Hello,
I would like to automatize in a script the simple detection of errors in the ROOT interactive shell.
Hoe can I know if the last command had a wrong syntax (e.g. “WHILE (true);”) or if the last CINT command (e.g. “.L myMacro.C+”) has failed?
Thank you!
Hi,
I don’t know how you want to interact with the shell. Depending on that my answer might differ 
EE.g. you could use TInterpreter::ProcessLine() which allows you to retrieve the error code.
Cheers, Axel.
Well, the easiest way for me would be to enter directly the commands through CINT:
.L myMacro.C+
// check if something went wrong...
inr i = 0;
// check that something went wrong...
I hoped there was a gInterpreter method to retrieve the status of the last operation, but I couldn’t find any (TInterpreter::GetExitCode() doesn’t).
The alternative you suggest is to call the interpreter object to process every single line.
Would that be like:
TInterpreter::EErrorCode CINTerror = 0;
gInterpreter->ProcessLine(".L myMacro.C+", &CINTerror);
if (CINTerror != TInterpreter::kNoError) { std::cerr << "Bad dog!!!" << std::endl; exit(CINTerror); }
gInterpreter->ProcessLine("inr i = 0;", &CINTerror);
if (CINTerror != TInterpreter::kNoError) { std::cerr << "Bad dog!!!" << std::endl; exit(CINTerror); }
?
In both cases, the text in the code tag would be passed to root.exe through a pipe.
Hi,
To get the error from ACLiC, you can call directly TSystem::CompileMacro:int i = gSystem->CompileMacro("myMacro.C","k");where 0 indicates failure.
To catch the output, you will need to redirect stdout and stderr to a file and look at the file. The simpliest being the following:int result = gROOT->ProcessLine("gSystem->CompileMacro(\"myMacro.C\",\"k\"); >& build.log ");
Cheers,
Philippe.