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| author | Sylvain Henry <hsyl20@gmail.com> | 2018-06-15 16:23:53 -0400 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2018-06-15 16:23:54 -0400 |
| commit | fe770c211631e7b4c9b0b1e88ef9b6046c6585ef (patch) | |
| tree | e6a061a92d8d0d71d40c699982ee471627d816e0 /libraries/base/GHC/Show.hs | |
| parent | 42f3b53b5bc4674e41f16de08094821fe1aaec00 (diff) | |
| download | haskell-fe770c211631e7b4c9b0b1e88ef9b6046c6585ef.tar.gz | |
Built-in Natural literals in Core
Add support for built-in Natural literals in Core.
- Replace MachInt,MachWord, LitInteger, etc. with a single LitNumber
constructor with a LitNumType field
- Support built-in Natural literals
- Add desugar warning for negative literals
- Move Maybe(..) from GHC.Base to GHC.Maybe for module dependency
reasons
This patch introduces only a few rules for Natural literals (compared
to Integer's rules). Factorization of the built-in rules for numeric
literals will be done in another patch as this one is already big to
review.
Test Plan:
validate
test build with integer-simple
Reviewers: hvr, bgamari, goldfire, Bodigrim, simonmar
Reviewed By: bgamari
Subscribers: phadej, simonpj, RyanGlScott, carter, hsyl20, rwbarton,
thomie
GHC Trac Issues: #14170, #14465
Differential Revision: https://phabricator.haskell.org/D4212
Diffstat (limited to 'libraries/base/GHC/Show.hs')
| -rw-r--r-- | libraries/base/GHC/Show.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libraries/base/GHC/Show.hs b/libraries/base/GHC/Show.hs index 798dff9891..a41bf81cb3 100644 --- a/libraries/base/GHC/Show.hs +++ b/libraries/base/GHC/Show.hs @@ -479,6 +479,13 @@ instance Show Integer where | otherwise = integerToString n r showList = showList__ (showsPrec 0) +-- | @since 4.8.0.0 +instance Show Natural where +#if defined(MIN_VERSION_integer_gmp) + showsPrec p (NatS# w#) = showsPrec p (W# w#) +#endif + showsPrec p i = showsPrec p (naturalToInteger i) + -- Divide and conquer implementation of string conversion integerToString :: Integer -> String -> String integerToString n0 cs0 |