Not yet implemented in GDL. Since my institution has an IDL license, I can just include the standard IDL library in my path but this is not a long-term solution. (Same applies to the CW_ programs, as noted in other issues).

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                                        
   |      ^^^^