`prefixes`

The standardised SI prefixes, provided as type aliases of ratio. They can be used to express a value in terms of a SI unit, for example milli represents 1e-3.

namespace opentl {
    using yocto = ratio<1, 1000000000000000000000000>;
    using zepto = ratio<1, 1000000000000000000000>;
    using atto  = ratio<1, 1000000000000000000>;
    using femto = ratio<1, 1000000000000000>;
    using pico  = ratio<1, 1000000000000>;
    using nano  = ratio<1, 1000000000>;
    using micro = ratio<1, 1000000>;
    using milli = ratio<1, 1000>;
    using centi = ratio<1, 100>;
    using deci  = ratio<1, 10>;
    using deca  = ratio<10, 1>;
    using hecto = ratio<100, 1>;
    using kilo  = ratio<1000, 1>;
    using mega  = ratio<1000000, 1>;
    using giga  = ratio<1000000000, 1>;
    using tera  = ratio<1000000000000, 1>;
    using peta  = ratio<1000000000000000, 1>;
    using exa   = ratio<1000000000000000000, 1>;
    using zetta = ratio<1000000000000000000000, 1>;
    using yotta = ratio<1000000000000000000000000, 1>;
}

Type Aliases

Name	Value	Description
`yocto`	1e-24	Only when `intmax_t` is wide enough.
`zepto`	1e-21	Only when `intmax_t` is wide enough.
`atto`	1e-18
`femto`	1e-15
`pico`	1e-12
`nano`	1e-9
`micro`	1e-6
`milli`	1e-3
`centi`	1e-2
`deci`	1e-1
`deca`	1e1
`hecto`	1e2
`kilo`	1e3
`mega`	1e6
`giga`	1e9
`tera`	1e12
`peta`	1e15
`exa`	1e18
`zetta`	1e21	Only when `intmax_t` is wide enough.
`yotta`	1e24	Only when `intmax_t` is wide enough.

Example

#include <opentl/ratio.hpp>

int main() {
    using kilogram = opentl::kilo;
    static_assert(kilogram::num == 1000);
    static_assert(kilogram::den == 1);
}