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Mateusz Pusz 036efbdc0b feat(scripts): two-axis character labels and a merged Traits column in the reference

Update the systems reference generator for the two-axis quantity character and to reduce
the quantities table width:

- The Character column now prints the order with a `complex` prefix only when the field is
  complex (`scalar`, `complex scalar`, `vector`, `tensor`, `complex vector`,
  `complex tensor`), replacing the old `Real`/`Complex`/`Vector`/`Tensor` labels that mixed
  the two axes and could not express complex vectors or tensors.
- The separate `is_kind` and `non_negative` boolean columns are merged into one `Traits`
  column that shows `kind` and/or `≥ 0` only when set (blank otherwise), dropping a column
  and the per-row ticks.

Regenerated the affected systems reference pages.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-25 00:21:18 +02:00

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Natural System

Namespace: mp_units::natural

Module: mp_units.systems

Header: <mp-units/systems/natural.h>

Dimensions

Name	Symbol
`dim_energy`	E

Quantities

Quantity	Character	Dimension	Traits	Kind of	Parent	Equation	Hierarchy
`acceleration`	scalar	E	≥ 0	`energy`	`energy`	`velocity / duration`	view
`angular_measure`	scalar	—	kind	`angular_measure`	`dimensionless`	—	view
`dimensionless`	scalar	1	kind	`dimensionless`	—	—	—
`duration`	scalar	E⁻¹		`inverse_energy`	`inverse_energy`	—	view
`energy`	scalar	E	kind ≥ 0	`energy`	—	—	view
`energy_squared`	scalar	E²	kind	`energy_squared`	—	`pow<2>(energy)`	view
`force`	scalar	E²		`energy_squared`	`energy_squared`	`energy_squared`	view
`inverse_energy`	scalar	E⁻¹	kind	`inverse_energy`	—	`inverse(energy)`	view
`length`	scalar	E⁻¹		`inverse_energy`	`inverse_energy`	—	view
`mass`	scalar	E	≥ 0	`energy`	`energy`	—	view
`momentum`	scalar	E	≥ 0	`energy`	`energy`	`mass * velocity`	view
`speed`	scalar	—	kind	`speed`	`dimensionless`	`length / duration`	view
`velocity`	scalar	—		`speed`	`speed`	—	view

Units

Unit Name	Symbol	unit_symbol	Definition
`electronvolt`	eV	—	`kind: energy`
`gigaelectronvolt`	—	`GeV`	`si::giga<electronvolt>`

Constants

Name	Symbol	unit_symbol	Definition
`reduced_planck_constant`	\u210f (hbar)	`hbar`	`one`
`speed_of_light_in_vacuum`	c	`c`	`one`

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