tests executable of toml11 library
toml11 is a C++11 (or later) header-only toml parser/encoder depending only on C++ standard library.
- It is compatible to the latest version of TOML v1.0.0.
- It is one of the most TOML standard compliant libraries, tested with the language agnostic test suite for TOML parsers by BurntSushi.
- It shows highly informative error messages. You can see the error messages about invalid files at CircleCI.
- It has configurable container. You can use any random-access containers and key-value maps as backend containers.
- It optionally preserves comments without any overhead.
- It has configurable serializer that supports comments, inline tables, literal strings and multiline strings.
- It supports user-defined type conversion from/into toml values.
- It correctly handles UTF-8 sequences, with or without BOM, both on posix and Windows.
Example
#include <toml.hpp>
#include <iostream>
int main()
{
// ```toml
// title = "an example toml file"
// nums = [3, 1, 4, 1, 5]
// ```
auto data = toml::parse("example.toml");
// find a value with the specified type from a table
std::string title = toml::find<std::string>(data, "title");
// convert the whole array into any container automatically
std::vector<int> nums = toml::find<std::vector<int>>(data, "nums");
// access with STL-like manner
if(!data.contains("foo"))
{
data["foo"] = "bar";
}
// pass a fallback
std::string name = toml::find_or<std::string>(data, "name", "not found");
// width-dependent formatting
std::cout << std::setw(80) << data << std::endl;
return 0;
}
Table of Contents
- Integration
- Decoding a toml file
- Finding a toml value
- Casting a toml value
- Checking value type
- More about conversion
- Getting with a fallback
- Expecting conversion
- Visiting a toml::value
- Constructing a toml::value
- Preserving Comments
- Customizing containers
- TOML literal
- Conversion between toml value and arbitrary types
- Formatting user-defined error messages
- Obtaining location information
- Exceptions
- Colorize Error Messages
- Serializing TOML data
- Underlying types
- Unreleased TOML features
- Breaking Changes from v2
- Running Tests
- Contributors
- Licensing Terms
Integration
Just include the file after adding it to the include path.
#include <toml.hpp> // that's all! now you can use it.
#include <iostream>
int main()
{
const auto data = toml::parse("example.toml");
const auto title = toml::find<std::string>(data, "title");
std::cout << "the title is " << title << std::endl;
return 0;
}
The convenient way is to add this repository as a git-submodule or to install it in your system by CMake.
Note for MSVC: We recommend to set /Zc:__cplusplus
to detect C++ version correctly.
Decoding a toml file
To parse a toml file, the only thing you have to do is
to pass a filename to the toml::parse
function.
const std::string fname("sample.toml");
const toml::value data = toml::parse(fname);
As required by the TOML specification, the top-level value is always a table.
You can find a value inside it, cast it into a table explicitly, and insert it as a value into other toml::value
.
If it encounters an error while opening a file, it will throw std::runtime_error
.
You can also pass a std::istream
to the toml::parse
function.
To show a filename in an error message, however, it is recommended to pass the
filename with the stream.
std::ifstream ifs("sample.toml", std::ios_base::binary);
assert(ifs.good());
const auto data = toml::parse(ifs, /*optional -> */ "sample.toml");
Note: When you are on Windows, open a file in binary mode. If a file is opened in text-mode, CRLF ("\r\n") will automatically be converted to LF ("\n") and this causes inconsistency between file size and the contents that would be read. This causes weird error.
In the case of syntax error
If there is a syntax error in a toml file, toml::parse
will throw
toml::syntax_error
that inherits std::exception
.
toml11 has clean and informative error messages inspired by Rust and it looks like the following.
terminate called after throwing an instance of 'toml::syntax_error'
what(): [error] toml::parse_table: invalid line format # error description
--> example.toml # file name
3 | a = 42 = true # line num and content
| ^------ expected newline, but got '='. # error reason
If you (mistakenly) duplicate tables and got an error, it is helpful to see where they are. toml11 shows both at the same time like the following.
terminate called after throwing an instance of 'toml::syntax_error'
what(): [error] toml::insert_value: table ("table") already exists.
--> duplicate-table.toml
1 | [table]
| ~~~~~~~ table already exists here
...
3 | [table]
| ~~~~~~~ table defined twice
When toml11 encounters a malformed value, it tries to detect what type it is. Then it shows hints to fix the format. An error message while reading one of the malformed files in the language agnostic test suite. is shown below.
what(): [error] bad time: should be HH:MM:SS.subsec
--> ./datetime-malformed-no-secs.toml
1 | no-secs = 1987-07-05T17:45Z
| ^------- HH:MM:SS.subsec
|
Hint: pass: 1979-05-27T07:32:00, 1979-05-27 07:32:00.999999
Hint: fail: 1979-05-27T7:32:00, 1979-05-27 17:32
You can find other examples in a job named output_result
on
CircleCI.
Since the error message generation is generally a difficult task, the current status is not ideal. If you encounter a weird error message, please let us know and contribute to improve the quality!
Invalid UTF-8 codepoints
It throws syntax_error
if a value of an escape sequence
representing unicode character is not a valid UTF-8 codepoint.
what(): [error] toml::read_utf8_codepoint: input codepoint is too large.
--> utf8.toml
1 | exceeds_unicode = "\U0011FFFF example"
| ^--------- should be in [0x00..0x10FFFF]
Finding a toml value
After parsing successfully, you can obtain the values from the result of
toml::parse
using toml::find
function.
# sample.toml
answer = 42
pi = 3.14
numbers = [1,2,3]
time = 1979-05-27T07:32:00Z
const auto data = toml::parse("sample.toml");
const auto answer = toml::find<std::int64_t >(data, "answer");
const auto pi = toml::find<double >(data, "pi");
const auto numbers = toml::find<std::vector<int>>(data, "numbers");
const auto timepoint = toml::find<std::chrono::system_clock::time_point>(data, "time");
By default, toml::find
returns a toml::value
.
const toml::value& answer = toml::find(data, "answer");
When you pass an exact TOML type that does not require type conversion,
toml::find
returns a reference without copying the value.
const auto data = toml::parse("sample.toml");
const auto& answer = toml::find<toml::integer>(data, "answer");
If the specified type requires conversion, you can't take a reference to the value. See also underlying types.
