Rename literal constructors

In a previous patch we replaced some built-in literal constructors
(MachInt, MachWord, etc.) with a single LitNumber constructor.

In this patch we replace the `Mach` prefix of the remaining constructors
with `Lit` for consistency (e.g., LitChar, LitLabel, etc.).

Sadly the name `LitString` was already taken for a kind of FastString
and it would become misleading to have both `LitStr` (literal
constructor renamed after `MachStr`) and `LitString` (FastString
variant). Hence this patch renames the FastString variant `PtrString`
(which is more accurate) and the literal string constructor now uses the
least surprising `LitString` name.

Both `Literal` and `LitString/PtrString` have recently seen breaking
changes so doing this kind of renaming now shouldn't harm much.

Reviewers: hvr, goldfire, bgamari, simonmar, jrtc27, tdammers

Subscribers: tdammers, rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4881

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/stranal/WwLib.hs b/compiler/stranal/WwLib.hs
index 8a2ecc2016..f01dc6c385 100644
--- a/compiler/stranal/WwLib.hs
+++ b/compiler/stranal/WwLib.hs
@@ -922,7 +922,7 @@ buggily is used we'll get a runtime error message.
 
 Coping with absence for *unlifted* types is important; see, for
 example, Trac #4306 and Trac #15627.  In the UnliftedRep case, we can
-use RubbishLit, which we need to apply to the required type.
+use LitRubbish, which we need to apply to the required type.
 For the unlifted types of singleton kind like Float#, Addr#, etc. we
 also find a suitable literal, using Literal.absentLiteralOf.  We don't
 have literals for every primitive type, so the function is partial.