mirror of
https://github.com/ToruNiina/toml11.git
synced 2024-11-27 23:00:08 +00:00
commit
072dccd05d
@ -9,7 +9,10 @@
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#include <type_traits>
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#include <iterator>
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#include <limits>
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#include <array>
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#include <iomanip>
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#include <cstdio>
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#include <cassert>
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#include <cctype>
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// they scans characters and returns region if it matches to the condition.
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@ -38,10 +41,12 @@ inline std::string show_char(const char c)
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}
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else
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{
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std::ostringstream oss;
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oss << "0x" << std::hex << std::setfill('0') << std::setw(2)
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<< static_cast<int>(c);
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return oss.str();
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std::array<char, 5> buf;
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buf.fill('\0');
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const auto r = std::snprintf(
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buf.data(), buf.size(), "0x%02x", static_cast<int>(c) & 0xFF);
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assert(r == buf.size() - 1);
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return std::string(buf.data());
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}
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}
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@ -51,7 +56,8 @@ struct character
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static constexpr char target = C;
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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@ -62,8 +68,12 @@ struct character
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const char c = *(loc.iter());
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if(c != target)
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{
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return err(concat_to_string("expected '", show_char(target),
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"' but got '", show_char(c), "'."));
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if(msg)
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{
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return err(concat_to_string("expected '", show_char(target),
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"' but got '", show_char(c), "'."));
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}
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return err("");
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}
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loc.advance(); // update location
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@ -86,7 +96,8 @@ struct in_range
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static constexpr char lower = Low;
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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@ -97,9 +108,13 @@ struct in_range
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const char c = *(loc.iter());
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if(c < lower || upper < c)
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{
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return err(concat_to_string("expected character in range "
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"[", show_char(lower), ", ", show_char(upper), "] but got ",
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"'", show_char(c), "'."));
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if(msg)
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{
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return err(concat_to_string("expected character in range "
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"[", show_char(lower), ", ", show_char(upper), "] but got ",
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"'", show_char(c), "'."));
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}
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return err("");
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}
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loc.advance();
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@ -120,7 +135,8 @@ template<typename Combinator>
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struct exclude
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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@ -128,13 +144,16 @@ struct exclude
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if(loc.iter() == loc.end()) {return err("not sufficient characters");}
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auto first = loc.iter();
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auto rslt = Combinator::invoke(loc);
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auto rslt = Combinator::invoke(loc, msg);
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if(rslt.is_ok())
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{
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loc.reset(first);
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return err(concat_to_string(
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"invalid pattern (", Combinator::pattern(), ") appeared ",
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rslt.unwrap().str()));
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if(msg)
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{
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return err(concat_to_string("invalid pattern (",
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Combinator::pattern(), ") appeared ", rslt.unwrap().str()));
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}
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return err("");
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}
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loc.reset(std::next(first)); // XXX maybe loc.advance() is okay but...
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return ok(region<Cont>(loc, first, loc.iter()));
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@ -151,12 +170,13 @@ template<typename Combinator>
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struct maybe
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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const auto rslt = Combinator::invoke(loc);
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const auto rslt = Combinator::invoke(loc, msg);
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if(rslt.is_ok())
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{
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return rslt;
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@ -177,34 +197,36 @@ template<typename Head, typename ... Tail>
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struct sequence<Head, Tail...>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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const auto first = loc.iter();
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const auto rslt = Head::invoke(loc);
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const auto rslt = Head::invoke(loc, msg);
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if(rslt.is_err())
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{
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loc.reset(first);
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return err(rslt.unwrap_err());
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}
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return sequence<Tail...>::invoke(loc, std::move(rslt.unwrap()), first);
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return sequence<Tail...>::invoke(loc, std::move(rslt.unwrap()), first, msg);
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}
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// called from the above function only, recursively.