NOTE: For some technical reason, automatic conversion between integer
and
floating
is not supported. If you want to get a floating value even if a value
has integer value, you need to convert it manually after obtaining a value,
like the following.
const auto vx = toml::find(data, "x");
double x = vx.is_floating() ? vx.as_floating(std::nothrow) :
static_cast<double>(vx.as_integer()); // it throws if vx is neither
// floating nor integer.
Finding a value in a table
There are several way to get a value defined in a table. First, you can get a table as a normal value and find a value from the table.
[fruit]
name = "apple"
[fruit.physical]
color = "red"
shape = "round"
const auto data = toml::parse("fruit.toml");
const auto& fruit = toml::find(data, "fruit");
const auto name = toml::find<std::string>(fruit, "name");
const auto& physical = toml::find(fruit, "physical");
const auto color = toml::find<std::string>(physical, "color");
const auto shape = toml::find<std::string>(physical, "shape");
Here, variable fruit
is a toml::value
and can be used as the first argument
of toml::find
.
Second, you can pass as many arguments as the number of subtables to toml::find
.
const auto data = toml::parse("fruit.toml");
const auto color = toml::find<std::string>(data, "fruit", "physical", "color");
const auto shape = toml::find<std::string>(data, "fruit", "physical", "shape");
Finding a value in an array
You can find n-th value in an array by toml::find
.
values = ["foo", "bar", "baz"]
const auto data = toml::parse("sample.toml");
const auto values = toml::find(data, "values");
const auto bar = toml::find<std::string>(values, 1);
toml::find
can also search array recursively.
const auto data = toml::parse("fruit.toml");
const auto bar = toml::find<std::string>(data, "values", 1);
Before calling toml::find
, you can check if a value corresponding to a key
exists. You can use both bool toml::value::contains(const key&) const
and
std::size_t toml::value::count(const key&) const
. Those behaves like the
std::map::contains
and std::map::count
.
const auto data = toml::parse("fruit.toml");
if(data.contains("fruit") && data.at("fruit").count("physical") != 0)
{
// ...
}
In case of error
If the value does not exist, toml::find
throws std::out_of_range
with the
location of the table.
terminate called after throwing an instance of 'std::out_of_range'
what(): [error] key "answer" not found
--> example.toml
6 | [tab]
| ~~~~~ in this table
If the specified type differs from the actual value contained, it throws
toml::type_error
that inherits std::exception
.
Similar to the case of syntax error, toml11 also displays clean error messages.
The error message when you choose int
to get string
value would be like this.
terminate called after throwing an instance of 'toml::type_error'
what(): [error] toml::value bad_cast to integer
--> example.toml
3 | title = "TOML Example"
| ~~~~~~~~~~~~~~ the actual type is string
NOTE: In order to show this kind of error message, all the toml values have
a pointer to represent its range in a file. The entire contents of a file is
shared by toml::value
s and remains on the heap memory. It is recommended to
destruct all the toml::value
classes after configuring your application
if you have a large TOML file compared to the memory resource.
Dotted keys
TOML v0.5.0 has a new feature named "dotted keys". You can chain keys to represent the structure of the data.
physical.color = "orange"
physical.shape = "round"
This is equivalent to the following.
[physical]
color = "orange"
shape = "round"
You can get both of the above tables with the same c++ code.
const auto physical = toml::find(data, "physical");
const auto color = toml::find<std::string>(physical, "color");
The following code does not work for the above toml file.
// XXX this does not work!
const auto color = toml::find<std::string>(data, "physical.color");
The above code works with the following toml file.
"physical.color" = "orange"
# equivalent to {"physical.color": "orange"},
# NOT {"physical": {"color": "orange"}}.
Casting a toml value
toml::get
toml::parse
returns toml::value
. toml::value
is a union type that can
contain one of the following types.
toml::boolean
(bool
)toml::integer
(std::int64_t
)toml::floating
(double
)toml::string
(a type convertible to std::string)toml::local_date
toml::local_time
toml::local_datetime
toml::offset_datetime
toml::array
(by default,std::vector<toml::value>
)- It depends. See customizing containers for detail.
toml::table
(by default,std::unordered_map<toml::key, toml::value>
)- It depends. See customizing containers for detail.
To get a value inside, you can use toml::get<T>()
. The usage is the same as
toml::find<T>
(actually, toml::find
internally uses toml::get
after casting
a value to toml::table
).
const toml::value data = toml::parse("sample.toml");
const toml::value answer_ = toml::get<toml::table >(data).at("answer");
const std::int64_t answer = toml::get<std::int64_t>(answer_);
When you pass an exact TOML type that does not require type conversion,
toml::get
returns a reference through which you can modify the content
(if the toml::value
is const
, it returns const
reference).
toml::value data = toml::parse("sample.toml");
toml::value answer_ = toml::get<toml::table >(data).at("answer");
toml::integer& answer = toml::get<toml::integer>(answer_);
answer = 6 * 9; // write to data.answer. now `answer_` contains 54.
If the specified type requires conversion, you can't take a reference to the value. See also underlying types.
It also throws a toml::type_error
if the type differs.
as_xxx
You can also use a member function to cast a value.
const std::int64_t answer = data.as_table().at("answer").as_integer();
It also throws a toml::type_error
if the type differs. If you are sure that
the value v
contains a value of the specified type, you can suppress checking
by passing std::nothrow
.
const auto& answer = data.as_table().at("answer");
if(answer.is_integer() && answer.as_integer(std::nothrow) == 42)
{
std::cout << "value is 42" << std::endl;
}
If std::nothrow
is passed, the functions are marked as noexcept.
By casting a toml::value
into an array or a table, you can iterate over the
elements.
const auto data = toml::parse("example.toml");
std::cout << "keys in the top-level table are the following: \n";
for(const auto& [k, v] : data.as_table())
{
std::cout << k << '\n';
}
const auto& fruits = toml::find(data, "fruits");
for(const auto& v : fruits.as_array())
{
std::cout << toml::find<std::string>(v, "name") << '\n';
}
The full list of the functions is below.
namespace toml {
class value {
// ...
const boolean& as_boolean() const&;
const integer& as_integer() const&;
const floating& as_floating() const&;
const string& as_string() const&;
const offset_datetime& as_offset_datetime() const&;
const local_datetime& as_local_datetime() const&;
const local_date& as_local_date() const&;
const local_time& as_local_time() const&;
const array& as_array() const&;
const table& as_table() const&;
// --------------------------------------------------------
// non-const version
boolean& as_boolean() &;
// ditto...
// --------------------------------------------------------
// rvalue version
boolean&& as_boolean() &&;
// ditto...
