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Class Template Argument Deduction in C++17

ACCU Conference via YouTube

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Overview

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This course explains C++17 class template argument deduction and its interaction with the standard library and custom classes. It covers user-defined deduction guides, language rules, and pitfalls such as surprising or unsafe deductions.

Syllabus

Intro
template argument deduction in C++98
vector
pitfall!
magic!
trap #1: the order matters
trap #2: list-initialisation has priority
sequence containers
map
locks & mutexes
example with no arguments
other STL classes...
smart pointers
how to disable CTAD
type identity idiom
member typedef
templated ctor
std: function
deduction guides SFINAE
aggregates need explicit guides
CTAD uses the primary template
CTAD not just in declarations!
no CTAD in nested types
CTAD + smart pointer conversions

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ACCU Conference

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