STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, THE STANDARD : STANDARD C++ The standard is not intended to teach how to use C++. Rather, it is an international treaty – a formal, legal, and sometimes mind-numbingly detailed technical document intended primarily for people writing C++ compilers and standard library implementations. Fortunately, there RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

STANDARD C++

Yes! C++ is nearly exactly a superset of Standard C95 (C90 and the 1995 Amendment 1). With very few exceptions, every valid C95 program is also a valid C++ program with the same meaning. A great first step is to simply use C++ as “a better C,” which means that you can program in the C subset of C++ and find the experience better than in

C

STANDARD C++WHAT DO I NEED TO KNOW WHEN MIXING C AND C++ CODE?HERE ARE SOME HIGH POINTS (THOUGH SOME COMPILER-VENDORS MIGHT NOT REQUIRE ALL THESE; CHECK WITH YOUR COMPILER-VENDOR’SDOCUMENTATION): 1. YOU MUST U...HOW DO I CALL A C FUNCTION FROM C++?JUST DECLARE THE C FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:THE DEFINITIONS OF THE FUNCTIONS MAY L...HOW DO I CALL A C++ FUNCTION FROM C?JUST DECLARE THE C++ FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:NOW F() CAN BE USED LIKE THIS:NATURA...HOW CAN I INCLUDE A STANDARD C HEADER FILE IN MY C++ CODE?TO #INCLUDE A STANDARD HEADER FILE (SUCH AS ), YOU DON’T HAVE TO DO ANYTHING UNUSUAL. E.G.,IF YOU THINK THE STD:: PART OF THE STD::PRINTF()...HOW CAN I INCLUDE A NON-SYSTEM C HEADER FILE IN MY C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, YOU MAY NEED TO WRAP THE #INCLUDE LINE IN ANEXTERN "C" { /*...*/ } CONSTRUC...HOW CAN I MODIFY MY OWN C HEADER FILES SO IT’S EASIER TO #INCLUDE THEM IN C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, AND IF YOU ARE ABLE TO CHANGE THE C HEADER, YOUSHOULD STRONGLY CONSIDER ADD...HOW CAN I CALL A NON-SYSTEM C FUNCTION F(INT,CHAR,FLOAT) FROM MY C++ CODE?IF YOU HAVE AN INDIVIDUAL C FUNCTION THAT YOU WANT TO CALL, AND FOR SOME REASON YOU DON’T HAVE OR DON’T WANT TO#INCLUDE A C HEADER FILE IN WHICH TH...HOW CAN I CREATE A C++ FUNCTION F(INT,CHAR,FLOAT) THAT IS CALLABLE BY MY C CODE?THE C++ COMPILER MUST KNOW THAT F(INT,CHAR,FLOAT) IS TO BE CALLED BY A C COMPILER USING THE EXTERN "C"CONSTRUCT:THE EXTERN "C" LINE TELLS THE COMPI...WHY IS THE LINKER GIVING ERRORS FOR C/C++ FUNCTIONS BEING CALLED FROM C++/C FUNCTIONS?IF YOU DIDN’T GET YOUR EXTERN "C" RIGHT, YOU’LL SOMETIMES GET LINKER ERRORS RATHER THAN COMPILER ERRORS. THIS IS DUETO THE FACT THAT C++ COMPILERS...HOW CAN I PASS AN OBJECT OF A C++ CLASS TO/FROM A C FUNCTION?HERE’S AN EXAMPLE (FOR INFO ON EXTERN "C", SEE THE PREVIOUS TWO FAQS).FRED.H:FRED.CPP:MAIN.CPP:C-FUNCTION.C:UNLIKE YOUR C++ CODE,

YOUR C CODE WILL...

Since a C compiler won’t understand the extern "C" construct, you must wrap the extern "C" { and } lines in an #ifdef so they won’t be seen by normal C compilers. Step #1: Put the following lines at the very top of your C header file (note: the symbol __cplusplus is #define d if/only-if the compiler is a C++ compiler): C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think.