// --------------------------------------------------------
// noexcept versions ...
const boolean& as_boolean(const std::nothrow_t&) const& noexcept;
boolean& as_boolean(const std::nothrow_t&) & noexcept;
boolean&& as_boolean(const std::nothrow_t&) && noexcept;
// ditto...
};
} // toml
at()
You can access to the element of a table and an array by toml::basic_value::at
.
const toml::value v{1,2,3,4,5};
std::cout << v.at(2).as_integer() << std::endl; // 3
const toml::value v{{"foo", 42}, {"bar", 3.14}};
std::cout << v.at("foo").as_integer() << std::endl; // 42
If an invalid key (integer for a table, string for an array), it throws
toml::type_error
for the conversion. If the provided key is out-of-range,
it throws std::out_of_range
.
Note that, although std::string
has at()
member function, toml::value::at
throws if the contained type is a string. Because std::string
does not
contain toml::value
.
operator[]
You can also access to the element of a table and an array by
toml::basic_value::operator[]
.
const toml::value v{1,2,3,4,5};
std::cout << v[2].as_integer() << std::endl; // 3
const toml::value v{{"foo", 42}, {"bar", 3.14}};
std::cout << v["foo"].as_integer() << std::endl; // 42
When you access to a toml::value
that is not initialized yet via
operator[](const std::string&)
, the toml::value
will be a table,
just like the std::map
.
toml::value v; // not initialized as a table.
v["foo"] = 42; // OK. `v` will be a table.
Contrary, if you access to a toml::value
that contains an array via operator[]
,
it does not check anything. It converts toml::value
without type check and then
access to the n-th element without boundary check, just like the std::vector::operator[]
.
toml::value v; // not initialized as an array
v[2] = 42; // error! UB
Please make sure that the toml::value
has an array inside when you access to
its element via operator[]
.
Checking value type
You can check the type of a value by is_xxx
function.
const toml::value v = /* ... */;
if(v.is_integer())
{
std::cout << "value is an integer" << std::endl;
}
The complete list of the functions is below.
namespace toml {
class value {
// ...
bool is_boolean() const noexcept;
bool is_integer() const noexcept;
bool is_floating() const noexcept;
bool is_string() const noexcept;
bool is_offset_datetime() const noexcept;
bool is_local_datetime() const noexcept;
bool is_local_date() const noexcept;
bool is_local_time() const noexcept;
bool is_array() const noexcept;
bool is_table() const noexcept;
bool is_uninitialized() const noexcept;
// ...
};
} // toml
Also, you can get enum class value_t
from toml::value::type()
.
switch(data.at("something").type())
{
case toml::value_t::integer: /*do some stuff*/ ; break;
case toml::value_t::floating: /*do some stuff*/ ; break;
case toml::value_t::string : /*do some stuff*/ ; break;
default : throw std::runtime_error(
"unexpected type : " + toml::stringize(data.at("something").type()));
}
The complete list of the enum
s can be found in the section
underlying types.
The enum
s can be used as a parameter of toml::value::is
function like the following.
toml::value v = /* ... */;
if(v.is(toml::value_t::boolean)) // ...
More about conversion
Since toml::find
internally uses toml::get
, all the following examples work
with both toml::get
and toml::find
.
Converting an array
You can get any kind of container
class from a toml::array
except for map
-like classes.
// # sample.toml
// numbers = [1,2,3]
const auto numbers = toml::find(data, "numbers");
const auto vc = toml::get<std::vector<int> >(numbers);
const auto ls = toml::get<std::list<int> >(numbers);
const auto dq = toml::get<std::deque<int> >(numbers);
const auto ar = toml::get<std::array<int, 3>>(numbers);
// if the size of data.at("numbers") is larger than that of std::array,
// it will throw toml::type_error because std::array is not resizable.
Surprisingly, you can convert toml::array
into std::pair
and std::tuple
.
// numbers = [1,2,3]
const auto tp = toml::get<std::tuple<short, int, unsigned int>>(numbers);
This functionality is helpful when you have a toml file like the following.
array_of_arrays = [[1, 2, 3], ["foo", "bar", "baz"]] # toml allows this
What is the corresponding C++ type?
Obviously, it is a std::pair
of std::vector
s.
const auto array_of_arrays = toml::find(data, "array_of_arrays");
const auto aofa = toml::get<
std::pair<std::vector<int>, std::vector<std::string>>
>(array_of_arrays);
If you don't know the type of the elements, you can use toml::array
,
which is a std::vector
of toml::value
, instead.
const auto a_of_a = toml::get<toml::array>(array_of_arrays);
const auto first = toml::get<std::vector<int>>(a_of_a.at(0));
You can change the implementation of toml::array
with std::deque
or some
other array-like container. See Customizing containers
for detail.
Converting a table
When all the values of the table have the same type, toml11 allows you to
convert a toml::table
to a map
that contains the convertible type.
[tab]
key1 = "foo" # all the values are
key2 = "bar" # toml String
const auto data = toml::parse("sample.toml");
const auto tab = toml::find<std::map<std::string, std::string>>(data, "tab");
std::cout << tab["key1"] << std::endl; // foo
std::cout << tab["key2"] << std::endl; // bar
But since toml::table
is just an alias of std::unordered_map<toml::key, toml::value>
,
normally you don't need to convert it because it has all the functionalities that
std::unordered_map
has (e.g. operator[]
, count
, and find
). In most cases
toml::table
is sufficient.
toml::table tab = toml::get<toml::table>(data);
if(data.count("title") != 0)
{
data["title"] = std::string("TOML example");
}
You can change the implementation of toml::table
with std::map
or some
other map-like container. See Customizing containers
for detail.
Getting an array of tables
An array of tables is just an array of tables. You can get it in completely the same way as the other arrays and tables.
# sample.toml
array_of_inline_tables = [{key = "value1"}, {key = "value2"}, {key = "value3"}]
[[array_of_tables]]
key = "value4"
[[array_of_tables]]
key = "value5"
[[array_of_tables]]
key = "value6"
const auto data = toml::parse("sample.toml");
const auto aot1 = toml::find<std::vector<toml::table>>(data, "array_of_inline_tables");
const auto aot2 = toml::find<std::vector<toml::table>>(data, "array_of_tables");
Cost of conversion
Although conversion through toml::(get|find)
is convenient, it has additional
copy-cost because it copies data contained in toml::value
to the
user-specified type. Of course in some cases this overhead is not ignorable.
