Re: How to use `trace` while debuging GHC
On Mon, Nov 12, 2012 at 5:15 AM, Richard Eisenberg wrote: > > I've recently used the conveniently-typed (pprTrace :: String -> SDoc -> a -> a) for this purpose. You have to compile with -DDEBUG, but it works great. > > Richard To use pprTrace you don't actually need to compile with -DDEBUG, it only checks if -dno-debug-output has been specified on the command line: http://www.haskell.org/ghc/docs/latest/html/libraries/ghc/src/Outputable.html#pprTrace http://www.haskell.org/ghc/docs/latest/html/libraries/ghc/src/StaticFlags.html#opt_NoDebugOutput Cheers, Michal ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: How to use `trace` while debuging GHC
I've recently used the conveniently-typed (pprTrace :: String -> SDoc -> a -> a) for this purpose. You have to compile with -DDEBUG, but it works great. Richard On Nov 11, 2012, at 8:36 PM, Ian Lynagh wrote: > On Sun, Nov 11, 2012 at 05:24:06PM -0800, Iavor Diatchki wrote: >> >> There used to be a value called `tracingDynFlags` that I could use to dump >> values, but it has disappeared... Did it get moved somewhere, or is there >> a better way to get the same effect? > > There is now StaticFlags.unsafeGlobalDynFlags. > > > Thanks > Ian > > > ___ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: How to use `trace` while debuging GHC
On Sun, Nov 11, 2012 at 05:24:06PM -0800, Iavor Diatchki wrote: > > There used to be a value called `tracingDynFlags` that I could use to dump > values, but it has disappeared... Did it get moved somewhere, or is there > a better way to get the same effect? There is now StaticFlags.unsafeGlobalDynFlags. Thanks Ian ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
How to use `trace` while debuging GHC
Hello, While working on GHC sometimes I find it useful to dump the values of intermediate expressions, perhaps in the middle of pure code, using a combination of `trace` and `ppr`. The issue is that `ppr` returns an `SDoc`, and to turn an `SDoc` into a `String`, I need some `DynFlags`. There used to be a value called `tracingDynFlags` that I could use to dump values, but it has disappeared... Did it get moved somewhere, or is there a better way to get the same effect? -Iavor ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
