Policy that checks the value is within [min, max]and reports violations.
Synopsis
Declared in <mp‐units/overflow_policies.h>
template<Quantity Q>
struct check_in_range;Description
If the quantity's representation type has a constraint_violation_handler specialization, the handler's on_violation() is called on out‐of‐bounds values (providing guaranteed enforcement regardless of build mode). Otherwise, falls back to MP_UNITS_EXPECTS, which may be disabled in release builds.
Example:
{cpp}
// With constrained<double, throw_policy> rep → throws std::domain_error on violation
// With plain double rep → asserts via MP_UNITS_EXPECTS (may be no-op in release)
template<>
constexpr auto quantity_bounds<equator> = check_in_range{-90 * deg, 90 * deg};Member Functions
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