// the following code constructs a std::vector.
// it requires heap allocation for vector and element conversion.
const auto array = toml::find<std::vector<int>>(data, "foo");
By passing the exact types, toml::get
returns reference that has no overhead.
const auto& tab = toml::find<toml::table>(data, "tab");
const auto& numbers = toml::find<toml::array>(data, "numbers");
Also, as_xxx
are zero-overhead because they always return a reference.
const auto& tab = toml::find(data, "tab" ).as_table();
const auto& numbers = toml::find(data, "numbers").as_array();
In this case you need to call toml::get
each time you access to
the element of toml::array
because toml::array
is an array of toml::value
.
const auto& num0 = toml::get<toml::integer>(numbers.at(0));
const auto& num1 = toml::get<toml::integer>(numbers.at(1));
const auto& num2 = toml::get<toml::integer>(numbers.at(2));
Converting datetime and its variants
TOML v0.5.0 has 4 different datetime objects, local_date
, local_time
,
local_datetime
, and offset_datetime
.
Since local_date
, local_datetime
, and offset_datetime
represent a time
point, you can convert them to std::chrono::system_clock::time_point
.
Contrary, local_time
does not represents a time point because they lack a
date information, but it can be converted to std::chrono::duration
that
represents a duration from the beginning of the day, 00:00:00.000
.
# sample.toml
date = 2018-12-23
time = 12:30:00
l_dt = 2018-12-23T12:30:00
o_dt = 2018-12-23T12:30:00+09:30
const auto data = toml::parse("sample.toml");
const auto date = toml::get<std::chrono::system_clock::time_point>(data.at("date"));
const auto l_dt = toml::get<std::chrono::system_clock::time_point>(data.at("l_dt"));
const auto o_dt = toml::get<std::chrono::system_clock::time_point>(data.at("o_dt"));
const auto time = toml::get<std::chrono::minutes>(data.at("time")); // 12 * 60 + 30 min
local_date
and local_datetime
are assumed to be in the local timezone when
they are converted into time_point
. On the other hand, offset_datetime
only
uses the offset part of the data and it does not take local timezone into account.
To contain datetime data, toml11 defines its own datetime types. For more detail, you can see the definitions in toml/datetime.hpp.
Getting with a fallback
toml::find_or
returns a default value if the value is not found or has a
different type.
const auto data = toml::parse("example.toml");
const auto num = toml::find_or(data, "num", 42);
It works recursively if you pass several keys for subtables.
In that case, the last argument is considered to be the optional value.
All other arguments between toml::value
and the optinoal value are considered as keys.
// [fruit.physical]
// color = "red"
auto data = toml::parse("fruit.toml");
auto color = toml::find_or(data, "fruit", "physical", "color", "red");
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^
// arguments optional value
Also, toml::get_or
returns a default value if toml::get<T>
failed.
toml::value v("foo"); // v contains String
const int value = toml::get_or(v, 42); // conversion fails. it returns 42.
These functions automatically deduce what type you want to get from the default value you passed.
To get a reference through this function, take care about the default value.
toml::value v("foo"); // v contains String
toml::integer& i = toml::get_or(v, 42); // does not work because binding `42`
// to `integer&` is invalid
toml::integer opt = 42;
toml::integer& i = toml::get_or(v, opt); // this works.
Expecting conversion
By using toml::expect
, you will get your expected value or an error message
without throwing toml::type_error
.
const auto value = toml::expect<std::string>(data.at("title"));
if(value.is_ok()) {
std::cout << value.unwrap() << std::endl;
} else {
std::cout << value.unwrap_err() << std::endl;
}
Also, you can pass a function object to modify the expected value.
const auto value = toml::expect<int>(data.at("number"))
.map(// function that receives expected type (here, int)
[](const int number) -> double {
return number * 1.5 + 1.0;
}).unwrap_or(/*default value =*/ 3.14);
Visiting a toml::value
toml11 provides toml::visit
to apply a function to toml::value
in the
same way as std::variant
.
const toml::value v(3.14);
toml::visit([](const auto& val) -> void {
std::cout << val << std::endl;
}, v);
The function object that would be passed to toml::visit
must be able to
receive all the possible TOML types. Also, the result types should be the same
each other.
Constructing a toml::value
toml::value
can be constructed in various ways.
toml::value v(true); // boolean
toml::value v(42); // integer
toml::value v(3.14); // floating
toml::value v("foobar"); // string
toml::value v(toml::local_date(2019, toml::month_t::Apr, 1)); // date
toml::value v{1, 2, 3, 4, 5}; // array
toml::value v{{"foo", 42}, {"bar", 3.14}, {"baz", "qux"}}; // table
When constructing a string, you can choose to use either literal or basic string. By default, it will be a basic string.
toml::value v("foobar", toml::string_t::basic );
toml::value v("foobar", toml::string_t::literal);
Datetime objects can be constructed from std::tm
and
std::chrono::system_clock::time_point
. But you need to specify what type
you use to avoid ambiguity.
const auto now = std::chrono::system_clock::now();
toml::value v(toml::local_date(now));
toml::value v(toml::local_datetime(now));
toml::value v(toml::offset_datetime(now));
Since local time is not equivalent to a time point, because it lacks date
information, it will be constructed from std::chrono::duration
.
toml::value v(toml::local_time(std::chrono::hours(10)));
You can construct an array object not only from initializer_list
, but also
from STL containers. In that case, the element type must be convertible to
toml::value
.
std::vector<int> vec{1,2,3,4,5};
toml::value v(vec);
When you construct an array value, all the elements of initializer_list
must be convertible into toml::value
.
If a toml::value
has an array, you can push_back
an element in it.
toml::value v{1,2,3,4,5};
v.push_back(6);
emplace_back
also works.
Preserving comments
toml11 v3 or later allows you yo choose whether comments are preserved or not via template parameter
const auto data1 = toml::parse<toml::discard_comments >("example.toml");
const auto data2 = toml::parse<toml::preserve_comments>("example.toml");
or macro definition.
#define TOML11_PRESERVE_COMMENTS_BY_DEFAULT
#include <toml11/toml.hpp>
This feature is controlled by template parameter in toml::basic_value<...>
.
toml::value
is an alias of toml::basic_value<...>
.
If template parameter is explicitly specified, the return value of toml::parse
will be toml::basic_value<toml::preserve_comments>
.
