Leonardo de Moura 04e3f21783 chore: add OptionM monad ... Motivation: `Option` is data, `OptionM` is control.		2021-03-20 17:50:45 -07:00
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Basic.lean	chore: add OptionM monad	2021-03-20 17:50:45 -07:00
Macro.lean	chore: add expandInterpolatedStr helper function, rename msg! => m!	2020-11-14 13:52:52 -08:00