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| author | Kari Pahula <kaol@iki.fi> | 2019-09-24 16:33:15 +0300 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-09-25 13:52:48 -0400 |
| commit | 2970dc7ab95f7daa793112c6a4a682263561761c (patch) | |
| tree | bcbc7c565479441427e5e512b6c71d85ce6d497e /compiler/main/DynFlags.hs | |
| parent | 218c5dbfbd60a416588e1b952c167ebd18ef9c56 (diff) | |
| download | haskell-2970dc7ab95f7daa793112c6a4a682263561761c.tar.gz | |
Add -Wderiving-defaults (#15839)
Enabling both DeriveAnyClass and GeneralizedNewtypeDeriving can cause
a warning when no explicit deriving strategy is in use. This change adds
an enable/suppress flag for it.
Diffstat (limited to 'compiler/main/DynFlags.hs')
| -rw-r--r-- | compiler/main/DynFlags.hs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs index 5bd8cb819f..45a465bd9c 100644 --- a/compiler/main/DynFlags.hs +++ b/compiler/main/DynFlags.hs @@ -920,6 +920,7 @@ data WarningFlag = | Opt_WarnUnusedPackages -- Since 8.10 | Opt_WarnInferredSafeImports -- Since 8.10 | Opt_WarnMissingSafeHaskellMode -- Since 8.10 + | Opt_WarnDerivingDefaults deriving (Eq, Show, Enum) data Language = Haskell98 | Haskell2010 @@ -4026,6 +4027,7 @@ wWarningFlagsDeps = [ Opt_WarnDeferredOutOfScopeVariables, flagSpec "deprecations" Opt_WarnWarningsDeprecations, flagSpec "deprecated-flags" Opt_WarnDeprecatedFlags, + flagSpec "deriving-defaults" Opt_WarnDerivingDefaults, flagSpec "deriving-typeable" Opt_WarnDerivingTypeable, flagSpec "dodgy-exports" Opt_WarnDodgyExports, flagSpec "dodgy-foreign-imports" Opt_WarnDodgyForeignImports, @@ -4824,6 +4826,7 @@ standardWarnings -- see Note [Documenting warning flags] Opt_WarnPartialTypeSignatures, Opt_WarnUnrecognisedPragmas, Opt_WarnDuplicateExports, + Opt_WarnDerivingDefaults, Opt_WarnOverflowedLiterals, Opt_WarnEmptyEnumerations, Opt_WarnMissingFields, |