If the macro is defined, the alias toml::value
will be
toml::basic_value<toml::preserve_comments>
.
Comments related to a value can be obtained by toml::value::comments()
.
The return value has the same interface as std::vector<std::string>
.
const auto& com = v.comments();
for(const auto& c : com)
{
std::cout << c << std::endl;
}
Comments just before and just after (within the same line) a value are kept in a value.
# this is a comment for v1.
v1 = "foo"
v2 = "bar" # this is a comment for v2.
# Note that this comment is NOT a comment for v2.
# this comment is not related to any value
# because there are empty lines between v3.
# this comment will be ignored even if you set `preserve_comments`.
# this is a comment for v3
# this is also a comment for v3.
v3 = "baz" # ditto.
Each comment line becomes one element of a std::vector
.
Hash signs will be removed, but spaces after hash sign will not be removed.
v1.comments().at(0) == " this is a comment for v1."s;
v2.comments().at(1) == " this is a comment for v1."s;
v3.comments().at(0) == " this is a comment for v3."s;
v3.comments().at(1) == " this is also a comment for v3."s;
v3.comments().at(2) == " ditto."s;
Note that a comment just after an opening brace of an array will not be a comment for the array.
# this is a comment for a.
a = [ # this is not a comment for a. this will be ignored.
1, 2, 3,
# this is a comment for `42`.
42, # this is also a comment for `42`.
5
] # this is a comment for a.
You can also append and modify comments.
The interfaces are the same as std::vector<std::string>
.
toml::basic_value<toml::preserve_comments> v(42);
v.comments().push_back(" add this comment.");
// # add this comment.
// i = 42
Also, you can pass a std::vector<std::string>
when constructing a
toml::basic_value<toml::preserve_comments>
.
std::vector<std::string> comments{"comment 1", "comment 2"};
const toml::basic_value<toml::preserve_comments> v1(42, std::move(comments));
const toml::basic_value<toml::preserve_comments> v2(42, {"comment 1", "comment 2"});
When toml::discard_comments
is chosen, comments will not be contained in a value.
value::comments()
will always be kept empty.
All the modification on comments would be ignored.
All the element access in a discard_comments
causes the same error as accessing
an element of an empty std::vector
.
The comments will also be serialized. If comments exist, those comments will be added just before the values.
NOTE: Result types from toml::parse(...)
and
toml::parse<toml::preserve_comments>(...)
are different.
Customizing containers
Actually, toml::basic_value
has 3 template arguments.
template<typename Comment, // discard/preserve_comment
template<typename ...> class Table = std::unordered_map,
template<typename ...> class Array = std::vector>
class basic_value;
This enables you to change the containers used inside. E.g. you can use
std::map
to contain a table object instead of std::unordered_map
.
And also can use std::deque
as a array object instead of std::vector
.
You can set these parameters while calling toml::parse
function.
const auto data = toml::parse<
toml::preserve_comments, std::map, std::deque
>("example.toml");
Needless to say, the result types from toml::parse(...)
and
toml::parse<Com, Map, Cont>(...)
are different (unless you specify the same
types as default).
Note that, since toml::table
and toml::array
is an alias for a table and an
array of a default toml::value
, so it is different from the types actually
contained in a toml::basic_value
when you customize containers.
To get the actual type in a generic way, use
typename toml::basic_type<C, T, A>::table_type
and
typename toml::basic_type<C, T, A>::array_type
.
TOML literal
toml11 supports "..."_toml
literal.
It accept both a bare value and a file content.
using namespace toml::literals::toml_literals;
// `_toml` can convert a bare value without key
const toml::value v = u8"0xDEADBEEF"_toml;
// v is an Integer value containing 0xDEADBEEF.
// raw string literal (`R"(...)"` is useful for this purpose)
const toml::value t = u8R"(
title = "this is TOML literal"
[table]
key = "value"
)"_toml;
// the literal will be parsed and the result will be contained in t
The literal function is defined in the same way as the standard library literals
such as std::literals::string_literals::operator""s
.
namespace toml
{
inline namespace literals
{
inline namespace toml_literals
{
toml::value operator"" _toml(const char* str, std::size_t len);
} // toml_literals
} // literals
} // toml
Access to the operator can be gained with using namespace toml::literals;
,
using namespace toml::toml_literals
, and using namespace toml::literals::toml_literals
.
Note that a key that is composed only of digits is allowed in TOML.
And, unlike the file parser, toml-literal allows a bare value without a key.
Thus it is difficult to distinguish arrays having integers and definitions of
tables that are named as digits.
Currently, literal [1]
becomes a table named "1".
To ensure a literal to be considered as an array with one element, you need to
add a comma after the first element (like [1,]
).
"[1,2,3]"_toml; // This is an array
"[table]"_toml; // This is 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 literal is ambiguous.
// Currently, it becomes a table that has array of table "1".
"1 = [{}]"_toml; // This is a table that has an array of table named 1.
"[[1,]]"_toml; // This is an array of arrays.
"[[1],]"_toml; // ditto.
NOTE: _toml
literal returns a toml::value
that does not have comments.
Conversion between toml value and arbitrary types
You can also use toml::get
and other related functions with the types
you defined after you implement a way to convert it.
namespace ext
{
struct foo
{
int a;
double b;
std::string c;
};
} // ext
const auto data = toml::parse("example.toml");
// to do this
const foo f = toml::find<ext::foo>(data, "foo");
There are 3 ways to use toml::get
with the types that you defined.
The first one is to implement from_toml(const toml::value&)
member function.
namespace ext
{
struct foo
{
int a;
double b;
std::string c;
void from_toml(const toml::value& v)
{
this->a = toml::find<int >(v, "a");
this->b = toml::find<double >(v, "b");
this->c = toml::find<std::string>(v, "c");
return;
}
};
} // ext
In this way, because toml::get
first constructs foo
without arguments,
the type should be default-constructible.
The second is to implement constructor(const toml::value&)
.
namespace ext
{
struct foo
{
explicit foo(const toml::value& v)
: a(toml::find<int>(v, "a")), b(toml::find<double>(v, "b")),
c(toml::find<std::string>(v, "c"))
{}
int a;
double b;
std::string c;
};
} // ext
Note that implicit default constructor declaration will be suppressed
when a constructor is defined. If you want to use the struct (here, foo
)
in a container (e.g. std::vector<foo>
), you may need to define default
constructor explicitly.
