Comments only: explain why StgConApp is still useful

[ghc-hetmet.git] / compiler / stgSyn / StgSyn.lhs

diff --git a/compiler/stgSyn/StgSyn.lhs b/compiler/stgSyn/StgSyn.lhs
index 2749081..527848f 100644 (file)
--- a/compiler/stgSyn/StgSyn.lhs
+++ b/compiler/stgSyn/StgSyn.lhs
@@ -168,6 +168,8 @@ constructors, primitives, and literals.
 \begin{code}
   | StgLit     Literal
   
+       -- StgConApp is vital for returning unboxed tuples
+       -- which can't be let-bound first
   | StgConApp  DataCon
                [GenStgArg occ] -- Saturated