Modern and Lucid C++ Advanced for Professional Programmers ... · Modul: C++ Advanced (M_CPlA) 4...

Thomas Corbat / Prof. Peter Sommerlad

Rapperswil, 23.2.2018

HS2018

Department I - C Plus Plus

Modern and Lucid C++ Advanced

for Professional Programmers

Part 0 - Introduction

Modul: C++ Advanced (M_CPlA)

4 Credits (2h Vorlesung / 2h Übungen pro Woche)

Testate

3 Abgaben (Zeitpunkt wird bei Bedarf noch angepasst)

Keine Note

Zulassungsbedingung für die Prüfung

Prüfung

120 Minuten

Open Book (Ausnahme alte Prüfungen oder Abschriften davon)

2

Administratives

Wiki: https://wiki.ifs.hsr.ch/CppAdvanced

Wichtig: https!

Austausch von nicht öffentlichen Inhalten über Skripte-Server:

https://skripte.hsr.ch/Informatik/Fachbereich/C++_Advanced/CplA/

\\hsr.ch\root\alg\skripte\Informatik\Fachbereich\C++_Advanced\CplA

Arbeitsumgebung (Vorläufig)

Aktueller Compiler (GCC 7.2.0+): Windows MinGW von https://sourceforge.net/projects/mingw-w64/

VM vom C++ Modul ist verfügbar – nicht aktualisiert

Cevelop (www.cevelop.com)

An Karfreitag kein Unterricht: 30.03.2018

3

Why C++ Advanced?

What is your motivation?

What are your expectations?

4

Topics

Short refresh of C++ topics

New Features in C++17

Move semantics and type deduction

Low level memory management

Compile-time C++

Multi-Threading / Memory Model

Advanced Libraries/Development

Handling Legacy C++

Maybe more

5

Exercises

Typical tasks known from C++

One specific exercise that will be part of several exercises

Bounded Buffer

Start with a simple std::array-based version that will be extended every week

Parts of it will be Testat

6

Cevelop 1.9.1 with Constificator and Ctylechecker

Get Cevelop

at https://www.cevelop.com/download

Install the additional plug-ins Constificator and Ctylechecker

Update site (already configured in Cevelop): https://www.cevelop.com/update/1.9.0

7

Const Placement in Cevelop

Unfortunately, there are still some bugs which prevent const placement to be considered for code

generation

ctrl + shift + a might do the trick

8

Why Place const Right of the Type? (1/2)

const int seems to be more intuitive since it is how you would say the type of ci and ic...

That's is probably the reason why it usually stands on the left

Let's have a look at pointers

We read pointers from the declarator (i.e. right-to-left)

9

int i;const int ci;int const ic;

ci and ic have type

"const int"

int * ip;const int * cip;int const * icp;int * const ipc;const int * const cipc;int const * const icpc;

cicp and icpc have type "const pointer to const int"

Why Place const Right of the Type? (2/2)

Do ca and ac have the same type?

Yes, what is the type?

int * const

It is not only for reading consistency but also for semantic consistency!

10

using alias = int *;

const alias ca;alias const ac;

const applies to its left neighbor; only if there is no left neighbor it applies to its right neighbor

int const * const

const int * cip;int * const ipc;

?

Confusing Mix of mutable and const

The mutable specifier refers to the declared name

What does the following mean?

const makes the pointee int immutable

mutable makes the pointer mutable

When does this make sense? Shouldn't the non-const mutable_const_int_pointer always be

mutable?

11

mutable const int * mutable_const_int_pointer;

Features of Cevelop (Constificator)

Constificator

If activated

Makes suggestions about missing const qualifiers

12

What does Ctylechecker do?

It annoys you in the first place!

When you have multiple ASSERTs in your test cases

When you use std::cin/std::cout outside of the main function

When there are issues with your include guard

13

Hey Apple!

What does Ctylechecker do?

and reports...

... global non-const variables

... missing includes of Standard Library headers and provides a resolution!

... unused includes of Standard Library headers

14

15(New) Features of Cevelop (Templator/Includator)

Template Instance Visualization

New version coming soon

Include Organization

15

16Cevelop 1.9.0 New Project Wizard

Eclipse CDT 9.4 features a new wizard page

for creating new projects

With "C++ Managed Build" you can get to the

familiar wizard

16

17Configure Cevelop for C++17 (Cevelop <= 1.9.0) 17

Resilience Required

You might encounter several bugs in Cevelop and its plug-ins (more than in CPl)

We are using modern and sophisticated features of C++17, which are not completely supported yet

When in doubt ask your compiler

When in more doubt ask several compilers

http://melpon.org/wandbox

https://gcc.godbolt.org/

18