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Measurement example updated

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Mateusz Pusz
2020-03-25 16:30:08 +01:00
parent f2c14dfa34
commit 52e7f57c69
1 changed files with 25 additions and 2 deletions
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27
example/measurement.cpp
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@@ -40,8 +40,7 @@ public:
measurement() = default; measurement() = default;
constexpr /* explicit */ measurement(const value_type& val, const value_type& err = {}) : constexpr explicit measurement(const value_type& val, const value_type& err = {}) :
// cannot be explicit as `magma` concept requires implicit conversions :-(
value_(val), value_(val),
uncertainty_(std::abs(err)) uncertainty_(std::abs(err))
{ {
@@ -72,12 +71,36 @@ public:
return measurement(val, val * rss(lhs.relative_uncertainty(), rhs.relative_uncertainty())); return measurement(val, val * rss(lhs.relative_uncertainty(), rhs.relative_uncertainty()));
} }
[[nodiscard]] friend constexpr measurement operator*(const measurement& lhs, const value_type& value)
{
const auto val = lhs.value() * value;
return measurement(val, val * lhs.relative_uncertainty());
}
[[nodiscard]] friend constexpr measurement operator*(const value_type& value, const measurement& rhs)
{
const auto val = rhs.value() * value;
return measurement(val, val * rhs.relative_uncertainty());
}
[[nodiscard]] friend constexpr measurement operator/(const measurement& lhs, const measurement& rhs) [[nodiscard]] friend constexpr measurement operator/(const measurement& lhs, const measurement& rhs)
{ {
const auto val = lhs.value() / rhs.value(); const auto val = lhs.value() / rhs.value();
return measurement(val, val * rss(lhs.relative_uncertainty(), rhs.relative_uncertainty())); return measurement(val, val * rss(lhs.relative_uncertainty(), rhs.relative_uncertainty()));
} }
[[nodiscard]] friend constexpr measurement operator/(const measurement& lhs, const value_type& value)
{
const auto val = lhs.value() / value;
return measurement(val, val * lhs.relative_uncertainty());
}
[[nodiscard]] friend constexpr measurement operator/(const value_type& value, const measurement& rhs)
{
const auto val = value / rhs.value();
return measurement(val, val * rhs.relative_uncertainty());
}
#if __GNUC__ >= 10 #if __GNUC__ >= 10
[[nodiscard]] friend constexpr auto operator<=>(const measurement& lhs, const measurement& rhs) = default; [[nodiscard]] friend constexpr auto operator<=>(const measurement& lhs, const measurement& rhs) = default;