Two of the biggest features added to C++11 were auto type deduction and uniform list initialization. Troy explains both of them and what is the best way to use them.
- [Instructor] The keyword auto tells a compiler…to deduce the type of variable…by the expression used to initialize it.…Unlike other types,…auto requires the variable to be initialized,…so there's no chance of a variable…running around uninitialized,…preventing a difficult-to-find bug.…Auto also helps us to write our code to interfaces…and not to implementations, avoiding tight coupling.…If you need a specific type,…you can use auto with type initialization.…Let's take a look at a few examples.…
Let's try to create a vector event.…First, we initialize alpha to a vector event…with the values one, two, and three.…We try to do something similar with auto…but we get a syntax error.…Since initialization of auto…expects one expression, not three.…We then try to declare gamma…with auto and an initializer list.…The compiler is okay with it, but we created a variable…of type initialize list event, not vector event.…
Then we defined delta with a vector event…and an initialize list, that works,…and gives us what we were looking for.…
Author
Released
12/6/2018- Major new C++ features
- Turning on modern C++
- Letting the compiler help
- Using the new features correctly
- Using auto type deduction
- Using lambdas
- Range-based for loops
- How C++ and the Standard Template Library name things
- Making the best of the filesystem library
- Managing objects
Skill Level Beginner
Duration
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Introduction
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1. What Is Modern C++?
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New C++ features56s
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Old code compatibility1m 1s
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2. Tools That Improve Your Code
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Let the compiler help1m 4s
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Static analyzers1m 3s
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Cppcheck4m 40s
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3. Using the New Features Correctly
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Range-based for loops1m 45s
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Strongly typed enums1m 58s
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Using lambdas2m 39s
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4. Don't Reinvent the Wheel
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Map, filter, and reduce4m 30s
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size_t and auto2m 38s
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The filesystem library4m 15s
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5. Managing Objects
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Challenge: RAII31s
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Solution: RAII2m 6s
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Conclusion
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Next steps42s
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Video: Auto type deduction and initialization