"How do I find out a function's strictness?"

[Francis Girard]

Hi, 

In the ghc manual I read :

"How do I find out a function's strictness?"
Don't guess-look it up.

Look for your function in the interface file, then for the third field in the 
pragma; it should say __S <string>. The <string> gives the strictness of the 
function's arguments. L is lazy (bad), S and E are strict (good), P is 
"primitive" (good), U(...) is strict and "unpackable" (very good), and A is 
absent (very good).

--

When I look in the *.hi binary files generated by ghc with ghc --show-iface, I 
don't see anything like "__S" anywhere.

Where should I look ?

Thank you

Francis Girard
francis.girard@free.fr
LE CONQUET, France