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Improve docs
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doc/api.md
33
doc/api.md
@ -273,7 +273,7 @@ You can create your own formatting function with compile-time checks and
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small binary footprint, for example ([run](https://godbolt.org/z/b9Pbasvzc)):
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```c++
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#include <fmt/base.h>
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#include <fmt/format.h>
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void vlog(const char* file, int line,
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fmt::string_view fmt, fmt::format_args args) {
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@ -514,14 +514,14 @@ feature](https://en.cppreference.com/w/cpp/feature_test).
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#include <fmt/std.h>
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std::variant<char, float> v0{'x'};
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// Prints "variant('x')"
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fmt::print("{}", v0);
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fmt::print("{}", std::variant<char, float>('x'));
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// Output: variant('x')
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std::variant<std::monostate, char> v1;
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// Prints "variant(monostate)"
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fmt::print("{}", std::variant<std::monostate, char>());
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// Output: variant(monostate)
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## Format String Compilation {#compile-api}
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<a id="compile-api"></a>
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## Format String Compilation
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`fmt/compile.h` provides format string compilation enabled via the
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`FMT_COMPILE` macro or the `_cf` user-defined literal. Format strings
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@ -615,26 +615,19 @@ if an argument type doesn\'t match its format specification.
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::: sprintf(const S&, const T&...)
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## `wchar_t` Support {#xchar-api}
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<a id="xchar-api"></a>
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## Wide Strings
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The optional header `fmt/xchar.h` provides support for `wchar_t` and
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exotic character types.
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:: {.doxygenstruct}
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fmt::is_char
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::
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::: is_char
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:: {.doxygentypedef}
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fmt::wstring_view
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::
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::: wstring_view
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:: {.doxygentypedef}
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fmt::wformat_context
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::
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::: wformat_context
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:: {.doxygenfunction}
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fmt::to_wstring(const T &value)
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::
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::: to_wstring(const T&)
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## Compatibility with C++20 `std::format`
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@ -813,25 +813,17 @@ FMT_BEGIN_EXPORT
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enum { inline_buffer_size = 500 };
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/**
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\rst
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A dynamically growing memory buffer for trivially copyable/constructible types
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with the first ``SIZE`` elements stored in the object itself.
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You can use the ``memory_buffer`` type alias for ``char`` instead.
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**Example**::
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auto out = fmt::memory_buffer();
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fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
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This will append the following output to the ``out`` object:
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.. code-block:: none
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The answer is 42.
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The output can be converted to an ``std::string`` with ``to_string(out)``.
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\endrst
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* A dynamically growing memory buffer for trivially copyable/constructible
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* types with the first `SIZE` elements stored in the object itself. Most
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* commonly used via the `memory_buffer` alias for `char`.
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*
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* **Example**::
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*
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* auto out = fmt::memory_buffer();
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* fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
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*
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* This will append "The answer is 42." to `out`. The buffer content can be
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* converted to `std::string` with `to_string(out)`.
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*/
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template <typename T, size_t SIZE = inline_buffer_size,
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typename Allocator = std::allocator<T>>
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@ -904,22 +896,14 @@ class basic_memory_buffer : public detail::buffer<T> {
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}
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public:
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/**
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\rst
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Constructs a :class:`fmt::basic_memory_buffer` object moving the content
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of the other object to it.
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\endrst
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*/
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/// Constructs a `basic_memory_buffer` object moving the content of the other
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/// object to it.
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FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept
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: detail::buffer<T>(grow) {
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move(other);
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}
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/**
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\rst
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Moves the content of the other ``basic_memory_buffer`` object to this one.
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\endrst
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*/
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/// Moves the content of the other `basic_memory_buffer` object to this one.
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auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
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FMT_ASSERT(this != &other, "");
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deallocate();
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@ -930,13 +914,11 @@ class basic_memory_buffer : public detail::buffer<T> {
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// Returns a copy of the allocator associated with this buffer.
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auto get_allocator() const -> Allocator { return alloc_; }
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/**
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Resizes the buffer to contain *count* elements. If T is a POD type new
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elements may not be initialized.
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*/
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/// Resizes the buffer to contain *count* elements. If T is a POD type new
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/// elements may not be initialized.
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FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
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/** Increases the buffer capacity to *new_capacity*. */
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/// Increases the buffer capacity to *new_capacity*.
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void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
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using detail::buffer<T>::append;
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@ -965,7 +947,7 @@ FMT_BEGIN_EXPORT
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# pragma clang diagnostic ignored "-Wweak-vtables"
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#endif
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/** An error reported from a formatting function. */
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/// An error reported from a formatting function.
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class FMT_SO_VISIBILITY("default") format_error : public std::runtime_error {
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public:
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using std::runtime_error::runtime_error;
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@ -1828,14 +1810,12 @@ inline auto find_escape(const char* begin, const char* end)
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}()
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/**
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\rst
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Constructs a compile-time format string from a string literal *s*.
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**Example**::
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// A compile-time error because 'd' is an invalid specifier for strings.
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std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
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\endrst
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* Constructs a compile-time format string from a string literal *s*.
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*
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* **Example**::
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*
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* // A compile-time error because 'd' is an invalid specifier for strings.
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* std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
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*/
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#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
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@ -4028,13 +4008,11 @@ template <typename Char, size_t N>
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struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};
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/**
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\rst
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Converts ``p`` to ``const void*`` for pointer formatting.
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**Example**::
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auto s = fmt::format("{}", fmt::ptr(p));
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\endrst
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* Converts `p` to `const void*` for pointer formatting.
