format.h File Reference

#include <concepts>
#include <format>
#include <functional>
#include <iostream>
#include <ostream>
#include <print>
#include <ranges>
#include <sstream>
#include <string_view>
#include <utility>
#include "fe/bitset.h"
#include "fe/loc.h"
#include "fe/utf8.h"

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Classes
class	fe::StreamFn< F >
	Wrap a callable f(std::ostream&) -> std::ostream& so it streams via operator<< and std::format. More...
struct	fe::basic_ostream_formatter< Char >
	Make types that support ostream operators available for std::format. More...
class	fe::Tab
	Keeps track of indentation level during output. More...
class	fe::Join< R >
	Join elements of range with sep. More...

Namespaces
namespace	fe

Concepts
concept	fe::Formattable

Macros
#define	assertf(condition, ...)
	Like assert, but with a std::format-style message: assertf(p != nullptr, "bad ptr {}", id).

Typedefs
using	fe::ostream_formatter = basic_ostream_formatter<char>

Functions
template<class F>
	fe::StreamFn (F) -> StreamFn< F >
template<class R>
	fe::Join (R &&, std::string_view=", ") -> Join< R >

Macro Definition Documentation

assertf

#define assertf	(		condition,
			... )

Value:

do {                                                                                             \
    if (!(condition)) {                                                                          \
        std::println(std::cerr, "{}:{}: assertion `{}` failed", __FILE__, __LINE__, #condition); \
        std::println(std::cerr, __VA_ARGS__);                                                    \
        fe::breakpoint();                                                                        \
    }                                                                                            \
} while (false)

Like assert, but with a std::format-style message: assertf(p != nullptr, "bad ptr {}", id).

Note

A message is required - at least a format-string argument must follow condition. For a bare assertion without a message just use vanilla assert. (Supporting zero message args here would need a surprising amount of preprocessor hackery, especially on MSVC, and isn't worth it.)

Definition at line 198 of file format.h.