mirror of
https://github.com/ToruNiina/toml11.git
synced 2024-11-22 12:30:04 +00:00
87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
// Copyright Toru Niina 2019.
|
|
// Distributed under the MIT License.
|
|
#ifndef TOML11_LITERAL_HPP
|
|
#define TOML11_LITERAL_HPP
|
|
#include "parser.hpp"
|
|
|
|
namespace toml
|
|
{
|
|
inline namespace literals
|
|
{
|
|
inline namespace toml_literals
|
|
{
|
|
|
|
inline ::toml::value operator"" _toml(const char* str, std::size_t len)
|
|
{
|
|
::toml::detail::location
|
|
loc(/* filename = */ std::string("TOML literal encoded in a C++ code"),
|
|
/* contents = */ std::vector<char>(str, str + len));
|
|
|
|
// if there are some comments or empty lines, skip them.
|
|
using skip_line = ::toml::detail::repeat<toml::detail::sequence<
|
|
::toml::detail::maybe<::toml::detail::lex_ws>,
|
|
::toml::detail::maybe<::toml::detail::lex_comment>,
|
|
::toml::detail::lex_newline
|
|
>, ::toml::detail::at_least<1>>;
|
|
skip_line::invoke(loc);
|
|
|
|
// if there are some whitespaces before a value, skip them.
|
|
using skip_ws = ::toml::detail::repeat<
|
|
::toml::detail::lex_ws, ::toml::detail::at_least<1>>;
|
|
skip_ws::invoke(loc);
|
|
|
|
// to distinguish arrays and tables, first check it is a table or not.
|
|
//
|
|
// "[1,2,3]"_toml; // this is an array
|
|
// "[table]"_toml; // a table that has an empty table named "table" inside.
|
|
// "[[1,2,3]]"_toml; // this is an array of arrays
|
|
// "[[table]]"_toml; // this is a table that has an array of tables inside.
|
|
//
|
|
// "[[1]]"_toml; // this can be both... (currently it becomes a table)
|
|
// "1 = [{}]"_toml; // this is a table that has an array of table named 1.
|
|
// "[[1,]]"_toml; // this is an array of arrays.
|
|
// "[[1],]"_toml; // this also.
|
|
|
|
const auto the_front = loc.iter();
|
|
|
|
const bool is_table_key = ::toml::detail::lex_std_table::invoke(loc);
|
|
loc.reset(the_front);
|
|
|
|
const bool is_aots_key = ::toml::detail::lex_array_table::invoke(loc);
|
|
loc.reset(the_front);
|
|
|
|
// If it is neither a table-key or a array-of-table-key, it may be a value.
|
|
if(!is_table_key && !is_aots_key)
|
|
{
|
|
if(auto data = ::toml::detail::parse_value<::toml::value>(loc))
|
|
{
|
|
return data.unwrap();
|
|
}
|
|
}
|
|
|
|
// Note that still it can be a table, because the literal might be something
|
|
// like the following.
|
|
// ```cpp
|
|
// R"( // c++11 raw string literals
|
|
// key = "value"
|
|
// int = 42
|
|
// )"_toml;
|
|
// ```
|
|
// It is a valid toml file.
|
|
// It should be parsed as if we parse a file with this content.
|
|
|
|
if(auto data = ::toml::detail::parse_toml_file<::toml::value>(loc))
|
|
{
|
|
return data.unwrap();
|
|
}
|
|
else // none of them.
|
|
{
|
|
throw ::toml::syntax_error(data.unwrap_err(), source_location(loc));
|
|
}
|
|
}
|
|
|
|
} // toml_literals
|
|
} // literals
|
|
} // toml
|
|
#endif//TOML11_LITERAL_HPP
|