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  1. Data Management
  2. DM-9936

Make some afw types usable in compile-time expressions

    Details

    • Type: Story
    • Status: To Do
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: afw, geom
    • Story Points:
      8
    • Epic Link:
    • Team:
      Alert Production

      Description

      Compile-time expressions (constexpr) are a C++11 feature that allows constants of any type to be used in contexts that previously required integers. Since this is a fully backward-compatible extension of a class's functionality, Effective Modern C++ recommends using constexpr anywhere where language rules and future implementation changes allow it.

      Retrofitting constexpr to all classes in afw is impractical, but constexpr support is most valuable for classes that represent simple data types (e.g., Angle or Point). This ticket therefore covers a subset of the following types, whose appropriateness will be determined when work begins:

      • afw::cameraGeom::CameraPoint
      • afw::cameraGeom::CameraSys
      • afw::cameraGeom::CameraSysPrefix
      • afw::cameraGeom::Orientation
      • afw::coord::Coord and its subclasses
      • afw::coord::Observatory
      • afw::coord::Weather
      • afw::detection::Threshold
      • afw::geom::Angle
      • afw::geom::AngleUnit
      • afw::geom::Box
      • afw::geom::CoordinateBase and its subclasses
      • afw::geom::CoordinateExpr
      • afw::geom::Span
      • afw::geom::SpherePoint
      • afw::geom::polygon::Polygon
      • afw::image::Calib
      • afw::image::Color
      • afw::image::DefectBase
      • afw::image::Filter
      • afw::image::FilterProperty
      • afw::math::FitResults
      • afw::math::Function and its subclasses
      • afw::math::MaskedVector
      • afw::math::Statistics
      • afw::table::BaseRecord and its subclasses
      • afw::table::ConstFunctorKey
      • afw::table::FieldBase and its subclasses
      • afw::table::InputFunctorKey and its subclasses
      • afw::table::KeyBase and its subclasses
      • afw::table::Match
      • afw::table::OutputFunctorKey and its subclasses
      • afw::table::ReferenceFunctorKey
      • afw::table::SchemaItem
      • afw::table::io::Persistable
      • afw::table::io::PersistableFacade

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          pschella Pim Schellart [X] (Inactive) added a comment -

          This would be awesome!

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          pschella Pim Schellart [X] (Inactive) added a comment - This would be awesome!

            People

            • Assignee:
              krzys Krzysztof Findeisen
              Reporter:
              krzys Krzysztof Findeisen
              Watchers:
              Krzysztof Findeisen, Pim Schellart [X] (Inactive)
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              Dates

              • Created:
                Updated: