Skip to content
Snippets Groups Projects
Commit 08efb089 authored by Simon Peyton Jones's avatar Simon Peyton Jones
Browse files

Improve error messages

parent 7a0cab9b
No related merge requests found
Hide whitespace changes
Inline Side-by-side
compiler/typecheck/TcDeriv.lhs
+ 1
− 1
View file @ 08efb089
......@@ -654,7 +654,7 @@ cond_mayDeriveDataTypeable (mayDeriveDataTypeable, _)
| mayDeriveDataTypeable = Nothing
| otherwise = Just why
where
why = ptext SLIT("You need -fglasgow-exts to derive an instance for this class")
why = ptext SLIT("You need -XDeriveDataTypeable to derive an instance for this class")
std_class_via_iso :: Class -> Bool
std_class_via_iso clas -- These standard classes can be derived for a newtype
......
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment