3 commits

Author	SHA1	Message	Date
Leonardo de Moura	ac13f8b0f9	feat(library/system/io): add random number generator support in the io monad ... @aqjune @nunoplopes: See new tests at tests/lean/run/random.lean We have two actions in `io`. By default, `io` uses the C++ random number generator, but we can force it to use a `std_gen` with the action `set_rand_gen`. def rand (lo : nat := std_range.1) (hi : nat := std_range.2) : io nat def set_rand_gen : std_gen → io unit	2018-02-15 16:12:08 -08:00
Sebastian Ullrich	b3262d53b4	feat(frontends/lean/elaborator): structure notation: fall back to inferring superclasses	2018-02-02 08:58:53 -08:00
Leonardo de Moura	0ad5497462	refactor(library/io): make io easier to extend and use	2018-01-23 15:03:31 -08:00