mp_units::is_integral_scaling¶
Returns true if the scaling factor from from to to is an exact positive integer.
Synopsis¶
Declared in <mp-units/framework/value_cast.h>
[[nodiscard]] consteval bool is_integral_scaling(auto from, auto to);Description¶
This is the key predicate used by the default implicitly_scalable to decide whether conversions between integer-like representation types are non-truncating (and therefore may be implicit). For example, m → mm has an integral factor (×1000), so integer conversions in that direction are implicit; mm → m has a fractional factor (÷1000), so they are explicit.
Return Value¶
Note
The return value should not be discarded.
Parameters¶
| Name | Description |
|---|---|
| from | source unit |
| to | target unit |