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db @[Word8] should be lazy in the content of the bytes #3

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db @[Word8] should be lazy in the content of the bytes #3

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7 changes: 6 additions & 1 deletion src/Z80/Assembler.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,12 @@ class Bytes a where
instance Bytes ByteString where
defb = defByteString
instance (b ~ Word8) => Bytes [b] where
defb = defByteString . BS.pack
defb bs = Z80 $ do
tell $ BS.pack bs
modify (incrementLoc . fromIntegral $ length bs)
-- The new location has to be computed lazily in the actual
-- content of the bytes, so that we can emit byte values
-- referring to later labels.

db :: Bytes a => a -> Z80ASM
db = defb
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