The third is to implement specialization of toml::from
for your type.
namespace ext
{
struct foo
{
int a;
double b;
std::string c;
};
} // ext
namespace toml
{
template<>
struct from<ext::foo>
{
static ext::foo from_toml(const value& v)
{
ext::foo f;
f.a = find<int >(v, "a");
f.b = find<double >(v, "b");
f.c = find<std::string>(v, "c");
return f;
}
};
} // toml
In this way, since the conversion function is defined outside of the class,
you can add conversion between toml::value
and classes defined in another library.
In some cases, a class has a templatized constructor that takes a template, T
.
It confuses toml::get/find<T>
because it makes the class "constructible" from
toml::value
. To avoid this problem, toml::from
and from_toml
always
precede constructor. It makes easier to implement conversion between
toml::value
and types defined in other libraries because it skips constructor.
But, importantly, you cannot define toml::from<T>
and T.from_toml
at the same
time because it causes ambiguity in the overload resolution of toml::get<T>
and toml::find<T>
.
So the precedence is toml::from<T>
== T.from_toml()
> T(toml::value)
.
If you want to convert any versions of toml::basic_value
,
you need to templatize the conversion function as follows.
struct foo
{
template<typename C, template<typename ...> class M, template<typename ...> class A>
void from_toml(const toml::basic_value<C, M, A>& v)
{
this->a = toml::find<int >(v, "a");
this->b = toml::find<double >(v, "b");
this->c = toml::find<std::string>(v, "c");
return;
}
};
// or
namespace toml
{
template<>
struct from<ext::foo>
{
template<typename C, template<typename ...> class M, template<typename ...> class A>
static ext::foo from_toml(const basic_value<C, M, A>& v)
{
ext::foo f;
f.a = find<int >(v, "a");
f.b = find<double >(v, "b");
f.c = find<std::string>(v, "c");
return f;
}
};
} // toml
The opposite direction is also supported in a similar way. You can directly
pass your type to toml::value
's constructor by introducing into_toml
or
toml::into<T>
.
namespace ext
{
struct foo
{
int a;
double b;
std::string c;
toml::value into_toml() const // you need to mark it const.
{
return toml::value{{"a", this->a}, {"b", this->b}, {"c", this->c}};
}
};
} // ext
ext::foo f{42, 3.14, "foobar"};
toml::value v(f);
The definition of toml::into<T>
is similar to toml::from<T>
.
namespace ext
{
struct foo
{
int a;
double b;
std::string c;
};
} // ext
namespace toml
{
template<>
struct into<ext::foo>
{
static toml::value into_toml(const ext::foo& f)
{
return toml::value{{"a", f.a}, {"b", f.b}, {"c", f.c}};
}
};
} // toml
ext::foo f{42, 3.14, "foobar"};
toml::value v(f);
Any type that can be converted to toml::value
, e.g. int
, toml::table
and
toml::array
are okay to return from into_toml
.
You can also return a custom toml::basic_value
from toml::into
.
namespace toml
{
template<>
struct into<ext::foo>
{
static toml::basic_value<toml::preserve_comments> into_toml(const ext::foo& f)
{
toml::basic_value<toml::preserve_comments> v{{"a", f.a}, {"b", f.b}, {"c", f.c}};
v.comments().push_back(" comment");
return v;
}
};
} // toml
But note that, if this basic_value
would be assigned into other toml::value
that discards comments
, the comments would be dropped.
Macro to automatically define conversion functions
There is a helper macro that automatically generates conversion functions from
and into
for a simple struct.
namespace foo
{
struct Foo
{
std::string s;
double d;
int i;
};
} // foo
TOML11_DEFINE_CONVERSION_NON_INTRUSIVE(foo::Foo, s, d, i)
int main()
{
const auto file = toml::parse("example.toml");
auto f = toml::find<foo::Foo>(file, "foo");
}
And then you can use toml::find<foo::Foo>(file, "foo");
Note that, because of a slight difference in implementation of preprocessor between gcc/clang and MSVC, you need to define /Zc:preprocessor
to use it in MSVC (Thank you @glebm !).
Formatting user-defined error messages
When you encounter an error after you read the toml value, you may want to show the error with the value.
toml11 provides you a function that formats user-defined error message with related values. With a code like the following,
const auto value = toml::find<int>(data, "num");
if(value < 0)
{
std::cerr << toml::format_error("[error] value should be positive",
data.at("num"), "positive number required")
<< std::endl;
}
you will get an error message like this.
[error] value should be positive
--> example.toml
3 | num = -42
| ~~~ positive number required
When you pass two values to toml::format_error
,
const auto min = toml::find<int>(range, "min");
const auto max = toml::find<int>(range, "max");
if(max < min)
{
std::cerr << toml::format_error("[error] max should be larger than min",
data.at("min"), "minimum number here",
data.at("max"), "maximum number here");
<< std::endl;
}
you will get an error message like this.
[error] max should be larger than min
--> example.toml
3 | min = 54
| ~~ minimum number here
...
4 | max = 42
| ~~ maximum number here
You can print hints at the end of the message.
std::vector<std::string> hints;
hints.push_back("positive number means n >= 0.");
hints.push_back("negative number is not positive.");
std::cerr << toml::format_error("[error] value should be positive",
data.at("num"), "positive number required", hints)
<< std::endl;
[error] value should be positive
--> example.toml
2 | num = 42
| ~~ positive number required
|
Hint: positive number means n >= 0.
Hint: negative number is not positive.
Obtaining location information
You can also format error messages in your own way by using source_location
.
struct source_location
{
std::uint_least32_t line() const noexcept;
std::uint_least32_t column() const noexcept;
std::uint_least32_t region() const noexcept;
std::string const& file_name() const noexcept;
std::string const& line_str() const noexcept;
};
// +-- line() +--- length of the region (here, region() == 9)
// v .---+---.
// 12 | value = "foo bar" <- line_str() returns the line itself.
// ^-------- column() points here
You can get this by
const toml::value v = /*...*/;
const toml::source_location loc = v.location();
Exceptions
The following exception
classes inherits toml::exception
that inherits
std::exception
.
namespace toml {
struct exception : public std::exception {/**/};
struct syntax_error : public toml::exception {/**/};
struct type_error : public toml::exception {/**/};
struct internal_error : public toml::exception {/**/};
} // toml
toml::exception
has toml::exception::location()
member function that returns
toml::source_location
, in addition to what()
.
namespace toml {
struct exception : public std::exception
{
// ...
source_location const& location() const noexcept;
};
} // toml
It represents where the error occurs.
syntax_error
will be thrown from toml::parse
and _toml
literal.
type_error
will be thrown from toml::get/find
, toml::value::as_xxx()
, and
other functions that takes a content inside of toml::value
.