STANDARD C++

A class defines a data type, much like a struct would be in C. In a computer science sense, a type consists of both a set of states and a set of operations which transition between those states. Thus int is a type because it has both a set of states and it has operations like i + j or i++, etc. In exactly the same way, a class provides a set of

STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, THE STANDARD : STANDARD C++ The standard is not intended to teach how to use C++. Rather, it is an international treaty – a formal, legal, and sometimes mind-numbingly detailed technical document intended primarily for people writing C++ compilers and standard library implementations. Fortunately, there RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

STANDARD C++

Yes! C++ is nearly exactly a superset of Standard C95 (C90 and the 1995 Amendment 1). With very few exceptions, every valid C95 program is also a valid C++ program with the same meaning. A great first step is to simply use C++ as “a better C,” which means that you can program in the C subset of C++ and find the experience better than in

C

STANDARD C++WHAT DO I NEED TO KNOW WHEN MIXING C AND C++ CODE?HERE ARE SOME HIGH POINTS (THOUGH SOME COMPILER-VENDORS MIGHT NOT REQUIRE ALL THESE; CHECK WITH YOUR COMPILER-VENDOR’SDOCUMENTATION): 1. YOU MUST U...HOW DO I CALL A C FUNCTION FROM C++?JUST DECLARE THE C FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:THE DEFINITIONS OF THE FUNCTIONS MAY L...HOW DO I CALL A C++ FUNCTION FROM C?JUST DECLARE THE C++ FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:NOW F() CAN BE USED LIKE THIS:NATURA...HOW CAN I INCLUDE A STANDARD C HEADER FILE IN MY C++ CODE?TO #INCLUDE A STANDARD HEADER FILE (SUCH AS ), YOU DON’T HAVE TO DO ANYTHING UNUSUAL. E.G.,IF YOU THINK THE STD:: PART OF THE STD::PRINTF()...HOW CAN I INCLUDE A NON-SYSTEM C HEADER FILE IN MY C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, YOU MAY NEED TO WRAP THE #INCLUDE LINE IN ANEXTERN "C" { /*...*/ } CONSTRUC...HOW CAN I MODIFY MY OWN C HEADER FILES SO IT’S EASIER TO #INCLUDE THEM IN C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, AND IF YOU ARE ABLE TO CHANGE THE C HEADER, YOUSHOULD STRONGLY CONSIDER ADD...HOW CAN I CALL A NON-SYSTEM C FUNCTION F(INT,CHAR,FLOAT) FROM MY C++ CODE?IF YOU HAVE AN INDIVIDUAL C FUNCTION THAT YOU WANT TO CALL, AND FOR SOME REASON YOU DON’T HAVE OR DON’T WANT TO#INCLUDE A C HEADER FILE IN WHICH TH...HOW CAN I CREATE A C++ FUNCTION F(INT,CHAR,FLOAT) THAT IS CALLABLE BY MY C CODE?THE C++ COMPILER MUST KNOW THAT F(INT,CHAR,FLOAT) IS TO BE CALLED BY A C COMPILER USING THE EXTERN "C"CONSTRUCT:THE EXTERN "C" LINE TELLS THE COMPI...WHY IS THE LINKER GIVING ERRORS FOR C/C++ FUNCTIONS BEING CALLED FROM C++/C FUNCTIONS?IF YOU DIDN’T GET YOUR EXTERN "C" RIGHT, YOU’LL SOMETIMES GET LINKER ERRORS RATHER THAN COMPILER ERRORS. THIS IS DUETO THE FACT THAT C++ COMPILERS...HOW CAN I PASS AN OBJECT OF A C++ CLASS TO/FROM A C FUNCTION?HERE’S AN EXAMPLE (FOR INFO ON EXTERN "C", SEE THE PREVIOUS TWO FAQS).FRED.H:FRED.CPP:MAIN.CPP:C-FUNCTION.C:UNLIKE YOUR C++ CODE,

YOUR C CODE WILL...

Since a C compiler won’t understand the extern "C" construct, you must wrap the extern "C" { and } lines in an #ifdef so they won’t be seen by normal C compilers. Step #1: Put the following lines at the very top of your C header file (note: the symbol __cplusplus is #define d if/only-if the compiler is a C++ compiler): C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think.

