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Gennaro Prota
9271183ea8
The constructor taking a const CharT (&)[M] copied M - 1 characters
verbatim via assign(arr, M - 1), preserving any embedded NULs in the
input. This would violate the type's documented "no embedded NULs"
invariant.
const char arr[] = { '1', '2', '\0', '4', '5', '\0' };
static_cstring<5> s(arr);
// data_ holds {'1','2','\0','4','5','\0'} --- embedded NUL stored
Delegate to assign(arr) instead, which uses traits::length() to
determine the size. This matches the behavior of the other
CharT-accepting entry points (assign(const CharT*), the const CharT*
constructor) and makes the invariant self-enforcing at construction.
Note: In practice, this is a bug that would never surface, because the
array constructor is never chosen for static_cstring<N> s(arr)---the
pointer constructor always wins---but the array constructor is needed
for CTAD (deduction guide), so it better be correct.
This also means the test we added is, at the moment, superfluous.
Boost.StaticString
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Introduction
This library provides a dynamically resizable string of characters with
compile-time fixed capacity and contiguous embedded storage in which the
characters are placed within the string object itself. Its API closely
resembles that of std::string.
License
Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)