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*
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* **Example**::
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*
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* auto s = fmt::format("{}", fmt::ptr(p));
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*/
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template <typename T> auto ptr(T p) -> const void* {
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static_assert(std::is_pointer<T>::value, "");
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@ -4042,14 +4020,12 @@ template <typename T> auto ptr(T p) -> const void* {
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}
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/**
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\rst
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Converts ``e`` to the underlying type.
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**Example**::
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enum class color { red, green, blue };
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auto s = fmt::format("{}", fmt::underlying(color::red));
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\endrst
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* Converts `e` to the underlying type.
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*
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* **Example**::
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*
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* enum class color { red, green, blue };
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* auto s = fmt::format("{}", fmt::underlying(color::red));
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*/
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template <typename Enum>
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constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
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@ -4199,15 +4175,11 @@ template <typename T, typename Char = char> struct nested_formatter {
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};
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/**
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\rst
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Converts *value* to ``std::string`` using the default format for type *T*.
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**Example**::
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#include <fmt/format.h>
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std::string answer = fmt::to_string(42);
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\endrst
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* Converts *value* to ``std::string`` using the default format for type *T*.
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*
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* **Example**::
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*
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* std::string answer = fmt::to_string(42);
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*/
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template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
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!detail::has_format_as<T>::value)>
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@ -4381,15 +4353,13 @@ constexpr auto operator""_a(const char* s, size_t) -> detail::udl_arg<char> {
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FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
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/**
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\rst
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Formats ``args`` according to specifications in ``fmt`` and returns the result
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as a string.
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**Example**::
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#include <fmt/core.h>
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std::string message = fmt::format("The answer is {}.", 42);
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\endrst
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* Formats `args` according to specifications in `fmt` and returns the result
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* as a string.
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*
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* **Example**::
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*
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* #include <fmt/core.h>
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* std::string message = fmt::format("The answer is {}.", 42);
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*/
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template <typename... T>
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FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
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@ -52,7 +52,7 @@ def doxyxml2html(nodes: list[et.Element]):
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out += n.tail
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return out
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def get_template_params(node: et.Element) -> Optional[list[Definition]]:
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def convert_template_params(node: et.Element) -> Optional[list[Definition]]:
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templateparamlist = node.find('templateparamlist')
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if templateparamlist is None:
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return None
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@ -81,10 +81,20 @@ def convert_type(type: et.Element) -> str:
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result += type.tail.strip()
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return clean_type(result)
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def convert_param(param: et.Element) -> Definition:
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d = Definition(param.find('declname').text, 'param')
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d.type = convert_type(param.find('type'))
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return d
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def convert_params(func: et.Element) -> Definition:
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params = []
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for p in func.findall('param'):
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d = Definition(p.find('declname').text, 'param')
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d.type = convert_type(p.find('type'))
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params.append(d)
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return params
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def convert_return_type(d: Definition, node: et.Element) -> None:
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d.trailing_return_type = None
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if d.type == 'auto' or d.type == 'constexpr auto':
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parts = node.find('argsstring').text.split(' -> ')
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if len(parts) > 1:
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d.trailing_return_type = clean_type(parts[1])
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def render_decl(d: Definition) -> None:
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text = '<pre><code class="language-cpp">'
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@ -105,7 +115,7 @@ def render_decl(d: Definition) -> None:
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text += '(' + escape_html(params) + ')'
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if d.trailing_return_type:
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text += '\n ' \
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if len(d.name) + len(params) + len(d.trailing_return_type) > 74 else ''
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if len(d.name) + len(params) + len(d.trailing_return_type) > 68 else ''
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text += ' -> ' + escape_html(d.trailing_return_type)
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elif d.kind == 'typedef':
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text += ' = ' + escape_html(d.type)
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@ -182,20 +192,16 @@ class CxxHandler(BaseHandler):
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params = None
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kind = node.get('kind')
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if kind == 'function':
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params = [convert_param(p) for p in node.findall('param')]
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params = convert_params(node)
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node_param_str = ', '.join([p.type for p in params])
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if param_str and param_str != node_param_str:
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candidates.append(f'{name}({node_param_str})')
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continue
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d = Definition(name, kind)
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d.type = convert_type(node.find('type'))
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d.template_params = get_template_params(node)
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d.template_params = convert_template_params(node)
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d.params = params
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d.trailing_return_type = None
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if d.type == 'auto' or d.type == 'constexpr auto':
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parts = node.find('argsstring').text.split(' -> ')
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if len(parts) > 1:
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d.trailing_return_type = clean_type(parts[1])
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convert_return_type(d, node)
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d.desc = get_description(node)
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return d
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@ -207,16 +213,28 @@ class CxxHandler(BaseHandler):
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xml = et.parse(f)
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node = xml.find('compounddef')
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d = Definition(name, node.get('kind'))
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d.template_params = get_template_params(node)
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d.template_params = convert_template_params(node)
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d.desc = get_description(node)
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d.members = []
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for m in node.findall('sectiondef[@kind="public-attrib"]/memberdef'):
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for m in node.findall('sectiondef[@kind="public-attrib"]/memberdef') + \
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node.findall('sectiondef[@kind="public-func"]/memberdef'):
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name = m.find('name').text
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member = Definition(name if name else '', m.get('kind'))
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# Doxygen incorrectly classifies members of private unnamed unions as
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# public members of the containing class.
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if name.endswith('_'):
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continue
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desc = get_description(m)
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if len(desc) == 0:
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continue
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kind = m.get('kind')
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member = Definition(name if name else '', kind)
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type = m.find('type').text
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member.type = type if type else ''
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if kind == 'function':
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member.params = convert_params(m)
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convert_return_type(member, m)
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member.template_params = None
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member.desc = get_description(m)
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member.desc = desc
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d.members.append(member)
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return d
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