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QVarLengthArray: centralize index checking

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Factor the assertions relating to sizes and indexes into an inline
function, verify(). This hopefully reduces the string data generated
for assertions to the bare minimum.

Change-Id: Iad5c2e587ad189e7e1a62b9ca61ada4282c44f51
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Marc Mutz 2021-12-06 16:37:02 +01:00
parent 78df625510
commit 06ba067a34
1 changed files with 22 additions and 13 deletions
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35
src/corelib/tools/qvarlengtharray.h
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@ -62,6 +62,15 @@ class QVarLengthArray
{
static_assert(std::is_nothrow_destructible_v<T>, "Types with throwing destructors are not supported in Qt containers.");
Q_ALWAYS_INLINE void verify(qsizetype pos = 0, qsizetype n = 1) const
{
// verify that [data() + pos, data() + pos + n[ is a valid range
Q_ASSERT(pos >= 0);
Q_ASSERT(pos <= size());
Q_ASSERT(n >= 0);
Q_ASSERT(n <= size() - pos);
}
public:
QVarLengthArray() noexcept
: a{Prealloc}, s{0}, ptr{reinterpret_cast<T *>(array)}
@ -156,7 +165,7 @@ public:
inline void removeLast()
{
Q_ASSERT(size() > 0);
verify();
if constexpr (QTypeInfo<T>::isComplex)
data()[size() - 1].~T();
--s;
@ -166,22 +175,22 @@ public:
inline qsizetype length() const { return size(); }
inline T &first()
{
Q_ASSERT(!isEmpty());
verify();
return *begin();
}
inline const T &first() const
{
Q_ASSERT(!isEmpty());
verify();
return *begin();
}
T &last()
{
Q_ASSERT(!isEmpty());
verify();
return *(end() - 1);
}
const T &last() const
{
Q_ASSERT(!isEmpty());
verify();
return *(end() - 1);
}
inline bool isEmpty() const { return size() == 0; }
@ -201,12 +210,12 @@ public:
inline T &operator[](qsizetype idx)
{
Q_ASSERT(idx >= 0 && idx < size());
verify(idx);
return data()[idx];
}
inline const T &operator[](qsizetype idx) const
{
Q_ASSERT(idx >= 0 && idx < size());
verify(idx);
return data()[idx];
}
inline const T &at(qsizetype idx) const { return operator[](idx); }
@ -574,23 +583,23 @@ Q_OUTOFLINE_TEMPLATE T QVarLengthArray<T, Prealloc>::value(qsizetype i, const T
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::insert(qsizetype i, T &&t)
{ Q_ASSERT_X(i >= 0 && i <= size(), "QVarLengthArray::insert", "index out of range");
{ verify(i, 0);
insert(cbegin() + i, std::move(t)); }
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::insert(qsizetype i, const T &t)
{ Q_ASSERT_X(i >= 0 && i <= size(), "QVarLengthArray::insert", "index out of range");
{ verify(i, 0);
insert(begin() + i, 1, t); }
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::insert(qsizetype i, qsizetype n, const T &t)
{ Q_ASSERT_X(i >= 0 && i <= size(), "QVarLengthArray::insert", "index out of range");
{ verify(i, 0);
insert(begin() + i, n, t); }
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::remove(qsizetype i, qsizetype n)
{ Q_ASSERT_X(i >= 0 && n >= 0 && i + n <= size(), "QVarLengthArray::remove", "index out of range");
{ verify(i, n);
erase(begin() + i, begin() + i + n); }
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::remove(qsizetype i)
{ Q_ASSERT_X(i >= 0 && i < size(), "QVarLengthArray::remove", "index out of range");
{ verify(i);
erase(begin() + i, begin() + i + 1); }
template <class T, qsizetype Prealloc>
template <typename AT>
@ -614,7 +623,7 @@ inline void QVarLengthArray<T, Prealloc>::prepend(const T &t)
template <class T, qsizetype Prealloc>
inline void QVarLengthArray<T, Prealloc>::replace(qsizetype i, const T &t)
{
Q_ASSERT_X(i >= 0 && i < size(), "QVarLengthArray::replace", "index out of range");
verify(i);
const T copy(t);
data()[i] = copy;
}