl s l >> next
done = hPutChar hdl '\n'