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Fix throwing in constexpr and substr for gcc 5

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This commit is contained in:
Krystian Stasiowski
2020-03-09 17:47:40 -04:00
parent b7de5db7b8
commit e7e54b2665
3 changed files with 217 additions and 76 deletions
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48
test/constexpr_tests.hpp
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@ -22,16 +22,39 @@ struct cxper_char_traits
using int_type = int;
using state_type = std::mbstate_t;
static constexpr void assign(char_type&, const char_type&) noexcept {}
static constexpr bool eq(char_type, char_type) noexcept { return true; }
static constexpr bool lt(char_type, char_type) noexcept { return true; }
static constexpr void assign(char_type& a, const char_type& b) noexcept { a = b; }
static constexpr bool eq(char_type a, char_type b) noexcept { return a == b; }
static constexpr bool lt(char_type a, char_type b) noexcept { return a < b; }
static constexpr int compare(const char_type*, const char_type*, std::size_t) { return 0; }
static constexpr std::size_t length(const char_type*) { return 0; }
static constexpr std::size_t length(const char_type* s)
{
std::size_t n = 0;
while (*(s++));
return n;
}
static constexpr const char_type* find(const char_type*, std::size_t, const char_type&){ return 0; }
static constexpr char_type* move(char_type* s1, const char_type*, std::size_t) { return s1; }
static constexpr char_type* copy(char_type* s1, const char_type*, std::size_t) { return s1; }
static constexpr char_type* assign(char_type* s, std::size_t, char_type) { return s; }
static constexpr char_type* move(char_type* dest, const char_type* src, std::size_t n)
{
const auto temp = dest;
while (n--)
*(dest++) = *(src++);
return temp;
}
static constexpr char_type* copy(char_type* dest, const char_type* src, std::size_t n)
{
const auto temp = dest;
while (n--)
*(dest++) = *(src++);
return temp;
}
static constexpr char_type* assign(char_type* dest, std::size_t n, char_type ch)
{
const auto temp = dest;
while (n--)
*(dest++) = ch;
return temp;
}
};
#else
using cxper_char_traits = std::char_traits<char>;
@ -146,7 +169,6 @@ testConstantEvaluation()
a.compare(0, 1, "a");
a.compare(0, 1, "a", 1);
// substr
a.substr(0);
// subview
@ -329,7 +351,11 @@ testConstantEvaluation()
a.compare(0, 1, "a", 1);
// substr
// in gcc 5, a constexpr non-static member function returning the class
// is a member of causes an ICE
#ifndef BOOST_STATIC_STRING_GCC5_BAD_CONSTEXPR
a.substr(0);
#endif
// subview
a.subview(0);
@ -497,7 +523,11 @@ testConstantEvaluation()
a.compare(0, 1, "a", 1);
// substr
a.substr(0);
// in gcc 5, a constexpr non-static member function returning the class
// is a member of causes an ICE
#ifndef BOOST_STATIC_STRING_GCC5_BAD_CONSTEXPR
a.substr(0, 1);
#endif
// subview
a.subview(0);