STANDARD C++

A class defines a data type, much like a struct would be in C. In a computer science sense, a type consists of both a set of states and a set of operations which transition between those states. Thus int is a type because it has both a set of states and it has operations like i + j or i++, etc. In exactly the same way, a class provides a set of TRIP REPORT: SUMMER 2021 ISO C++ STANDARDS MEETING 1 day ago · Standards progress continues: Trip report: Summer 2021 ISO C++ standards meeting (virtual) by Herb Sutter. From the article: On Monday, the ISO C++ committee held its third full-committee (plenary) meeting of the pandemic and adopted a few more features and improvements for draft C++23 SUPER-FAQ : STANDARD C++ In part it’s because this is a merger of two great FAQs: Marshall Cline’s C++ FAQs, and Bjarne Stroustrup’s C++ FAQ. And in part it’s because this is a wiki being continuously updated for modern C++. There are some FAQ topics not yet updated; if you spot one,

suggest an

7 TOP TIPS FOR DEBUGGING C++--GREG LAW : STANDARD C++ How do you do it? 7 Top Tips for Debugging C++. by Greg Law. From the article: Brian Kernighan famously said, “Everyone knows that debugging is twice as hard as writing a A LIST OF BAD PRACTICES COMMONLY SEEN IN INDUSTRIAL 1 day ago · Are you in such an environement? A list of bad practices commonly seen in industrial projects. by Thomas Lourseyre. From the article: If you ever worked in a company-size software project (with numerous developers), there is a good chance that the codebase was, at least, pretty messy. DECENT CONCEPTS--ANDRZEJ KRZEMIEŃSKI : STANDARD C++ 1 day ago · Are you using concepts? Decent concepts. by Andrzej Krzemieński. From the article: Last year I published two posts on writing concepts: Concept Archetypes, THE COMMITTEE : STANDARD C++ The Committee. The Committee: WG21. The ISO C++ committee is called WG21, officially ISO/IEC JTC1 (Joint Technical Committee 1) / SC22 (Subcommittee 22) / WG21 (Working Group 21). WG21 was formed in 1990-91, and consists of accredited experts from member nations of ISO/IEC JTC1/SC22 who are interested in C++ work.

STANDARD C++

The common subset of C and C++ is easier to learn than C. There will be less type errors to catch manually (the C++ type system is stricter and more expressive), fewer tricks to learn (C++ allows you to express more things without circumlocution), and better libraries available. The best initial subset of C++ to learn is not “all of C”.

: STANDARD C++

Compile-time pre-calculations in C++--Mohammad Nasirifar. By Adrien Hamelin | May 31, 2021 02:30 PM | Tags: performance The evolution.

: STANDARD C++

Report from the virtual ISO C++ meetings in 2020 (core language)--Jason Merrill. By Adrien Hamelin | May 13, 2021 12:53 PM | Tags: community Did you attend?

: STANDARD C++

CopperSpice: Static Things. By Ansel Sermersheim | May 28, 2021 02:22 PM | Tags: None New video on the CopperSpice YouTube Channel:

STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, THE STANDARD : STANDARD C++ The standard is not intended to teach how to use C++. Rather, it is an international treaty – a formal, legal, and sometimes mind-numbingly detailed technical document intended primarily for people writing C++ compilers and standard library implementations. Fortunately, there RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

STANDARD C++

Yes! C++ is nearly exactly a superset of Standard C95 (C90 and the 1995 Amendment 1). With very few exceptions, every valid C95 program is also a valid C++ program with the same meaning. A great first step is to simply use C++ as “a better C,” which means that you can program in the C subset of C++ and find the experience better than in