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template<typename Cont, typename Iterator>
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, region<Cont> reg, Iterator first)
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invoke(location<Cont>& loc, region<Cont> reg, Iterator first,
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const bool msg = false)
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{
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const auto rslt = Head::invoke(loc);
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const auto rslt = Head::invoke(loc, msg);
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if(rslt.is_err())
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{
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loc.reset(first);
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return err(rslt.unwrap_err());
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}
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reg += rslt.unwrap(); // concat regions
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return sequence<Tail...>::invoke(loc, std::move(reg), first);
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return sequence<Tail...>::invoke(loc, std::move(reg), first, msg);
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}
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static std::string pattern()
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@ -219,9 +241,10 @@ struct sequence<Head>
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// would be called from sequence<T ...>::invoke only.
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template<typename Cont, typename Iterator>
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, region<Cont> reg, Iterator first)
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invoke(location<Cont>& loc, region<Cont> reg, Iterator first,
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const bool msg = false)
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{
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const auto rslt = Head::invoke(loc);
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const auto rslt = Head::invoke(loc, msg);
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if(rslt.is_err())
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{
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loc.reset(first);
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@ -240,14 +263,15 @@ template<typename Head, typename ... Tail>
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struct either<Head, Tail...>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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const auto rslt = Head::invoke(loc);
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const auto rslt = Head::invoke(loc, msg);
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if(rslt.is_ok()) {return rslt;}
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return either<Tail...>::invoke(loc);
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return either<Tail...>::invoke(loc, msg);
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}
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static std::string pattern()
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@ -259,11 +283,12 @@ template<typename Head>
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struct either<Head>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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static_assert(std::is_same<char, typename Cont::value_type>::value,
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"internal error: container::value_type should be `char`.");
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return Head::invoke(loc);
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return Head::invoke(loc, msg);
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}
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static std::string pattern()
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{
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@ -282,13 +307,14 @@ template<typename T, std::size_t N>
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struct repeat<T, exactly<N>>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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region<Cont> retval(loc);
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const auto first = loc.iter();
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for(std::size_t i=0; i<N; ++i)
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{
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auto rslt = T::invoke(loc);
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auto rslt = T::invoke(loc, msg);
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if(rslt.is_err())
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{
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loc.reset(first);
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@ -308,14 +334,15 @@ template<typename T, std::size_t N>
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struct repeat<T, at_least<N>>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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region<Cont> retval(loc);
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const auto first = loc.iter();
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for(std::size_t i=0; i<N; ++i)
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{
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auto rslt = T::invoke(loc);
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auto rslt = T::invoke(loc, msg);
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if(rslt.is_err())
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{
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loc.reset(first);
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@ -325,7 +352,7 @@ struct repeat<T, at_least<N>>
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}
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while(true)
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{
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auto rslt = T::invoke(loc);
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auto rslt = T::invoke(loc, msg);
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if(rslt.is_err())
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{
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return ok(std::move(retval));
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@ -343,12 +370,13 @@ template<typename T>
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struct repeat<T, unlimited>
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{
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template<typename Cont>
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static result<region<Cont>, std::string> invoke(location<Cont>& loc)
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static result<region<Cont>, std::string>
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invoke(location<Cont>& loc, const bool msg = false)
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{
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region<Cont> retval(loc);
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while(true)
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{
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auto rslt = T::invoke(loc);
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auto rslt = T::invoke(loc, msg);
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if(rslt.is_err())
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{
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return ok(std::move(retval));
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|
166
toml/parser.hpp
166
toml/parser.hpp
@ -116,10 +116,28 @@ parse_integer(location<Container>& loc)
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const auto first = loc.iter();
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if(first != loc.end() && *first == '0')
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{
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if(const auto bin = parse_binary_integer (loc)) {return bin;}
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if(const auto oct = parse_octal_integer (loc)) {return oct;}
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if(const auto hex = parse_hexadecimal_integer(loc)) {return hex;}
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// else, maybe just zero.
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const auto second = std::next(first);
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if(second == loc.end()) // the token is just zero.
