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// This file is a part of toml++ and is subject to the the terms of the MIT license.
// Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
// See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
// This example shows the error messages the library produces by forcing a set of specific parsing
// failures and printing their results.
#include "examples.h"
#include <toml++/toml.h>
using namespace std::string_view_literals;
namespace
{
inline constexpr auto invalid_parses = std::array{
"########## comments and whitespace"sv,
"# bar\rkek"sv,
"# bar\bkek"sv,
"# \xf1\x63"sv,
"# val1 = 1\fval2 = 2"sv,
"foo = 1\n\u2000\nbar = 2"sv,
"########## inline tables"sv,
"val = {,}"sv,
"val = {a='b',}"sv, // allowed when TOML_ENABLE_UNRELEASED_FEATURES == 1
"val = {a='b',,}"sv,
"val = {a='b',"sv,
"val = {a='b',\n c='d'}"sv, // allowed when TOML_ENABLE_UNRELEASED_FEATURES == 1
"val = {?='b'}"sv,
"foo = {} \n [foo.bar]"sv,
"########## tables"sv,
"[]"sv,
"[foo"sv,
"[foo] ?"sv,
"[foo] [bar]"sv,
"[foo]\n[foo]"sv,
"? = 'foo' ?"sv,
"[ [foo] ]"sv,
"########## arrays"sv,
"val = [,]"sv,
"val = ['a',,]"sv,
"val = ['a',"sv,
"########## key-value pairs"sv,
"val = 'foo' ?"sv,
"val = "sv,
"val "sv,
"val ?"sv,
"val = ]"sv,
"[foo]\nbar = 'kek'\nbar = 'kek2'"sv,
"[foo]\nbar = 'kek'\nbar = 7"sv,
"[foo.bar]\n[foo]\nbar = 'kek'"sv,
"[foo]\nbar = 'kek'\nbar.kek = 7"sv,
"[foo]\nbar.? = 'kek'"sv,
R"('''val''' = 1)"sv,
R"(a."""val""" = 1)"sv,
"1= 0x6cA#+\xf1"sv,
R"(😂 = 3)"sv, // allowed when TOML_ENABLE_UNRELEASED_FEATURES == 1
"########## values"sv,
"val = _"sv,
"val = G"sv,
"PATHOLOGICALLY_NESTED"sv, // generated inline
"########## strings"sv,
"val = \" \r \""sv,
R"(val = ")"sv,
R"(val = "\g")"sv,
R"(val = "\x20")"sv, // allowed when TOML_ENABLE_UNRELEASED_FEATURES == 1
R"(val = "\uFFF")"sv,
R"(val = "\uFFFG")"sv,
R"(val = "\UFFFFFFF")"sv,
R"(val = "\UFFFFFGF")"sv,
R"(val = "\uD801")"sv,
R"(val = "\U00110000")"sv,
R"(val = """ """""")"sv,
R"(val = ''' '''''')"sv,
"val = '\n'"sv,
"########## integers"sv,
R"(val = -0b0)"sv,
R"(val = -0o0)"sv,
R"(val = -0x0)"sv,
R"(val = +0b0)"sv,
R"(val = +0o0)"sv,
R"(val = +0x0)"sv,
R"(val = 1-)"sv,
R"(val = -1+)"sv,
R"(val = -+1)"sv,
R"(val = 1_0_)"sv,
R"(val = 1_0_ )"sv,
R"(val = 01 )"sv,
R"(val = 0b10000000_00000000_00000000_00000000_00000000_00000000_00000000_00000000 )"sv,
R"(val = 0o1000000000000000000000 )"sv,
R"(val = 9223372036854775808 )"sv,
R"(val = 0x8000000000000000 )"sv,
"########## floats"sv,
R"(val = 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0)"sv,
};
inline constexpr auto divider =
"################################################################################"sv;
}
int main()
{
const auto parse_and_print_if_error = [](std::string_view str)
{
#if TOML_EXCEPTIONS
try
{
auto result = toml::parse(str);
static_cast<void>(result);
}
catch (const toml::parse_error& err)
{
std::cout << err << "\n\n"sv;
}
#else
if (auto result = toml::parse(str); !result)
std::cout << result.error() << "\n\n"sv;
#endif
};
for (auto str : invalid_parses)
{
if (str.empty())
continue;
// section headings
if (str.substr(0, 10) == "##########"sv)
{
std::cout << divider << '\n';
std::cout << "# "sv << str.substr(11) << '\n';
std::cout << divider << "\n\n"sv;
}
// error messages
else
{
toml::parse_result result;
if (str == "PATHOLOGICALLY_NESTED"sv)
{
std::string s(1000u, '[');
constexpr auto start = "array = "sv;
memcpy(s.data(), start.data(), start.length());
parse_and_print_if_error(s);
}
else
parse_and_print_if_error(str);
}
}
return 0;
}
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