feat: Surface::toStream overload without stream argument

[paulgessinger]

I'm adding a way that allows you to avoid having to write

surface->toStream(gctx, std::cout);
std::cout << std::endl;

and instead write

std::cout << surface->toStream(gctx) << std::endl;

This is done by returning a temporary helper struct that implements operator<<.

[andiwand]

I think @benjaminhuth did something similar here #1327 which requires std::tieing the surface and context

[benjaminhuth]

yeah, maybe this is more intuitive than std::cout << std::tie(surface, ctx) << std::endl. It will definitively give better compiler errors :D

[andiwand]

Should we replace it then and converge on one version?

[benjaminhuth]

Would be fine for me.

[benjaminhuth]

Could you add this also to the doxygen description of Acts::Surface, so that people easily find this method @paulgessinger ?

[paulgessinger]

Ha, I had forgotten all about #1327, I was playing around with a tuple argument, but I didn't actually know it would work with tie.

Up to you, I can also close this in favor of just sticking to #1327.

[paulgessinger]

@andiwand That's a breaking change then?

[benjaminhuth]

@paulgessinger Really up to you... If your unawareness of std::tie is a hint that this is too non-obvious, we can use this. Otherwise we just have one PR less, which is also not too bad^^

[github-actions]

📊: Physics performance monitoring for 7f28e0b

Full contents

physmon summary

• ✅ CKF truth_smeared
• ✅ IVF truth_smeared
• ✅ AMVF truth_smeared
• ✅ Track Summary CKF truth_smeared
• ✅ Seeding truth_estimated
• ✅ CKF truth_estimated
• ✅ IVF truth_estimated
• ✅ AMVF truth_estimated
• ✅ Track Summary CKF truth_estimated
• ✅ Seeding seeded
• ✅ CKF seeded
• ✅ IVF seeded
• ✅ AMVF seeded
• ✅ AMVF (+grid seeder) seeded
• ✅ Track Summary CKF seeded
• ✅ Seeding orthogonal
• ✅ CKF orthogonal
• ✅ IVF orthogonal
• ✅ AMVF orthogonal
• ✅ Track Summary CKF orthogonal
• ✅ Ambisolver seeded
• ✅ Ambisolver orthogonal
• ✅ Seeding ttbar
• ✅ CKF ttbar
• ✅ Ambisolver
• ✅ Track Summary CKF ttbar
• ✅ AMVF ttbar
• ✅ AMVF (+grid seeder) ttbar
• ✅ Truth tracking (GSF)
• ✅ Truth tracking
• ✅ Truth tracking (GX2F)
• ✅ Particles fatras
• ✅ Particles geant4

[benjaminhuth]

Let's get it in!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
66.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[acts-project-service]

🔴 Athena integration test results [7d825f6]

🔴 Some tests have failed!

Please investigate the pipeline!

status	job	report
🟢	run_unit_tests
🟢	test_ActsDumpGeometryIdentifiers
🟢	test_ActsCheckObjectCountsWorkflow
🟢	test_ActsEFTrackFit
🟢	test_ActsPersistifySeeds
🟢	test_ActsBenchmarkWithSpot
🟢	test_ActsAnalogueClustering
🟢	test_ActsWorkflowHeavyIons
🟢	test_ActsWorkflowFastTracking
🟢	test_ActsWorkflowCached
🟢	test_ActsWorkflow
🟢	test_ActsValidateAmbiguityResolution
🟢	test_ActsValidateResolvedTracks
🟢	test_ActsValidateTracks
🟢	test_ActsValidateActsCoreSpacePoints
🟢	test_ActsValidateActsSpacePoints
🟢	test_ActsValidateSeeds
🟢	test_ActsValidateOrthogonalSeeds
🟢	test_ActsValidateClusters
🟢	test_ActsPersistifyEDM
🟢	test_ActsGSFRefitting
🟢	test_ActsKfRefitting
🟢	test_ActsExtrapolationAlgTest
🟢	test_ActsITkTest
🟢	run_workflow_tests_run4_mc
🟢	run_workflow_tests_run2_mc
🔴	run_workflow_tests_run2_data
🟢	run_workflow_tests_run3_mc
🟢	run_workflow_tests_run3_data
🟢	run_art_test: test_data18_13TeV_1000evt
🟢	run_art_test: test_ttbarPU40_reco