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{
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return ok(std::make_pair(0, region<Container>(loc, first, second)));
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}
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if(*second == 'b') {return parse_binary_integer (loc);} // 0b1100
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if(*second == 'o') {return parse_octal_integer (loc);} // 0o775
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if(*second == 'x') {return parse_hexadecimal_integer(loc);} // 0xC0FFEE
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if(std::isdigit(*second))
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{
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return err(format_underline("[error] toml::parse_integer: "
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"leading zero in an Integer is not allowed.",
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{{std::addressof(loc), "leading zero"}}));
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}
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else if(std::isalpha(*second))
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{
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return err(format_underline("[error] toml::parse_integer: "
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"unknown integer prefix appeared.",
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{{std::addressof(loc), "none of 0x, 0o, 0b"}}));
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}
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}
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if(const auto token = lex_dec_int::invoke(loc))
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@ -308,7 +326,7 @@ result<std::string, std::string> parse_escape_sequence(location<Container>& loc)
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{
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return err(format_underline("[error] parse_escape_sequence: "
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"invalid token found in UTF-8 codepoint uXXXX.",
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{{std::addressof(loc), token.unwrap_err()}}));
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{{std::addressof(loc), "here"}}));
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}
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}
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case 'U':
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@ -321,7 +339,7 @@ result<std::string, std::string> parse_escape_sequence(location<Container>& loc)
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{
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return err(format_underline("[error] parse_escape_sequence: "
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"invalid token found in UTF-8 codepoint Uxxxxxxxx",
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{{std::addressof(loc), token.unwrap_err()}}));
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{{std::addressof(loc), "here"}}));
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}
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}
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}
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@ -388,7 +406,9 @@ parse_ml_basic_string(location<Container>& loc)
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else
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{
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loc.reset(first);
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return err(token.unwrap_err());
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return err(format_underline("[error] toml::parse_ml_basic_string: "
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"the next token is not a multiline string",
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{{std::addressof(loc), "here"}}));
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}
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}
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@ -437,7 +457,9 @@ parse_basic_string(location<Container>& loc)
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else
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{
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loc.reset(first); // rollback
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return err(token.unwrap_err());
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return err(format_underline("[error] toml::parse_basic_string: "
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"the next token is not a string",
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{{std::addressof(loc), "here"}}));
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}
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}
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@ -476,7 +498,9 @@ parse_ml_literal_string(location<Container>& loc)
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else
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{
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loc.reset(first); // rollback
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return err(token.unwrap_err());
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return err(format_underline("[error] toml::parse_ml_literal_string: "
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"the next token is not a multiline literal string",
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{{std::addressof(loc), "here"}}));
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}
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}
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@ -513,7 +537,9 @@ parse_literal_string(location<Container>& loc)
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else
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{
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loc.reset(first); // rollback
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return err(token.unwrap_err());
