diff options
Diffstat (limited to 'compiler/hsSyn/HsPat.hs')
| -rw-r--r-- | compiler/hsSyn/HsPat.hs | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/compiler/hsSyn/HsPat.hs b/compiler/hsSyn/HsPat.hs index 93ad9ec383..f7d18768df 100644 --- a/compiler/hsSyn/HsPat.hs +++ b/compiler/hsSyn/HsPat.hs @@ -620,7 +620,7 @@ isIrrefutableHsPat pat go1 (SigPatOut pat _) = go pat go1 (TuplePat pats _ _) = all go pats go1 (SumPat pat _ _ _) = go pat - go1 (ListPat {}) = False + go1 (ListPat {}) = False go1 (PArrPat {}) = False -- ? go1 (ConPatIn {}) = False -- Conservative @@ -632,15 +632,13 @@ isIrrefutableHsPat pat go1 (ConPatOut{ pat_con = L _ (PatSynCon _pat) }) = False -- Conservative - go1 (LitPat {}) = False - go1 (NPat {}) = False - go1 (NPlusKPat {}) = False + go1 (LitPat {}) = False + go1 (NPat {}) = False + go1 (NPlusKPat {}) = False - -- Both should be gotten rid of by renamer before - -- isIrrefutablePat is called - go1 (SplicePat {}) = urk pat - - urk pat = pprPanic "isIrrefutableHsPat:" (ppr pat) + -- We conservatively assume that no TH splices are irrefutable + -- since we cannot know until the splice is evaluated. + go1 (SplicePat {}) = False hsPatNeedsParens :: Pat a -> Bool hsPatNeedsParens (NPlusKPat {}) = True |