[PWGCF] Add task for correlation study with MPI proxy event classification

[EmilGorm]

No description provided.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 0 warnings, 🔕 1 disabled

[EmilGorm]

O2Linter error related to other workflow names in CMakeLists.txt

[alibuild]

Error while checking build/O2Physics/code-check for 6d72155 at 2026-07-20 20:28:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 24 errors and 36 warnings.'
Found 24 errors and 36 warnings.
++ [[ 24 -gt 0 ]]
++ cat /sw/BUILD/16d04015a1011b1afd5fb5a7c594c5c4d6a500aa/O2Physics-code-check/errors.txt
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:48:1: error: included header TH1D.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:51:1: error: included header TMath.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:52:1: error: included header TVector2.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:76:18: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:78:8: error: constructor does not initialize these fields: multCutFormulaParamIndex, ccdb [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:104:63: error: do not implicitly decay an array into a pointer; consider using gsl::array_view or an explicit cast instead [cppcoreguidelines-pro-bounds-array-to-pointer-decay,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:206:11: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:208:11: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:210:11: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:212:11: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:214:11: error: implicit conversion 'int' -> 'bool' [readability-implicit-bool-conversion,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:378:33: error: the parameter 'target' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:378:52: error: the parameter 'collision' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:663:47: error: redundant boolean literal supplied to boolean operator [readability-simplify-boolean-expr,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:666:34: error: do not use reinterpret_cast [cppcoreguidelines-pro-type-reinterpret-cast,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:675:50: error: redundant boolean literal supplied to boolean operator [readability-simplify-boolean-expr,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:678:37: error: do not use reinterpret_cast [cppcoreguidelines-pro-type-reinterpret-cast,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:692:5: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:697:31: error: do not implicitly decay an array into a pointer; consider using gsl::array_view or an explicit cast instead [cppcoreguidelines-pro-bounds-array-to-pointer-decay,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:715:56: error: no header providing "Form" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:860:60: error: redundant boolean literal supplied to boolean operator [readability-simplify-boolean-expr,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:944:78: error: redundant boolean literal supplied to boolean operator [readability-simplify-boolean-expr,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:1044:5: error: switching on non-enum value without default case may not cover all cases [bugprone-switch-missing-default-case,-warnings-as-errors]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:1057:5: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
++ [[ 36 -gt 0 ]]
++ cat /sw/BUILD/16d04015a1011b1afd5fb5a7c594c5c4d6a500aa/O2Physics-code-check/warnings.txt
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:203:40: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:206:62: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:208:62: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:210:67: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:212:71: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:214:62: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:292:48: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:330:111: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:352:119: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:357:150: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:430:41: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:433:98: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:444:71: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:505:122: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:509:54: warning: statement should be inside braces [readability-braces-around-statements]
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:517:75: warning: statement should be inside braces [readability-braces-around-statements]
[0 more errors; see full log]

Full log here.

[alibuild]

Error while checking build/O2Physics/code-check for 03fb690 at 2026-07-21 08:29:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:74:98: error: too many initializers for 'std::array<float, 1>'
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:719:30: error: no matching function for call to 'THn::GetBinContent(std::array<int, 4>&)'
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/staging for 03fb690 at 2026-07-21 08:31:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:74:98: error: too many initializers for 'std::array<float, 1>'
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:719:30: error: no matching function for call to 'THn::GetBinContent(std::array<int, 4>&)'
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/code-check for ee5d5ed at 2026-07-21 08:44:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 1 errors and 0 warnings.'
Found 1 errors and 0 warnings.
++ [[ 1 -gt 0 ]]
++ cat /sw/BUILD/45758bba9861933a56af420d3a7c1f6da9644acf/O2Physics-code-check/errors.txt
PWGCF/TwoParticleCorrelations/Tasks/twoParticleCorrelationsMpi.cxx:714:5: error: uninitialized record type: 'effVars' [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 1 -gt 0 ]]
++ exit 1
--

Full log here.