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-rw-r--r--compiler/GHC/Data/FastString.hs3
-rw-r--r--compiler/GHC/Utils/Encoding.hs3
2 files changed, 4 insertions, 2 deletions
diff --git a/compiler/GHC/Data/FastString.hs b/compiler/GHC/Data/FastString.hs
index 604c8f3e25..133079d27d 100644
--- a/compiler/GHC/Data/FastString.hs
+++ b/compiler/GHC/Data/FastString.hs
@@ -196,7 +196,8 @@ data FastString = FastString {
n_chars :: {-# UNPACK #-} !Int, -- number of chars
fs_sbs :: {-# UNPACK #-} !ShortByteString,
fs_zenc :: FastZString
- -- ^ Lazily computed z-encoding of this string.
+ -- ^ Lazily computed z-encoding of this string. See Note [Z-Encoding] in
+ -- GHC.Utils.Encoding.
--
-- Since 'FastString's are globally memoized this is computed at most
-- once for any given string.
diff --git a/compiler/GHC/Utils/Encoding.hs b/compiler/GHC/Utils/Encoding.hs
index 592b0bd40e..68ebeedaf7 100644
--- a/compiler/GHC/Utils/Encoding.hs
+++ b/compiler/GHC/Utils/Encoding.hs
@@ -277,7 +277,8 @@ utf8EncodedLength str = go 0 str
| otherwise = go (n+4) cs
-- -----------------------------------------------------------------------------
--- The Z-encoding
+-- Note [Z-Encoding]
+-- ~~~~~~~~~~~~~~~~~
{-
This is the main name-encoding and decoding function. It encodes any