Note that, currently, from toml::value::at()
and toml::find(value, key)
may throw an std::out_of_range
that does not inherits toml::exception
.
Also, in some cases, most likely in the file open error, it will throw an
std::runtime_error
.
Colorize Error Messages
By defining TOML11_COLORIZE_ERROR_MESSAGE
, the error messages from
toml::parse
and toml::find|get
will be colorized. By default, this feature
is turned off.
With the following toml file taken from toml-lang/toml/tests/hard_example.toml
,
[error]
array = [
"This might most likely happen in multiline arrays",
Like here,
"or here,
and here"
] End of array comment, forgot the #
the error message would be like this.
With the following,
[error]
# array = [
# "This might most likely happen in multiline arrays",
# Like here,
# "or here,
# and here"
# ] End of array comment, forgot the #
number = 3.14 pi <--again forgot the #
the error message would be like this.
The message would be messy when it is written to a file, not a terminal because it uses ANSI escape code.
Without TOML11_COLORIZE_ERROR_MESSAGE
, you can still colorize user-defined
error message by passing true
to the toml::format_error
function.
If you define TOML11_COLORIZE_ERROR_MESSAGE
, the value is true
by default.
If not, the default value would be false
.
std::cerr << toml::format_error("[error] value should be positive",
data.at("num"), "positive number required",
hints, /*colorize = */ true) << std::endl;
Note: It colorize [error]
in red. That means that it detects [error]
prefix
at the front of the error message. If there is no [error]
prefix,
format_error
adds it to the error message.
Serializing TOML data
toml11 enables you to serialize data into toml format.
const toml::value data{{"foo", 42}, {"bar", "baz"}};
std::cout << data << std::endl;
// bar = "baz"
// foo = 42
toml11 automatically makes a small table and small array inline.
You can specify the width to make them inline by std::setw
for streams.
const toml::value data{
{"qux", {{"foo", 42}, {"bar", "baz"}}},
{"quux", {"small", "array", "of", "strings"}},
{"foobar", {"this", "array", "of", "strings", "is", "too", "long",
"to", "print", "into", "single", "line", "isn't", "it?"}},
};
// the threshold becomes 80.
std::cout << std::setw(80) << data << std::endl;
// foobar = [
// "this","array","of","strings","is","too","long","to","print","into",
// "single","line","isn't","it?",
// ]
// quux = ["small","array","of","strings"]
// qux = {bar="baz",foo=42}
// the width is 0. nothing become inline.
std::cout << std::setw(0) << data << std::endl;
// foobar = [
// "this",
// ... (snip)
// "it?",
// ]
// quux = [
// "small",
// "array",
// "of",
// "strings",
// ]
// [qux]
// bar = "baz"
// foo = 42
It is recommended to set width before printing data. Some I/O functions changes
width to 0, and it makes all the stuff (including toml::array
) multiline.
The resulting files becomes too long.
To control the precision of floating point numbers, you need to pass
std::setprecision
to stream.
const toml::value data{
{"pi", 3.141592653589793},
{"e", 2.718281828459045}
};
std::cout << std::setprecision(17) << data << std::endl;
// e = 2.7182818284590451
// pi = 3.1415926535897931
std::cout << std::setprecision( 7) << data << std::endl;
// e = 2.718282
// pi = 3.141593
There is another way to format toml values, toml::format()
.
It returns std::string
that represents a value.
const toml::value v{{"a", 42}};
const std::string fmt = toml::format(v);
// a = 42
Note that since toml::format
formats a value, the resulting string may lack
the key value.
const toml::value v{3.14};
const std::string fmt = toml::format(v);
// 3.14
To control the width and precision, toml::format
receives optional second and
third arguments to set them. By default, the width is 80 and the precision is
std::numeric_limits<double>::max_digit10
.
const auto serial = toml::format(data, /*width = */ 0, /*prec = */ 17);
When you pass a comment-preserving-value, the comment will also be serialized. An array or a table containing a value that has a comment would not be inlined.
Underlying types
The toml types (can be used as toml::*
in this library) and corresponding enum
names are listed in the table below.
TOML type | underlying c++ type | enum class |
---|---|---|
Boolean | bool |
toml::value_t::boolean |
Integer | std::int64_t |
toml::value_t::integer |
Float | double |
toml::value_t::floating |
String | toml::string |
toml::value_t::string |
LocalDate | toml::local_date |
toml::value_t::local_date |
LocalTime | toml::local_time |
toml::value_t::local_time |
LocalDatetime | toml::local_datetime |
toml::value_t::local_datetime |
OffsetDatetime | toml::offset_datetime |
toml::value_t::offset_datetime |
Array | array-like<toml::value> |
toml::value_t::array |
Table | map-like<toml::key, toml::value> |
toml::value_t::table |
array-like
and map-like
are the STL containers that works like a std::vector
and
std::unordered_map
, respectively. By default, std::vector
and std::unordered_map
are used. See Customizing containers for detail.
toml::string
is effectively the same as std::string
but has an additional
flag that represents a kind of a string, string_t::basic
and string_t::literal
.
Although std::string
is not an exact toml type, still you can get a reference
that points to internal std::string
by using toml::get<std::string>()
for convenience.
The most important difference between std::string
and toml::string
is that
toml::string
will be formatted as a TOML string when outputted with ostream
.
This feature is introduced to make it easy to write a custom serializer.
Datetime
variants are struct
that are defined in this library.
Because std::chrono::system_clock::time_point
is a time point,
not capable of representing a Local Time independent from a specific day.
Unreleased TOML features
Since TOML v1.0.0-rc.1 has been released, those features are now activated by
default. We no longer need to define TOML11_USE_UNRELEASED_FEATURES
.
- Leading zeroes in exponent parts of floats are permitted.
- e.g.
1.0e+01
,5e+05
- toml-lang/toml/PR/656
- e.g.
- Allow raw tab characters in basic strings and multi-line basic strings.
- Allow heterogeneous arrays
Note about heterogeneous arrays
Although toml::parse
allows heterogeneous arrays, constructor of toml::value
does not. Here the reason is explained.
