roland/xo-alloc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xo-unit: + natural_unit.abbrev()

Browse source
This commit is contained in:
Roland Conybeare 2024-04-23 10:33:56 -04:00
commit 6a3db2197e
2 changed files with 95 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

14
include/xo/unit/natural_unit.hpp
View file

@ -11,6 +11,8 @@
namespace xo {
namespace qty {
using nu_abbrev_type = flatstring<32>;
/** @class natural_unit
* @brief an array representing the cartesian product of distinct basis-power-units
*
@ -32,6 +34,18 @@ namespace xo {
constexpr std::size_t n_bpu() const { return n_bpu_; }
constexpr bpu<Int> * bpu_v() const { return bpu_v_; }
constexpr nu_abbrev_type abbrev() const {
nu_abbrev_type retval;
for (std::size_t i = 0; i < n_bpu_; ++i) {
if (i > 0)
retval.append(".");
retval.append(bpu_v_[i].abbrev(), 0, -1);
}
return retval;
}
constexpr void push_back(const bpu<Int> & bpu) {
if (n_bpu_ < n_dim)
bpu_v_[n_bpu_++] = bpu;

81
utest/unit.test.cpp
View file

@ -751,6 +751,87 @@ namespace xo {
}
} /*TEST_CASE(bpu_array_product3)*/
TEST_CASE("natural_unit0", "[natural_unit]") {
constexpr bool c_debug_flag = true;
// can get bits from /dev/random by uncommenting the 2nd line below
//uint64_t seed = xxx;
//rng::Seed<xoshio256ss> seed;
//auto rng = xo::rng::xoshiro256ss(seed);
scope log(XO_DEBUG2(c_debug_flag, "TEST_CASE.natural_unit0"));
//log && log("(A)", xtag("foo", foo));
{
constexpr natural_unit<int64_t> v
= (bpu_array_maker<int64_t>::make_bpu_array
(bpu<int64_t>(dim::distance, scalefactor_ratio_type(1, 1000), power_ratio_type(2, 1)),
bpu<int64_t>(dim::mass, scalefactor_ratio_type(1, 1000), power_ratio_type(-1, 1))));
static_assert(v.n_bpu() == 2);
log && log(xtag("v.abbrev", v.abbrev()));
static_assert(v.abbrev().size() > 0);
static_assert(v.abbrev() == flatstring("mm^2.mg^-1"));
}
} /*TEST_CASE(natural_unit0)*/
TEST_CASE("natural_unit1", "[natural_unit]") {
constexpr bool c_debug_flag = true;
// can get bits from /dev/random by uncommenting the 2nd line below
//uint64_t seed = xxx;
//rng::Seed<xoshio256ss> seed;
//auto rng = xo::rng::xoshiro256ss(seed);
scope log(XO_DEBUG2(c_debug_flag, "TEST_CASE.natural_unit1"));
//log && log("(A)", xtag("foo", foo));
{
constexpr natural_unit<int64_t> v
= (bpu_array_maker<int64_t>::make_bpu_array
(bpu<int64_t>(dim::distance, scalefactor_ratio_type(1000, 1), power_ratio_type(2, 1))));
static_assert(v.n_bpu() == 1);
log && log(xtag("v.abbrev", v.abbrev()));
static_assert(v.abbrev().size() > 0);
static_assert(v.abbrev() == flatstring("km^2"));
}
} /*TEST_CASE(natural_unit1)*/
TEST_CASE("natural_unit2", "[natural_unit]") {
constexpr bool c_debug_flag = true;
// can get bits from /dev/random by uncommenting the 2nd line below
//uint64_t seed = xxx;
//rng::Seed<xoshio256ss> seed;
//auto rng = xo::rng::xoshiro256ss(seed);
scope log(XO_DEBUG2(c_debug_flag, "TEST_CASE.natural_unit2"));
//log && log("(A)", xtag("foo", foo));
{
constexpr natural_unit<int64_t> v
= (bpu_array_maker<int64_t>::make_bpu_array
(bpu<int64_t>(dim::mass, scalefactor_ratio_type(1000, 1), power_ratio_type(1, 1)),
bpu<int64_t>(dim::distance, scalefactor_ratio_type(1, 1), power_ratio_type(1, 1)),
bpu<int64_t>(dim::time, scalefactor_ratio_type(1, 1), power_ratio_type(-2, 1))));
static_assert(v.n_bpu() == 3);
log && log(xtag("v.abbrev", v.abbrev()));
static_assert(v.abbrev().size() > 0);
static_assert(v.abbrev() == flatstring("kg.m.s^-2"));
}
} /*TEST_CASE(natural_unit2)*/
TEST_CASE("scaled_unit0", "[scaled_unit0]") {
constexpr bool c_debug_flag = true;