/Modern-CPP

Primary LanguageC++

Modern-CPP

Lambda Functions in cpp

  • a nameless snippet function

  • format[capture clause](parameters){body}

    vector<int> v{ 1,3,13,24,14,7};
    int d = 10;
    auto something = [d](int x){cout<<x+d<<endl;};
    for_each(v.begin(),v.end(),something);
    return 0;

OR

    vector<int> v{ 1,3,13,24,14,7};
    int d = 10;
    for_each(v.begin(),v.end(),[d](int x){cout<<x+d<<endl;});
    return 0;
  • both will give same output.

Data-types

Dynamic typing in cpp

  • we can create a dynamic varible to store various data types.

using *void

    int i = 1;
    float f = 3.14f;
    string s = "string";

    void* voidptr;
    voidptr = &i;
    cout << "int val: " <<  *(static_cast<int*>(voidptr)) << endl;

    voidptr = &f;
    cout << "float val: " <<  *(static_cast<float*>(voidptr)) << endl;

    voidptr = &s;
    cout << "string val: " <<  *(static_cast<string*>(voidptr)) << endl;

using any C++17

  • class which represents a generalized type-safe container for single values of any type.

  • add header file #include<any>

    any anyval;

    anyval = 42;
    cout << "int value: " << any_cast<int>(anyval) << endl;

    anyval = 3.14;
    cout << "float value: " << any_cast<float>(anyval) << endl;

    anyval = "string";
    cout << "string value: " << any_cast<string>(anyval) << endl;

Run-Time Type Identification (RTTI)

Run-Time Type Identification (RTTI) is a feature in C++ that allows you to obtain the type information of an object during program execution. This can be useful when using dynamic typing, where the type of an object can change at runtime.

There are two main mechanisms for RTTI in C++:

  • typeid operator
  • dynamic_cast operator