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return err(format_underline("[error] toml::parse_literal_string: "
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"the next token is not a literal string",
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{{std::addressof(loc), "here"}}));
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}
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}
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@ -521,10 +547,30 @@ template<typename Container>
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result<std::pair<toml::string, region<Container>>, std::string>
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parse_string(location<Container>& loc)
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{
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if(const auto rslt = parse_ml_basic_string(loc)) {return rslt;}
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if(const auto rslt = parse_ml_literal_string(loc)) {return rslt;}
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if(const auto rslt = parse_basic_string(loc)) {return rslt;}
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if(const auto rslt = parse_literal_string(loc)) {return rslt;}
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if(loc.iter() != loc.end() && *(loc.iter()) == '"')
|
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{
|
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if(loc.iter() + 1 != loc.end() && *(loc.iter() + 1) == '"' &&
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loc.iter() + 2 != loc.end() && *(loc.iter() + 2) == '"')
|
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{
|
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return parse_ml_basic_string(loc);
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}
|
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else
|
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{
|
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return parse_basic_string(loc);
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}
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}
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else if(loc.iter() != loc.end() && *(loc.iter()) == '\'')
|
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{
|
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if(loc.iter() + 1 != loc.end() && *(loc.iter() + 1) == '\'' &&
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loc.iter() + 2 != loc.end() && *(loc.iter() + 2) == '\'')
|
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{
|
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return parse_ml_literal_string(loc);
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}
|
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else
|
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{
|
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return parse_literal_string(loc);
|
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}
|
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}
|
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return err(format_underline("[error] toml::parse_string: ",
|
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{{std::addressof(loc), "the next token is not a string"}}));
|
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}
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@ -1374,6 +1420,46 @@ parse_inline_table(location<Container>& loc)
|
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{{std::addressof(loc), "should be closed"}}));
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}
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|
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template<typename Container>
|
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value_t guess_number_type(const location<Container>& l)
|
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{
|
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location<Container> loc = l;
|
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|
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if(lex_offset_date_time::invoke(loc)) {return value_t::OffsetDatetime;}
|
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loc.reset(l.iter());
|
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|
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if(lex_local_date_time::invoke(loc)) {return value_t::LocalDatetime;}
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loc.reset(l.iter());
|
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|
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if(lex_local_date::invoke(loc)) {return value_t::LocalDate;}
|
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loc.reset(l.iter());
|
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|
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if(lex_local_time::invoke(loc)) {return value_t::LocalTime;}
|
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loc.reset(l.iter());
|
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|
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if(lex_float::invoke(loc)) {return value_t::Float;}
|
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loc.reset(l.iter());
|
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|
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return value_t::Integer;
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}
|
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|
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template<typename Container>
|
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value_t guess_value_type(const location<Container>& loc)
|
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{
|
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switch(*loc.iter())
|
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{
|
||||
case '"' : {return value_t::String; }
|
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case '\'': {return value_t::String; }
|
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case 't' : {return value_t::Boolean;}
