general: simplify a few unit manipulations

Now that we have defined addition and subtraction on unit
classes, let's use them in a few examples.

Yes, some of these are a bit pointless, because they are
of the kind
        a.mbar - b.mbar => (a-b).mbar

However, these probably should be further simplified
by storing the result in a unit type.

This commit is mostly a proof-of-concept.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-09-02 20:42:05 +02:00 committed by bstoeger
parent 729cc16fc5
commit 110e64bc66
14 changed files with 59 additions and 68 deletions

View file

@ -472,9 +472,9 @@ static bool is_same_cylinder(cylinder_t *cyl_a, cylinder_t *cyl_b)
static void merge_cylinder_type(cylinder_type_t *src, cylinder_type_t *dst)
{
if (!dst->size.mliter)
dst->size.mliter = src->size.mliter;
dst->size = src->size;
if (!dst->workingpressure.mbar)
dst->workingpressure.mbar = src->workingpressure.mbar;
dst->workingpressure = src->workingpressure;
if (dst->description.empty() || dst->description == "---") {
dst->description = std::move(src->description);
}