111 lines
3.6 KiB
Markdown
111 lines
3.6 KiB
Markdown
mp
|
|
===
|
|
|
|
A small, 0BSD-licensed metaprogramming library for C++17.
|
|
|
|
This is intended to be a lightweight and easy to understand implementation of a subset of useful metaprogramming utilities.
|
|
|
|
Usage
|
|
-----
|
|
|
|
Just add the `include` directory to your include path. That's it.
|
|
|
|
`typelist`
|
|
----------
|
|
|
|
A `mp::list` is a list of types. This set of headers provide metafunctions for manipulating lists of types.
|
|
|
|
### Constructor
|
|
|
|
* `mp::list`: Constructs a list.
|
|
* `mp::lift_sequence`: Lifts a value sequence into a list. Intended for use on `std::integral_sequence`.
|
|
|
|
### Element access
|
|
|
|
* `mp::get`: Gets a numbered element of a list.
|
|
* `mp::head`: Gets the first element of a list.
|
|
* `mp::tail`: Gets all-but-the-first-element as a list.
|
|
|
|
### Properties
|
|
|
|
* `mp::length`: Gets the length of a list.
|
|
* `mp::contains`: Determines if this list contains a specified element.
|
|
|
|
### Modifiers
|
|
|
|
* `mp::append`: Constructs a list with the provided elements appended to it.
|
|
* `mp::prepend`: Constructs a list with the provided elements prepended to it.
|
|
|
|
### Operations
|
|
|
|
* `mp::concat`: Concantenates multiple lists together.
|
|
* `mp::cartesian_product`: Construct a list containing the [cartesian product](https://en.wikipedia.org/wiki/Cartesian_product) of the provided lists.
|
|
|
|
### Conversions
|
|
|
|
* `mp::lower_to_tuple`: This operation only works on a list solely containing metavalues. Results in a `std::tuple` with equivalent values.
|
|
|
|
|
|
`metavalue`
|
|
-----------
|
|
|
|
A metavalue is a type of template `std::integral_constant`.
|
|
|
|
### Constants
|
|
|
|
* [`std::true_type`](https://en.cppreference.com/w/cpp/types/integral_constant)
|
|
* [`std::false_type`](https://en.cppreference.com/w/cpp/types/integral_constant)
|
|
|
|
### Constructor
|
|
|
|
* [`std::integral_constant`](https://en.cppreference.com/w/cpp/types/integral_constant)
|
|
* [`std::bool_constant`](https://en.cppreference.com/w/cpp/types/integral_constant)
|
|
* `mp::lift_value`: Lifts a value to become a metavalue
|
|
|
|
### Conversions
|
|
|
|
* `mp::value_cast`
|
|
|
|
### Operations
|
|
|
|
* `mp::value_equal`: Compares value equality, ignores type. Use `std::is_same` for strict comparison.
|
|
* [`std::negation`](https://en.cppreference.com/w/cpp/types/negation)
|
|
* [`std::conjunction`](https://en.cppreference.com/w/cpp/types/conjunction)
|
|
* [`std::disjunction`](https://en.cppreference.com/w/cpp/types/disjunction)
|
|
|
|
`metafunction`
|
|
--------------
|
|
|
|
* `std::void_t`: Always returns `void`.
|
|
* `mp::identity`: Identity metafunction. Can be used to establish a non-deduced context. See also C++20 `std::type_identity`.
|
|
* `mp::apply`: Invoke a provided metafunction with arguments specified in a list.
|
|
* `mp::map`: Apply a provided metafunction to each element of a list.
|
|
* `mp::bind`: Curry a metafunction. A macro `MM_MP_BIND` is provided to make this a little prettier.
|
|
|
|
`traits`
|
|
--------
|
|
|
|
Type traits not in the standard library.
|
|
|
|
### `function_info`
|
|
|
|
* `mp::parameter_count_v`: Number of parameters a function has
|
|
* `mp::parameter_list`: Get a typelist of the parameter types
|
|
* `mp::get_parameter`: Get the type of a parameter by index
|
|
* `mp::equivalent_function_type`: Get an equivalent function type (for MFPs this does not include the class)
|
|
* `mp::return_type`: Return type of the function
|
|
* `mp::class_type`: Only valid for member function pointer types. Gets the class the member function is associated with.
|
|
|
|
### `integer_of_size`
|
|
|
|
* `mp::signed_integer_of_size`: Gets a signed integer of the specified bit-size (if it exists)
|
|
* `mp::unsigned_integer_of_size`: Gets an unsigned integer of the specified bit-size (if it exists)
|
|
|
|
### Misc
|
|
|
|
* `mp::is_instance_of_template`: Checks if a type is an instance of a template class.
|
|
|
|
License
|
|
-------
|
|
|
|
Please see [LICENSE-0BSD](LICENSE-0BSD).
|