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Move /src to /subprojects

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This will facilitate breaking up Nix into multiple packages for each
component with Meson.
This commit is contained in:
John Ericson 2024-06-03 13:59:53 -04:00
parent 4db9487823
commit 84e2963f8e
737 changed files with 504 additions and 505 deletions
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subprojects/libutil/comparator.hh Normal file
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#pragma once
///@file
#define GENERATE_ONE_CMP(PRE, RET, QUAL, COMPARATOR, MY_TYPE, ...) \
PRE RET QUAL operator COMPARATOR(const MY_TYPE & other) const noexcept { \
__VA_OPT__(const MY_TYPE * me = this;) \
auto fields1 = std::tie( __VA_ARGS__ ); \
__VA_OPT__(me = &other;) \
auto fields2 = std::tie( __VA_ARGS__ ); \
return fields1 COMPARATOR fields2; \
}
#define GENERATE_EQUAL(prefix, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, bool, qualification, ==, my_type, args)
#define GENERATE_SPACESHIP(prefix, ret, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, ret, qualification, <=>, my_type, args)
/**
* Awful hacky generation of the comparison operators by doing a lexicographic
* comparison between the choosen fields.
*
* ```
* GENERATE_CMP(ClassName, me->field1, me->field2, ...)
* ```
*
* will generate comparison operators semantically equivalent to:
*
* ```
* auto operator<=>(const ClassName& other) const noexcept {
* if (auto cmp = field1 <=> other.field1; cmp != 0)
* return cmp;
* if (auto cmp = field2 <=> other.field2; cmp != 0)
* return cmp;
* ...
* return 0;
* }
* ```
*/
#define GENERATE_CMP(args...) \
GENERATE_EQUAL(,,args) \
GENERATE_SPACESHIP(,auto,,args)
/**
* @param prefix This is for something before each declaration like
* `template<classname Foo>`.
*
* @param my_type the type are defining operators for.
*/
#define GENERATE_CMP_EXT(prefix, ret, my_type, args...) \
GENERATE_EQUAL(prefix, my_type ::, my_type, args) \
GENERATE_SPACESHIP(prefix, ret, my_type ::, my_type, args)