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core: add CRTP base class to unit types

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The goal here is to add general addition and scalar multiplication
functions to the unit types.

Thereto, we need a CRTP
(https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern)
base class.

However, this breaks compound initialization, so we have to use
named initializers:
	weight_t { 2000 } -> weight_t { .grams = 2000 }
The good thing is that this is exactly how these classes were
supposed to be used: make the unit explicit!

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-09-01 21:48:31 +02:00 • committed by bstoeger
parent 696ba61eef
commit 12ca172a9e
26 changed files with 127 additions and 138 deletions
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4
tests/testunitconversion.cpp
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@ -11,14 +11,14 @@ void TestUnitConversion::testUnitConversions()
QCOMPARE(nearly_equal(cuft_to_l(1), 28.316847), true);
QCOMPARE(nearly_equal(mm_to_feet(1000), 3.280840), true);
QCOMPARE(feet_to_mm(1), 305L);
QCOMPARE(to_feet((depth_t){1000}), 3);
QCOMPARE(to_feet(depth_t{ .mm = 1'000}), 3);
QCOMPARE(nearly_equal(mkelvin_to_C(647000), 373.85), true);
QCOMPARE(nearly_equal(mkelvin_to_F(647000), 704.93), true);
QCOMPARE(F_to_mkelvin(704.93), 647000UL);
QCOMPARE(C_to_mkelvin(373.85), 647000UL);
QCOMPARE(nearly_equal(psi_to_bar(14.6959488), 1.01325), true);
QCOMPARE(psi_to_mbar(14.6959488), 1013L);
QCOMPARE(nearly_equal(to_PSI((pressure_t){1013}), 14.6923228594), true);
QCOMPARE(nearly_equal(to_PSI(pressure_t{ .mbar = 1013}), 14.6923228594), true);
QCOMPARE(nearly_equal(bar_to_atm(1.013), 1.0), true);
QCOMPARE(nearly_equal(mbar_to_atm(1013), 1.0), true);
QCOMPARE(nearly_equal(mbar_to_PSI(1013), 14.6923228594), true);