C

STANDARD C++WHAT DO I NEED TO KNOW WHEN MIXING C AND C++ CODE?HERE ARE SOME HIGH POINTS (THOUGH SOME COMPILER-VENDORS MIGHT NOT REQUIRE ALL THESE; CHECK WITH YOUR COMPILER-VENDOR’SDOCUMENTATION): 1. YOU MUST U...HOW DO I CALL A C FUNCTION FROM C++?JUST DECLARE THE C FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:THE DEFINITIONS OF THE FUNCTIONS MAY L...HOW DO I CALL A C++ FUNCTION FROM C?JUST DECLARE THE C++ FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:NOW F() CAN BE USED LIKE THIS:NATURA...HOW CAN I INCLUDE A STANDARD C HEADER FILE IN MY C++ CODE?TO #INCLUDE A STANDARD HEADER FILE (SUCH AS ), YOU DON’T HAVE TO DO ANYTHING UNUSUAL. E.G.,IF YOU THINK THE STD:: PART OF THE STD::PRINTF()...HOW CAN I INCLUDE A NON-SYSTEM C HEADER FILE IN MY C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, YOU MAY NEED TO WRAP THE #INCLUDE LINE IN ANEXTERN "C" { /*...*/ } CONSTRUC...HOW CAN I MODIFY MY OWN C HEADER FILES SO IT’S EASIER TO #INCLUDE THEM IN C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, AND IF YOU ARE ABLE TO CHANGE THE C HEADER, YOUSHOULD STRONGLY CONSIDER ADD...HOW CAN I CALL A NON-SYSTEM C FUNCTION F(INT,CHAR,FLOAT) FROM MY C++ CODE?IF YOU HAVE AN INDIVIDUAL C FUNCTION THAT YOU WANT TO CALL, AND FOR SOME REASON YOU DON’T HAVE OR DON’T WANT TO#INCLUDE A C HEADER FILE IN WHICH TH...HOW CAN I CREATE A C++ FUNCTION F(INT,CHAR,FLOAT) THAT IS CALLABLE BY MY C CODE?THE C++ COMPILER MUST KNOW THAT F(INT,CHAR,FLOAT) IS TO BE CALLED BY A C COMPILER USING THE EXTERN "C"CONSTRUCT:THE EXTERN "C" LINE TELLS THE COMPI...WHY IS THE LINKER GIVING ERRORS FOR C/C++ FUNCTIONS BEING CALLED FROM C++/C FUNCTIONS?IF YOU DIDN’T GET YOUR EXTERN "C" RIGHT, YOU’LL SOMETIMES GET LINKER ERRORS RATHER THAN COMPILER ERRORS. THIS IS DUETO THE FACT THAT C++ COMPILERS...HOW CAN I PASS AN OBJECT OF A C++ CLASS TO/FROM A C FUNCTION?HERE’S AN EXAMPLE (FOR INFO ON EXTERN "C", SEE THE PREVIOUS TWO FAQS).FRED.H:FRED.CPP:MAIN.CPP:C-FUNCTION.C:UNLIKE YOUR C++ CODE,

YOUR C CODE WILL...

Since a C compiler won’t understand the extern "C" construct, you must wrap the extern "C" { and } lines in an #ifdef so they won’t be seen by normal C compilers. Step #1: Put the following lines at the very top of your C header file (note: the symbol __cplusplus is #define d if/only-if the compiler is a C++ compiler): C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think.

STANDARD C++

A class defines a data type, much like a struct would be in C. In a computer science sense, a type consists of both a set of states and a set of operations which transition between those states. Thus int is a type because it has both a set of states and it has operations like i + j or i++, etc. In exactly the same way, a class provides a set of

STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, THE STANDARD : STANDARD C++ The standard is not intended to teach how to use C++. Rather, it is an international treaty – a formal, legal, and sometimes mind-numbingly detailed technical document intended primarily for people writing C++ compilers and standard library implementations. Fortunately, there RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

STANDARD C++

Yes! C++ is nearly exactly a superset of Standard C95 (C90 and the 1995 Amendment 1). With very few exceptions, every valid C95 program is also a valid C++ program with the same meaning. A great first step is to simply use C++ as “a better C,” which means that you can program in the C subset of C++ and find the experience better than in