// this won't be compiled
toml::value v{
"foo", 3.14, 42, {1,2,3,4,5}, {{"key", "value"}}
}
There is a workaround for this. By explicitly converting values into
toml::value
, you can initialize toml::value
with a heterogeneous array.
Also, you can first initialize a toml::value
with an array and then
push_back
into it.
// OK!
toml::value v{
toml::value("foo"), toml::value(3.14), toml::value(42),
toml::value{1,2,3,4,5}, toml::value{{"key", "value"}}
}
// OK!
toml::value v(toml::array{});
v.push_back("foo");
v.push_back(3.14);
// OK!
toml::array a;
a.push_back("foo");
a.push_back(3.14);
toml::value v(std::move(a));
The reason why the first example is not allowed is the following.
Let's assume that you are initializing a toml::value
with a table.
// # expecting TOML table.
toml::value v{ // [v]
{"answer", 42}, // answer = 42
{"pi", 3.14}, // pi = 3.14
{"foo", "bar"} // foo = "bar"
};
This is indistinguishable from a (heterogeneous) TOML array definition.
v = [
["answer", 42],
["pi", 3.14],
["foo", "bar"],
]
This means that the above C++ code makes constructor's overload resolution ambiguous. So a constructor that allows both "table as an initializer-list" and "heterogeneous array as an initializer-list" cannot be implemented.
Thus, although it is painful, we need to explicitly cast values into
toml::value
when you initialize heterogeneous array in a C++ code.
toml::value v{
toml::value("foo"), toml::value(3.14), toml::value(42),
toml::value{1,2,3,4,5}, toml::value{{"key", "value"}}
};
Breaking Changes from v2
Although toml11 is relatively new library (it's three years old now), it had some confusing and inconvenient user-interfaces because of historical reasons.
Between v2 and v3, those interfaces are rearranged.
toml::parse
now returns atoml::value
, nottoml::table
.toml::value
is now an alias oftoml::basic_value<discard_comment, std::vector, std::unordered_map>
.- See Customizing containers for detail.
- The elements of
toml::value_t
are renamed assnake_case
.- See Underlying types for detail.
- Supports for the CamelCaseNames are dropped.
- See Underlying types for detail.
(is|as)_float
has been removed to make the function names consistent with others.- Since
float
is a keyword, toml11 named a float type astoml::floating
. - Also a
value_t
corresponds totoml::floating
is namedvalue_t::floating
. - So
(is|as)_floating
is introduced andis_float
has been removed. - See Casting a toml::value and Checking value type for detail.
- Since
- An overload of
toml::find
fortoml::table
has been dropped. Usetoml::value
version instead.- Because type conversion between a table and a value causes ambiguity while overload resolution
- Since
toml::parse
now returns atoml::value
, this feature becomes less important. - Also because
toml::table
is a normal STL container, implementing utility function is easy. - See Finding a toml::value for detail.
- An overload of
operator<<
andtoml::format
fortoml::table
s are dropped.- Use
toml::value
instead. - See Serializing TOML data for detail.
- Use
- Interface around comments.
- See Preserving Comments for detail.
- An ancient
from_toml/into_toml
has been removed. Use arbitrary type conversion support.- See Conversion between toml value and arbitrary types for detail.
Such a big change will not happen in the coming years.
Running Tests
After cloning this repository, run the following command (thank you @jwillikers for automating test set fetching!).
$ mkdir build
$ cd build
$ cmake .. -Dtoml11_BUILD_TEST=ON
$ make
$ make test
To run the language agnostic test suite, you need to compile
tests/check_toml_test.cpp
and pass it to the tester.
Contributors
I appreciate the help of the contributors who introduced the great feature to this library.
- Guillaume Fraux (@Luthaf)
- Windows support and CI on Appvayor
- Intel Compiler support
- Quentin Khan (@xaxousis)
- Found & Fixed a bug around ODR
- Improved error messages for invalid keys to show the location where the parser fails
- Petr Beneš (@wbenny)
- Fixed warnings on MSVC
- Ivan Shynkarenka (@chronoxor)
- Fixed Visual Studio 2019 warnings
- Khoi Dinh Trinh (@khoitd1997)
- Fixed warnings while type conversion
- @KerstinKeller
- Added installation script to CMake
- J.C. Moyer (@jcmoyer)
- Fixed an example code in the documentation
- Jt Freeman (@blockparty-sh)
- Fixed feature test macro around
localtime_s
- Suppress warnings in Debug mode
- Fixed feature test macro around
- OGAWA Kenichi (@kenichiice)
- Suppress warnings on intel compiler
- Jordan Williams (@jwillikers)
- Fixed clang range-loop-analysis warnings
- Fixed feature test macro to suppress -Wundef
- Use cache variables in CMakeLists.txt
- Automate test set fetching, update and refactor CMakeLists.txt
- Scott McCaskill
- Parse 9 digits (nanoseconds) of fractional seconds in a
local_time
- Parse 9 digits (nanoseconds) of fractional seconds in a
- Shu Wang (@halfelf)
- fix "Finding a value in an array" example in README
- @maass-tv and @SeverinLeonhardt
- Fix MSVC warning C4866
- OGAWA KenIchi (@kenichiice)
- Fix include path in README
- Mohammed Alyousef (@MoAlyousef)
- Made testing optional in CMake
- Ivan Shynkarenka (@chronoxor)
- Fix compilation error in
<filesystem>
with MinGW
- Fix compilation error in
- Alex Merry (@amerry)
- Add missing include files
- sneakypete81 (@sneakypete81)
- Fix typo in error message
- Oliver Kahrmann (@founderio)
- Fix missing filename in error message if parsed file is empty
- Karl Nilsson (@karl-nilsson)
- Fix many spelling errors
- ohdarling88 (@ohdarling)
- Fix a bug in a constructor of serializer
- estshorter (@estshorter)
- Fix MSVC warning C26478
- Philip Top (@phlptp)
- Improve checking standard library feature availability check
- Louis Marascio (@marascio)
- Fix free-nonheap-object warning
- Axel Huebl (@ax3l)
- Make installation optional if the library is embedded
Licensing terms
This product is licensed under the terms of the MIT License.
- Copyright (c) 2017-2022 Toru Niina
All rights reserved.
license | MIT |
---|---|
project | toml11 |
url | github.com/ToruNiina/toml11 |
niina.toru.68u@gmail.com |
version | 3.7.1 |
---|---|
repository | https://pkg.cppget.org/1/queue/testing |
depends | 1; libboost-test |