shithub: mc

ref: 3de36cf522da6e8fdb102fb1169465cbbabb3df4
dir: /lib/bio/iter.myr/

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use std
use "bio.use"

pkg bio =
	type lineiter = file#
	impl iterable lineiter -> byte[:]

	const byline	: (f : file# -> lineiter)
;;

const byline = {f
	-> f castto(lineiter)
}

impl iterable lineiter -> byte[:] =
	__iternext__ = {itp, outp
		match bio.readln(itp# castto(file#))
		| `Ok ln:
			outp# = ln
			-> true
		| `Eof:
			-> false
		| `Err _:
			-> false
		;;
	}

	__iterfin__ = {itp, outp
		std.slfree(outp#)
	}
;;