dk949

#ifndef UT_OVERLOAD
#define UT_OVERLOAD

namespace ut {

/**
 * Create an overload set for lambdas
 *
 * Requires C++17
 *

dk949

#ifndef UT_ASIS
#define UT_ASIS
#include <memory>
#include <type_traits>

namespace ut {

/**
 * Try to downcast from reference type `From` to pointer to `To`.
 *

dk949

//! A very basic utility to manage date and time in UTC timezone.
//!
//! Usage:
//!
//! ```zig
//! // The following examples assume that the current date and time is 25th May 1977, at 08:48 PM
//! const now = DateTime.now();
//! std.debug.print("{}\n", .{now}); // 1977-05-25 20:48:00
//! std.debug.print("{%d %B %Y at %I}:{%M %p}\n", .{ now, now }); // 25 May 1977 at 08:48 PM
//! // NOTE: the format string has to be split in two, because `:` is a special character in fmt

dk949

#ifndef UT_CHECK_HPP
#define UT_CHECK_HPP

/// Class for checking when a c++ object is constructed, copied, moved from or destructed

/* Usage:
 *
 * std >= c++11
 *
 * #include "check.hpp"

dk949

#ifndef UT_CONSTEXPR_HASH_HPP
#define UT_CONSTEXPR_HASH_HPP
#include <string_view>

/* Usage:
 *
 * int main(int argc, char const **argv) {
 *     constexpr auto hash = ut::fnv_1a<>; // defaults to uint64_t
 *
 *     for (int i = 1; i < argc; i++) {

dk949

#ifndef UT_ADD_NOEXCEPT_H
#define UT_ADD_NOEXCEPT_H

namespace ut {
/* Add noexcept to function type
 *
 * std >= c++17
 */

/* Usage:

dk949

#ifndef UT_CHANGE_OBSERVER
#define UT_CHANGE_OBSERVER

#include <functional>
#include <type_traits>
#include <vector>

namespace ut {

// NOTE: There's 2 versions of several member functions because if the move

dk949

"""
A small script to fix the datetime of jpg files in a directory.
It copies the exif datetime to the file's mtime and vice versa.

This can fix various importing issues with photo management software (e.g. Google photos).


NOTE: This script uses the piexif library to read and write exif data, you will need to install it.

NOTE 2: This script will overwrite the mtime of the files. If you use the

dk949

#ifndef UT_COPY_TRAITS
#define UT_COPY_TRAITS

/**
 * Usage:
 *  std >= c++20
 *
 *  using A = int;
 *  using B = float;
 *  using C = copy_cvref_t<A, B>; // decltype(C) == float

dk949

---Inspect a value
---
---Converts nil, boolean, number, string or table to string
---Any other type is converted with `tostring`.
---
---List-like tables are printed without their indices
---
---Usage:
---
---```lua