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libstdc++: Fix some -Wsign-compare warnings in headers

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In all these cases we know the value with signed type is not negative so
the cast is safe.

libstdc++-v3/ChangeLog:

	* include/bits/deque.tcc (deque::_M_shrink_to_fit): Cast
	difference_type to size_type to avoid -Wsign-compare warning.
	* include/std/spanstream (basic_spanbuf::seekoff): Cast
	streamoff to size_t to avoid -Wsign-compare warning.
This commit is contained in:
Jonathan Wakely
2025-09-27 12:47:45 +01:00
committed by Jonathan Wakely
parent f6c71c2079
commit c2ccc43dda
2 changed files with 3 additions and 3 deletions
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2
libstdc++-v3/include/bits/deque.tcc
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@@ -381,7 +381,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
const difference_type __back_capacity
= (this->_M_impl._M_finish._M_last - this->_M_impl._M_finish._M_cur);
if (__front_capacity + __back_capacity < _S_buffer_size())
if (size_type(__front_capacity + __back_capacity) < _S_buffer_size())
return false;
return std::__shrink_to_fit_aux<deque>::_S_do_it(*this);

4
libstdc++-v3/include/std/spanstream
View File

@@ -152,7 +152,7 @@ template<typename _CharT, typename _Traits>
if (__way == ios_base::beg)
{
if (0 <= __off && __off <= _M_buf.size())
if (0 <= __off && (size_t)__off <= _M_buf.size())
{
if (__which & ios_base::in)
this->setg(this->eback(), this->eback() + __off, this->egptr());
@@ -188,7 +188,7 @@ template<typename _CharT, typename _Traits>
if (__builtin_add_overflow(__base, __off, &__off)) [[unlikely]]
return __ret;
if (__off < 0 || __off > _M_buf.size()) [[unlikely]]
if (__off < 0 || (size_t)__off > _M_buf.size()) [[unlikely]]
return __ret;
if (__which & ios_base::in)