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ircd: Complete linkage requirements for lex_cast template.

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This commit is contained in:
Jason Volk 2017-03-24 14:54:53 -07:00
parent a366731a4b
commit ad47435876
1 changed files with 133 additions and 0 deletions
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133
include/ircd/lexical.h
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@ -31,6 +31,9 @@ namespace ircd {
IRCD_EXCEPTION(ircd::error, bad_lex_cast)
template<class T> bool try_lex_cast(const string_view &);
template<> bool try_lex_cast<std::string>(const string_view &); // stub always true
template<> bool try_lex_cast<std::string_view>(const string_view &); // stub always true
template<> bool try_lex_cast<string_view>(const string_view &); // stub always true
template<> bool try_lex_cast<long double>(const string_view &);
template<> bool try_lex_cast<double>(const string_view &);
template<> bool try_lex_cast<ulong>(const string_view &);
@ -43,7 +46,15 @@ template<> bool try_lex_cast<uint8_t>(const string_view &);
template<> bool try_lex_cast<int8_t>(const string_view &);
template<> bool try_lex_cast<bool>(const string_view &);
template<class T> T lex_cast(std::string &);
template<class T> T lex_cast(const std::string &);
template<class T> T lex_cast(const std::string_view &);
template<class T> T lex_cast(const string_view &);
template<> std::string &lex_cast(std::string &); // trivial
template<> std::string lex_cast(const std::string &); // trivial
template<> std::string_view lex_cast(const std::string_view &); // trivial
template<> std::string lex_cast(const string_view &); // trivial
template<> string_view lex_cast(const string_view &); // trivial
template<> long double lex_cast(const string_view &);
template<> double lex_cast(const string_view &);
template<> ulong lex_cast(const string_view &);
@ -58,6 +69,9 @@ template<> bool lex_cast(const string_view &);
// User supplied destination buffer
template<class T> string_view lex_cast(T, char *const &buf, const size_t &max);
template<> string_view lex_cast(const std::string &, char *const &buf, const size_t &max);
template<> string_view lex_cast(const std::string_view &, char *const &buf, const size_t &max);
template<> string_view lex_cast(const string_view &, char *const &buf, const size_t &max);
template<> string_view lex_cast(long double, char *const &buf, const size_t &max);
template<> string_view lex_cast(double, char *const &buf, const size_t &max);
template<> string_view lex_cast(ulong, char *const &buf, const size_t &max);
@ -539,3 +553,122 @@ ircd::lex_cast(const T &t)
{
return lex_cast<T>(t, nullptr, 0);
}
template<>
inline std::string
ircd::lex_cast<std::string>(const string_view &s)
{
return std::string{s};
}
template<class T>
T
ircd::lex_cast(const string_view &s)
{
return s;
}
template<>
inline std::string_view
ircd::lex_cast<std::string_view>(const std::string_view &s)
{
return s;
}
template<>
__attribute__((warning("unnecessary lexical cast")))
inline std::string
ircd::lex_cast<std::string>(const std::string &s)
{
return s;
}
template<class T>
T
ircd::lex_cast(const std::string &s)
{
return lex_cast<T>(string_view{s});
}
template<>
inline std::string &
ircd::lex_cast(std::string &s)
{
return s;
}
template<class T>
T
ircd::lex_cast(std::string &s)
{
return lex_cast<T>(string_view{s});
}
template<>
inline ircd::string_view
ircd::lex_cast(const string_view &s,
char *const &buf,
const size_t &max)
{
s.copy(buf, max);
return { buf, max };
}
template<>
inline ircd::string_view
ircd::lex_cast(const std::string_view &s,
char *const &buf,
const size_t &max)
{
s.copy(buf, max);
return { buf, max };
}
template<>
inline ircd::string_view
ircd::lex_cast(const std::string &s,
char *const &buf,
const size_t &max)
{
s.copy(buf, max);
return { buf, max };
}
template<class T>
__attribute__((error("unsupported lexical cast")))
ircd::string_view
ircd::lex_cast(T t,
char *const &buf,
const size_t &max)
{
assert(0);
}
template<>
inline bool
ircd::try_lex_cast<ircd::string_view>(const string_view &)
{
return true;
}
template<>
inline bool
ircd::try_lex_cast<std::string_view>(const string_view &)
{
return true;
}
template<>
inline bool
ircd::try_lex_cast<std::string>(const string_view &s)
{
return true;
}
template<class T>
__attribute__((error("unsupported lexical cast")))
bool
ircd::try_lex_cast(const string_view &s)
{
assert(0);
}