Re: [Haskell-cafe] code-as-config, run-time checks and error locations
This one[1] sounds so awesome! I just read the paper. In particular I like how one could access the current call stack structure live. However, the most recent changes to the code are from early 2009. Anyone knows what happened to this? [1] http://hackage.haskell.org/trac/ghc/wiki/ExplicitCallStack/CorePassImplementation ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] code-as-config, run-time checks and error locations
Dear Café, I'm working on a EDSL that will include both type checks (at compile time) and semantic checks (at run time). - Semantic properties are known at compile time but feel too complex to me to be encoded in the type system. If one of the runtime checks fails, I'd like to print the location of the error, i.e. not Error: Unknown field `AMOUNT' in table `ENTRIES' (where? why?) but Error: Unknown field `AMOUNT' in table `ENTRIES' Referenced at analysis1.hs:43:7 by `sumByInvoice' which was called at analysis1.hs:66:3 by `main' ENTRIES defined at analysis1.hs:13:8 I'm not yet sure which level of granularity I want for error messages and one can probably get arbitrarily fancy on this. For the moment I think it would be enough to auto-insert the location of calls to a certain set of functions. Any experience on this? Thanks a lot. -- Steffen ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] code-as-config, run-time checks and error locations
On Sun, Apr 7, 2013 at 12:23 AM, Steffen Schuldenzucker sschuldenzuc...@uni-bonn.de wrote: For the moment I think it would be enough to auto-insert the location of calls to a certain set of functions. Have you tried assert [1]? [1] http://hackage.haskell.org/packages/archive/base/4.6.0.1/doc/html/Control-Exception.html#v:assert -- Kim-Ee ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] code-as-config, run-time checks and error locations
Hi Steffen, most of the time I'm just using these cpp macros: #define __POS__(__FILE__ ++ : ++ show __LINE__) #define ERROR error $ __POS__ ++ - ++ Instead of writing 'error blub' you would write 'ERROR blub' and additionally get the file name and the line. There's a bracktracing functionality in the more recent versions of ghc. I think it has been discussed on this mailing list. Greetings, Daniel ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] code-as-config, run-time checks and error locations
Good Point! Doesn't quite meet my requirements (I don't want to show the error loc somewhere deep within the libs), but it led me here[1]. Reading through that now... [1] http://hackage.haskell.org/trac/ghc/wiki/ExplicitCallStack On 04/06/2013 07:51 PM, Kim-Ee Yeoh wrote: On Sun, Apr 7, 2013 at 12:23 AM, Steffen Schuldenzucker sschuldenzuc...@uni-bonn.de wrote: For the moment I think it would be enough to auto-insert the location of calls to a certain set of functions. Have you tried assert [1]? [1] http://hackage.haskell.org/packages/archive/base/4.6.0.1/doc/html/Control-Exception.html#v:assert -- Kim-Ee ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] code-as-config, run-time checks and error locations
On Sun, Apr 7, 2013 at 4:37 AM, Steffen Schuldenzucker sschuldenzuc...@uni-bonn.de wrote: Reading through that now... [1] http://hackage.haskell.org/trac/ghc/wiki/ExplicitCallStack If you're reading that page, you probably also want to get up to speed on the latest. The thread titled RFC: rewrite-with-location proposal just ended recently [1]. [1] http://www.haskell.org/pipermail/haskell-cafe/2013-February/106617.html -- Kim-Ee ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
