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Use std::numeric_limits<...>::lowest...

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... not the negation of max(), which is wrong for unsigned types, and not
min(), which gives least normalized positive value for floating point types.

lowest() wasn't available before C++11.
This commit is contained in:
Paul Licameli 2018-09-09 12:27:20 -04:00
parent e456b53344
commit 7ab97c969c
3 changed files with 5 additions and 6 deletions
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3
src/MemoryX.h
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@ -552,8 +552,7 @@ struct IteratorRange : public std::pair<Iterator, Iterator> {
R max( Unary unary_op = {} ) const
{
return this->accumulate(
-std::numeric_limits< R >::max(),
// std::numeric_limits< R >::lowest(), // TODO C++11
std::numeric_limits< R >::lowest(),
(const R&(*)(const R&, const R&)) std::max,
unary_op
);

2
src/Project.cpp
View File

@ -1940,7 +1940,7 @@ void AudacityProject::FixScrollbars()
panelHeight = 0;
}
auto LastTime = -std::numeric_limits<double>::max();
auto LastTime = std::numeric_limits<double>::lowest();
auto &tracks = *GetTracks();
for (const Track *track : tracks) {
// Iterate over pending changed tracks if present.

6
src/widgets/valnum.h
View File

@ -174,7 +174,7 @@ public:
void SetMin(ValueType min)
{
this->DoSetMin(min);
BaseValidator::m_minSet = (min != std::numeric_limits<T>::min());
BaseValidator::m_minSet = (min != std::numeric_limits<T>::lowest());
}
void SetMax(ValueType max)
@ -461,7 +461,7 @@ public:
FloatingPointValidator(int precision,
ValueType *value = NULL,
NumValidatorStyle style = NumValidatorStyle::DEFAULT,
ValueType min = -std::numeric_limits<ValueType>::max(),
ValueType min = std::numeric_limits<ValueType>::lowest(),
ValueType max = std::numeric_limits<ValueType>::max())
: Base(value, style)
{
@ -482,7 +482,7 @@ private:
// NB: Do not use min(), it's not the smallest representable value for
// the floating point types but rather the smallest representable
// positive value.
this->DoSetMin(-std::numeric_limits<ValueType>::max());
this->DoSetMin( std::numeric_limits<ValueType>::lowest());
this->DoSetMax( std::numeric_limits<ValueType>::max());
}
};