A number of functions scattered in GDL's code more or less do the same thing and should be factorized in one place in order to be easily maintained. Especially if these functions use basic system functions that may differ with the system (macOS, unix, MSW..). And, the factorized function should be documented (with Doxygen in mind).
Take the example of strtol() . It is

When running the regression, the resulting logs seem to end up in third_party/tests/$TEST/.... This of course is not unnoticed by git, so a git status shows a ton of non-added new files added.

To reproduce:

make
make regression
git status   # observe all the files

Build or test artifacts should never clutter the rest of the code-base (we should regard them as read-only in

Some of the grammars have a ".tree" and ".error" file. Read them as part of the test case and check the parsed output matches.

Delete the // on line 11 in test/g4/DoubleSemi.hs and we get the following error:

/home/karl/w/antlr-haskell/test/g4/DoubleSemi.hs:15:6: error:
    Not in scope: data constructor ‘T_WS’                    
   |                                                         
15 | isWS T_WS = True                                        
   |      ^^^^