Hall A Analyzer

Maintenance of output definition files could be made easier if sections of definitions could be enabled by conditionals like preprocessor #if or #ifdef. The variables involved could be set via the THaTextvars interface. ("Textvars" are already expanded before processing the output definitions.) Example

#if ${replaydetail} > 5
block ${arm}.vdc.*
#endif

After pre-scanning the output definition file with replaydetail set to "10" and arm set to "L", the parser would see

#if 10 > 5
block L.vdc.*
#endif

The expression 10 > 5 would be evaluated as true, and so all L.vdc.* variables will be included in the output.

Expressions should support the usual comparisons (==, >, <, etc.) and logicals (&&, ||), parentheses, etc. Maybe implement it as a temporary TFormula?