Jocodoma

This is my learning notes from the course - Mastering C++ Standard Library Features.

Lambdas as Local Functions

• Use cases for lambdas as local functions
• IIEF idiom

Why Lambdas as Local Functions?

• Reduce code repetition without exposing additional functions
• Achieve const correctness with the IIFE idiom
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This is my learning notes from the course - Mastering C++ Standard Library Features.

Mastering Lambdas

• Lambdas and the Standard Library
• Lambdas as local functions
  • IIFE idiom
• Using higher order functions to build safer interfaces

Lambdas and the Standard Library

• Using lambdas with:
  • <algorithm>
  • <thread> and <future>
  • <tuple>
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This is my learning notes from the course - Mastering C++ Standard Library Features.

Passing Functions to Functions

• Higher-order functions
• Functions as arguments
• Functions pointers
• Template parameters
• std::function
• function_ref

Higher-Order Functions

Higher-order functions are functions that can either take other functions as arguments or return them as results.

– from Wikipedia - Higher-order function

First-class functions: https://en.wikipedia.org/wiki/First-class_function

This is my learning notes from the course - Mastering C++ Standard Library Features.

Storing Callable Objects

• Storing function objects and closures in variables
• Interactions between lambdas and function pointers
• The FunctionObject and Callable concepts
• std::function: Type erasure for Callable objects

Storing Functions in Variables

1

void foo() { std::cout << "hello!\n"; }

• Functions can be stored via function pointers

  1 2 3 4 5

  auto p0 = &foo; void(*p1)() = &foo; p0(); // prints "hello!" p1(); // prints "hello!"

  1	std::vector<void(*)()> vec{&foo};

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This is my learning notes from the course - Mastering C++ Standard Library Features.

Lambdas as First-Class Citizens

• What it means to be a “first-class citizen“
• How lambdas replace old Standard Library utilities
• Templates and lambda expressions
• Type-erasure for lambdas: std::function
• Higher-order functions

Lambdas: Versatile Tools

• Meaning of “first-class citizen“
• Standard Library utilities replaced by lambdas
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