If you look in the manual you'll see that it says you can only compile-time-call a function that is in a separate module. So put 'pr/gen/parse' in a separate module and you'll be fine.
The manual may not be very clear... pls help me improve it. S | -----Original Message----- | From: Mike Thomas [mailto:[EMAIL PROTECTED]] | Sent: 27 November 2002 06:19 | To: [EMAIL PROTECTED] | Subject: Template Haskell | | Hi there. | | Could somebody please let me know where I've gone wrong in the program below | (yesterday's CVS HEAD stage 3 compiler on Windows)? | | ------------- TH - printf.hs --- | | module Main where | | import Language.Haskell.THSyntax | | data Format = D | S | L String | | main = putStrLn ( $(pr "Hello") ) | | parse :: String -> [Format] | parse s = [ L s ] | | gen :: [Format] -> Expr | gen [D] = [| \n -> show n |] | gen [S] = [| \s -> s |] | gen [L s] = string s | | pr :: String -> Expr | pr s = gen (parse s) | | | ------------- Command Line ----- | | /c/cvs/i386-unknown-mingw32/stage3/ghc/compiler/ghc-inplace -fglasgow-exts - | package haskell-src printf.hs -o printf.exe | | ------------- GHC output--------- | | printf.hs:7: | Stage error: `pr' is bound at stage 1 but used at stage 0 | In the first argument of `putStrLn', namely `($[splice](pr "Hello"))' | In a right-hand side of function `main': | putStrLn ($[splice](pr "Hello")) | In the definition of `main': main = putStrLn ($[splice](pr "Hello")) | | ----------------------------------- | | Thanks | | Mike Thomas. | | | _______________________________________________ | Glasgow-haskell-users mailing list | [EMAIL PROTECTED] | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
