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@mpusz mpusz released this 24 Sep 18:21
· 1112 commits to master since this release
v2.0.0
daf4657

IMPORTANT: This is a breaking release. The mp-units library got totally new look & feel with the V2 engine.

  • units namespace renamed to mp_units (#317)
  • header files in the <mp-units/...> rather then in <units/...> (#317)
  • the downcasting facility is removed (#383, #211, #32)
  • unified and simplified quantity creation (#274)
  • determining the best way to create a quantity (#413)
  • V2 quantity_point (#414)
  • introduction of quantity_spec to store not only dimension but also additional information about quantities (#405)
  • quantity now takes reference object, which aggregates quantity_spec and a unit and a representation type
  • units, prefixes, dimensions, quantity specifications, and references are passed as NTTPs to templates and provide arithmetic operations and comparison
  • expression templates consistently used in all derived types to increase the readability (#351, #166)
  • derived dimensions are now factors of only base dimensions (#281)
  • convertibility of derived quantities (#427)
  • dimensions, quantity specifications, units, and references are now composable, significantly reducing the number of definitions and resulting types
  • heavily simplified unit systems definitions (no need to define unnamed derived units, systems-specific dimensions, aliases for quantities, concepts, UDLs, ... anymore)
  • improved definition of all systems
  • support for ISO 80000 Part 3-6 quantities
  • faster than lightspeed constants (#169)
  • extensions to quantity formatting with fmt
  • quantity_kind removed
  • improved casting of unit with .in(Unit), .force_in(Unit) for quantity and quantity_spec
  • numerical value accessor safety improved with .numerical_value_in(Unit) and .force_numerical_value_in(Unit)
  • quantity can no longer be constructed with a raw value (#434)
  • Implicit construction of quantities from a value (#410)
  • quantity_point can no longer be constructed with just a quantity and an explicit PointOrigin is always needed
  • ceil and floor are dangerous (#432)
  • quecto, ronto, ronna, quetta new SI prefixes support
  • comparison against zero added (#487)
  • documentation rewritten from scratch
  • many smaller changes not possible to address with the previous design (#205, #210, #134)
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