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Diffstat (limited to 'docs/users_guide/8.12.1-notes.rst')
| -rw-r--r-- | docs/users_guide/8.12.1-notes.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/users_guide/8.12.1-notes.rst b/docs/users_guide/8.12.1-notes.rst index dd429c22d4..ea198f5167 100644 --- a/docs/users_guide/8.12.1-notes.rst +++ b/docs/users_guide/8.12.1-notes.rst @@ -224,6 +224,13 @@ Language f = (- x) -- operator section c = (-x) -- negation +* The behavior of :extension:`NegativeLiterals` changed, and now we require + that a negative literal must not be preceded by a closing token (see + `GHC Proposal #229 <https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0229-whitespace-bang-patterns.rst>`__ + for the definition of a closing token). In other words, we parse ``f -123`` + as ``f (-123)``, but ``x-123`` as ``(-) x 123``. Before this amendment, + :extension:`NegativeLiterals` caused ``x-123`` to be parsed as ``x(-123)``. + Compiler ~~~~~~~~ |