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https://github.com/oktonion/cpp-fast-delegates
Header-only extension for C++ Fast Delegates of Don Clugston (C++98 compatible)
https://github.com/oktonion/cpp-fast-delegates
cpp cpp03 cpp11 cpp98 crossplatform delegate delegates fast fast-delegates
Last synced: 2 days ago
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Header-only extension for C++ Fast Delegates of Don Clugston (C++98 compatible)
- Host: GitHub
- URL: https://github.com/oktonion/cpp-fast-delegates
- Owner: oktonion
- Created: 2017-07-18T14:36:49.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2024-09-22T13:03:54.000Z (4 days ago)
- Last Synced: 2024-09-24T20:55:19.247Z (2 days ago)
- Topics: cpp, cpp03, cpp11, cpp98, crossplatform, delegate, delegates, fast, fast-delegates
- Language: C++
- Homepage:
- Size: 247 KB
- Stars: 13
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# fast delegates for C++
Extended original cross platform fast delegates for C++ (C++98 compatible).
[](https://github.com/oktonion/Cpp-fast-delegates/actions/workflows/c-cpp.yml)
[](https://codecov.io/gh/oktonion/Cpp-fast-delegates)
In this delegates you could store:
1) global function
2) global function with class object (both const obj and non-const)
3) static function of class (same as two above actually)
4) member function of class with class object (both const obj and non-const)
Calls to functions stored are extremely fast (like call to original function). Delegate takes minimum memory, are crossplatform and C++98, C++11, C++14 and later standart compatible.
# What are we talking about?
f.e. we have some functions (class functions, global functions, constant or not, whatever...) with same arguments and return value:
```
int func(std::string, size_t&); // regular function
int func(SomeClass*, std::string, size_t&); // same but with class pointer
int func(SomeOtherClass*, std::string, size_t&); // same but with class pointer
int func(const SomeClass*, std::string, size_t&); // same but with class const pointer
int func(const SomeOtherClass*, std::string, size_t&); // same but with class const pointer
int SomeClass::mfunc(std::string, size_t&); // class member function
int SomeClass::mcfunc(std::string, size_t&) const; // class member const function
static int SomeClass::sfunc(std::string, size_t&); // class member static function
static int SomeClass::sfunc(SomeOtherClass*, std::string, size_t&); // same but with class pointer
static int SomeClass::sfunc(const SomeClass*, std::string, size_t&); // same but with class const pointer
int SomeOtherClass::mfunc(std::string, size_t&); // class member function
int SomeOtherClass::mcfunc(std::string, size_t&) const; // class member const function
static int SomeOtherClass::sfunc(std::string, size_t&); // class member static function
static int SomeOtherClass::sfunc(SomeOtherClass*, std::string, size_t&); // same but with class pointer
static int SomeOtherClass::sfunc(const SomeClass*, std::string, size_t&); // same but with class const pointer
// any other class actually...
```
and there is one delegate to rule them all:
```
// could contain any of functions above (with class pointer if needed):
delegate allmighty_delegate;
```
# How to use:
```
#include "delegates\delegate.h"
...
using namespace delegates;
```
then:
```
int func(unsigned char val1, size_t &val2) {/*some actual work*/ return 0;}
...
delegate d2(&func);
...
size_t val = 50;
int t = d2(2, val); // calling 'func' by delegate
```
more fun with saving class object:
```
int func(unsigned char val1, size_t &val2) {/*some actual work*/ return 0;}
struct Dummy
{
int mfunc(unsigned char val1, size_t &val2) {/*some actual class work*/ return 0;}
static int sfunc(unsigned char val1, size_t &val2) {/*some actual static work*/ return 0;}
};
int gfunc(Dummy *pdummy, unsigned char val1, size_t &val2) {/*some actual class or global work*/ return 0;}
int const_gfunc(const Dummy *pdummy, unsigned char val1, size_t &val2) {/*some actual class or global work*/ return 0;}
...
delegate d2(&func); // same delegate
...
size_t val = 50;
int t = d2(2, val); // calling 'func' by delegate
Dummy dummy;
d2.bind(&dummy, &Dummy::mfunc); // binding to specific object
t = d2(2, val); // calling 'dummy->mfunc' by delegate
d2.bind(&Dummy::sfunc); // same as just regular 'func' (first example)
t = d2(2, val); // calling 'Dummy::sfunc' by delegate
d2.bind(&dummy, &gfunc); // binding to specific object but global function taking 'object_type'
t = d2(2, val); // calling 'gfunc' by delegate with pointer to 'dummy' as first argument
d2.bind(&dummy, &const_gfunc); // binding to specific object but const global function taking 'object_type'
t = d2(2, val); // calling 'const_gfunc' by delegate with const pointer to 'dummy' as first argument
```
also you could use 'bind' to create delegate:
```
int func(unsigned char val1, size_t &val2) {/*some actual work*/ return 0;}
...
delegate d2; // same delegate again
d2 = bind(&func);
```