`<random>`: Fix catastrophic cancellation in `piecewise_linear_distribution` evaluation - #6350

Merged

Stephan T. Lavavej (StephanTLavavej) merged 7 commits into

microsoft:mainfrom

MattStephanson:gh6323

Jul 11, 2026

Commits on Jul 1, 2026

use more stable quadratic formula
Matt Stephanson (MattStephanson)
committed
7df2ba3
expose `std::lerp` machinery
Matt Stephanson (MattStephanson)
committed
7e25901
guard against 0/0
Matt Stephanson (MattStephanson)
committed
f0e99f4

Commits on Jul 2, 2026

Remove extra space in comment.
Stephan T. Lavavej (StephanTLavavej)
committed
3efc19e
Group together the unconditional headers, `<type_traits>` supersedes `<xtr1common>`.
Stephan T. Lavavej (StephanTLavavej)
committed
612ad26
Make the `b` and `p` arrays `static constexpr`.
Stephan T. Lavavej (StephanTLavavej)
committed
de6ac05

Commits on Jul 10, 2026

For `double _Px0`, `_Px0 == _Ty{0}` => `_Px0 == 0.0`
Stephan T. Lavavej (StephanTLavavej)
committed
5cd7f94