C

STANDARD C++WHAT DO I NEED TO KNOW WHEN MIXING C AND C++ CODE?HERE ARE SOME HIGH POINTS (THOUGH SOME COMPILER-VENDORS MIGHT NOT REQUIRE ALL THESE; CHECK WITH YOUR COMPILER-VENDOR’SDOCUMENTATION): 1. YOU MUST U...HOW DO I CALL A C FUNCTION FROM C++?JUST DECLARE THE C FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:THE DEFINITIONS OF THE FUNCTIONS MAY L...HOW DO I CALL A C++ FUNCTION FROM C?JUST DECLARE THE C++ FUNCTION EXTERN "C" (IN YOUR C++ CODE) AND CALL IT (FROM YOUR C OR C++ CODE). FOR EXAMPLE:NOW F() CAN BE USED LIKE THIS:NATURA...HOW CAN I INCLUDE A STANDARD C HEADER FILE IN MY C++ CODE?TO #INCLUDE A STANDARD HEADER FILE (SUCH AS ), YOU DON’T HAVE TO DO ANYTHING UNUSUAL. E.G.,IF YOU THINK THE STD:: PART OF THE STD::PRINTF()...HOW CAN I INCLUDE A NON-SYSTEM C HEADER FILE IN MY C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, YOU MAY NEED TO WRAP THE #INCLUDE LINE IN ANEXTERN "C" { /*...*/ } CONSTRUC...HOW CAN I MODIFY MY OWN C HEADER FILES SO IT’S EASIER TO #INCLUDE THEM IN C++ CODE?IF YOU ARE INCLUDING A C HEADER FILE THAT ISN’T PROVIDED BY THE SYSTEM, AND IF YOU ARE ABLE TO CHANGE THE C HEADER, YOUSHOULD STRONGLY CONSIDER ADD...HOW CAN I CALL A NON-SYSTEM C FUNCTION F(INT,CHAR,FLOAT) FROM MY C++ CODE?IF YOU HAVE AN INDIVIDUAL C FUNCTION THAT YOU WANT TO CALL, AND FOR SOME REASON YOU DON’T HAVE OR DON’T WANT TO#INCLUDE A C HEADER FILE IN WHICH TH...HOW CAN I CREATE A C++ FUNCTION F(INT,CHAR,FLOAT) THAT IS CALLABLE BY MY C CODE?THE C++ COMPILER MUST KNOW THAT F(INT,CHAR,FLOAT) IS TO BE CALLED BY A C COMPILER USING THE EXTERN "C"CONSTRUCT:THE EXTERN "C" LINE TELLS THE COMPI...WHY IS THE LINKER GIVING ERRORS FOR C/C++ FUNCTIONS BEING CALLED FROM C++/C FUNCTIONS?IF YOU DIDN’T GET YOUR EXTERN "C" RIGHT, YOU’LL SOMETIMES GET LINKER ERRORS RATHER THAN COMPILER ERRORS. THIS IS DUETO THE FACT THAT C++ COMPILERS...HOW CAN I PASS AN OBJECT OF A C++ CLASS TO/FROM A C FUNCTION?HERE’S AN EXAMPLE (FOR INFO ON EXTERN "C", SEE THE PREVIOUS TWO FAQS).FRED.H:FRED.CPP:MAIN.CPP:C-FUNCTION.C:UNLIKE YOUR C++ CODE,

YOUR C CODE WILL...

Since a C compiler won’t understand the extern "C" construct, you must wrap the extern "C" { and } lines in an #ifdef so they won’t be seen by normal C compilers. Step #1: Put the following lines at the very top of your C header file (note: the symbol __cplusplus is #define d if/only-if the compiler is a C++ compiler): C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think.

STANDARD C++

A class defines a data type, much like a struct would be in C. In a computer science sense, a type consists of both a set of states and a set of operations which transition between those states. Thus int is a type because it has both a set of states and it has operations like i + j or i++, etc. In exactly the same way, a class provides a set of TRIP REPORT: SUMMER 2021 ISO C++ STANDARDS MEETING 1 day ago · Standards progress continues: Trip report: Summer 2021 ISO C++ standards meeting (virtual) by Herb Sutter. From the article: On Monday, the ISO C++ committee held its third full-committee (plenary) meeting of the pandemic and adopted a few more features and improvements for draft C++23 SUPER-FAQ : STANDARD C++ In part it’s because this is a merger of two great FAQs: Marshall Cline’s C++ FAQs, and Bjarne Stroustrup’s C++ FAQ. And in part it’s because this is a wiki being continuously updated for modern C++. There are some FAQ topics not yet updated; if you spot one,