|
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case 'f' : {return value_t::Boolean;}
|
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case '[' : {return value_t::Array; }
|
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case '{' : {return value_t::Table; }
|
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case 'i' : {return value_t::Float; } // inf.
|
||||
case 'n' : {return value_t::Float; } // nan.
|
||||
default : {return guess_number_type(loc);}
|
||||
}
|
||||
}
|
||||
|
||||
template<typename Container>
|
||||
result<value, std::string> parse_value(location<Container>& loc)
|
||||
{
|
||||
@ -1383,31 +1469,27 @@ result<value, std::string> parse_value(location<Container>& loc)
|
||||
return err(format_underline("[error] toml::parse_value: input is empty",
|
||||
{{std::addressof(loc), ""}}));
|
||||
}
|
||||
if(auto r = parse_string (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_array (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_inline_table (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_boolean (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_offset_datetime(loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_local_datetime (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_local_date (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_local_time (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_floating (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
if(auto r = parse_integer (loc))
|
||||
{return ok(value(std::move(r.unwrap().first), std::move(r.unwrap().second)));}
|
||||
|
||||
const auto msg = format_underline("[error] toml::parse_value: "
|
||||
"unknown token appeared", {{std::addressof(loc), "unknown"}});
|
||||
loc.reset(first);
|
||||
return err(msg);
|
||||
switch(guess_value_type(loc))
|
||||
{
|
||||
case value_t::Boolean : {return parse_boolean(loc); }
|
||||
case value_t::Integer : {return parse_integer(loc); }
|
||||
case value_t::Float : {return parse_floating(loc); }
|
||||
case value_t::String : {return parse_string(loc); }
|
||||
case value_t::OffsetDatetime : {return parse_offset_datetime(loc);}
|
||||
case value_t::LocalDatetime : {return parse_local_datetime(loc); }
|
||||
case value_t::LocalDate : {return parse_local_date(loc); }
|
||||
case value_t::LocalTime : {return parse_local_time(loc); }
|
||||
case value_t::Array : {return parse_array(loc); }
|
||||
case value_t::Table : {return parse_inline_table(loc); }
|
||||
default:
|
||||
{
|
||||
const auto msg = format_underline("[error] toml::parse_value: "
|
||||
"unknown token appeared", {{std::addressof(loc), "unknown"}});
|
||||
loc.reset(first);
|
||||
return err(msg);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
template<typename Container>
|
||||
@ -1463,7 +1545,8 @@ parse_table_key(location<Container>& loc)
|
||||
}
|
||||
else
|
||||
{
|
||||
return err(token.unwrap_err());
|
||||
return err(format_underline("[error] toml::parse_table_key: "
|
||||
"not a valid table key", {{std::addressof(loc), "here"}}));
|
||||
}
|
||||
}
|
||||
|
||||
@ -1471,7 +1554,7 @@ template<typename Container>
|
||||
result<std::pair<std::vector<key>, region<Container>>, std::string>
|
||||
parse_array_table_key(location<Container>& loc)
|
||||
{
|
||||
if(auto token = lex_array_table::invoke(loc))
|
||||
if(auto token = lex_array_table::invoke(loc, true))
|
||||
{
|
||||
location<std::string> inner_loc(loc.name(), token.unwrap().str());
|
||||
|
||||
@ -1516,7 +1599,8 @@ parse_array_table_key(location<Container>& loc)
|
||||
}
|
||||
else
|
||||
{
|
||||
return err(token.unwrap_err());
|
||||
return err(format_underline("[error] toml::parse_array_table_key: "
|
||||
"not a valid table key", {{std::addressof(loc), "here"}}));
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -71,7 +71,7 @@ struct location final : public region_base
|
||||
"container should be randomly accessible");
|
||||
|
||||
location(std::string name, Container cont)
|
||||
: source_(std::make_shared<Container>(std::move(cont))), line_number_(0),
|
||||
: source_(std::make_shared<Container>(std::move(cont))), line_number_(1),
|
||||
source_name_(std::move(name)), iter_(source_->cbegin())
|
||||
{}
|
||||
location(const location&) = default;
|
||||
@ -88,7 +88,7 @@ struct location final : public region_base
|
||||
const_iterator begin() const noexcept {return source_->cbegin();}
|
||||
const_iterator end() const noexcept {return source_->cend();}
|
||||
|
||||
// XXX At first, `location::line_num()` is implemented using `std::count` to
|
||||
// XXX `location::line_num()` used to be implemented using `std::count` to
|
||||
// count a number of '\n'. But with a long toml file (typically, 10k lines),
|
||||
// it becomes intolerably slow because each time it generates error messages,
|
||||
// it counts '\n' from thousands of characters. To workaround it, I decided
|
||||
@ -110,8 +110,8 @@ struct location final : public region_base
|
||||
}
|
||||
void reset(const_iterator rollback) noexcept
|
||||
{
|
||||
// since c++11, std::distance works in both ways and returns a negative
|
||||
// value if `first` is ahead from `last`.
|
||||
// since c++11, std::distance works in both ways for random-access
|
||||
// iterators and returns a negative value if `first > last`.
|
||||
if(0 <= std::distance(rollback, this->iter_)) // rollback < iter
|
||||
{
|
||||
this->line_number_ -= std::count(rollback, this->iter_, '\n');
|
||||
|
@ -572,6 +572,14 @@ class value
|
||||
return *this;
|
||||
}
|
||||
|
||||
// for internal use ------------------------------------------------------
|
||||
|
||||
template<typename T, typename Container, typename std::enable_if<
|
||||
detail::is_exact_toml_type<T>::value, std::nullptr_t>::type = nullptr>
|
||||
value(std::pair<T, detail::region<Container>> parse_result)
|
||||
: value(std::move(parse_result.first), std::move(parse_result.second))
|
||||
{}
|
||||
|
||||
// type checking and casting ============================================
|
||||
|
||||
template<typename T>
|
||||
|
Loading…
Reference in New Issue
Block a user