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
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io.lean	feat(library/system/io): add random number generator support in the io monad	2018-02-15 16:12:08 -08:00
io_interface.lean	feat(library/system/io): add random number generator support in the io monad	2018-02-15 16:12:08 -08:00
random.lean	feat(library/system): basic support for random numbers	2018-02-15 14:36:28 -08:00