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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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2
smtk-import/smartrak.cpp
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@ -1001,7 +1001,7 @@ void smartrak_import(const char *file, struct divelog *log)
/* No DC related data */
smtkdive->visibility = strtod((char *)col[coln(VISIBILITY)]->bind_ptr, NULL) > 25 ? 5 : lrint(strtod((char *)col[13]->bind_ptr, NULL) / 5);
weightsystem_t ws = { {(int)lrint(strtod((char *)col[coln(WEIGHT)]->bind_ptr, NULL) * 1000)}, std::string(), false };
weightsystem_t ws = { { .grams = (int)lrint(strtod((char *)col[coln(WEIGHT)]->bind_ptr, NULL) * 1000)}, std::string(), false };
smtkdive->weightsystems.push_back(std::move(ws));
smtkdive->suit = get(suit_list, atoi((char *)col[coln(SUITIDX)]->bind_ptr) - 1);
smtk_build_location(mdb_clon, (char *)col[coln(SITEIDX)]->bind_ptr, &smtkdive->dive_site, log);