suggest an

7 TOP TIPS FOR DEBUGGING C++--GREG LAW : STANDARD C++ How do you do it? 7 Top Tips for Debugging C++. by Greg Law. From the article: Brian Kernighan famously said, “Everyone knows that debugging is twice as hard as writing a A LIST OF BAD PRACTICES COMMONLY SEEN IN INDUSTRIAL 1 day ago · Are you in such an environement? A list of bad practices commonly seen in industrial projects. by Thomas Lourseyre. From the article: If you ever worked in a company-size software project (with numerous developers), there is a good chance that the codebase was, at least, pretty messy. DECENT CONCEPTS--ANDRZEJ KRZEMIEŃSKI : STANDARD C++ 1 day ago · Are you using concepts? Decent concepts. by Andrzej Krzemieński. From the article: Last year I published two posts on writing concepts: Concept Archetypes, THE COMMITTEE : STANDARD C++ The Committee. The Committee: WG21. The ISO C++ committee is called WG21, officially ISO/IEC JTC1 (Joint Technical Committee 1) / SC22 (Subcommittee 22) / WG21 (Working Group 21). WG21 was formed in 1990-91, and consists of accredited experts from member nations of ISO/IEC JTC1/SC22 who are interested in C++ work.

STANDARD C++

The common subset of C and C++ is easier to learn than C. There will be less type errors to catch manually (the C++ type system is stricter and more expressive), fewer tricks to learn (C++ allows you to express more things without circumlocution), and better libraries available. The best initial subset of C++ to learn is not “all of C”.

: STANDARD C++

Compile-time pre-calculations in C++--Mohammad Nasirifar. By Adrien Hamelin | May 31, 2021 02:30 PM | Tags: performance The evolution.

: STANDARD C++

Report from the virtual ISO C++ meetings in 2020 (core language)--Jason Merrill. By Adrien Hamelin | May 13, 2021 12:53 PM | Tags: community Did you attend?

: STANDARD C++

CopperSpice: Static Things. By Ansel Sermersheim | May 28, 2021 02:22 PM | Tags: None New video on the CopperSpice YouTube Channel:

STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. SOLVING THE STATIC INITIALIZATION ORDER FIASCO WITH C++20 Solving the Static Initialization Order Fiasco with C++20. by Rainer Grimm. From the article: According to the FAQ of isocpp.org is the static initialization order fiasco “a subtle way to crash your program”. The FAQ continues: The static initialization order problem is a very subtle and commonly misunderstood aspect of C++. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think. THE C++ LIFETIME PROFILE: HOW IT PLANS TO MAKE C++ CODE The C++ Lifetime Profile: How It Plans to Make C++ Code Safer. From the article: High amounts of low-level systems are written in C++. Memory access in C++ is virtually unrestricted, which means that bugs in C++ programs can corrupt it and cause crashes or security problems. For this reason, we call C++ a memory-unsafe programming language LIBSTUDXML: A MODERN XML API FOR C++ : STANDARD C++ libstudxml: A modern XML API for C++. libstudxml is an XML library for modern, standard C++. It has an API that I believe should have already been in Boost or even in the C++ standard library. The API was first presented at the C++Now 2014 conference. Based on the positive feedback and encouragement I received during the talk, I’ve decided

to

SG14 : STANDARD C++

sg14 SG14 (the GameDev & low latency ISO C++ working group) - Guy Davidson - Meeting C++ 2016. By Meeting C++ | Jan 13, 2017 07:08 AM | Tags: sg14 intermediate gamedev basics A short talk on what SG14 is

doing

STANDARD C++

Recent CppCast Podcasts Feed. Event Streaming Date: Fri, 19 Mar 2021 00:00:00 +0000 ; Reducing Memory Allocations Date: Fri, 12 Mar 2021 00:00:00 +0000 ; The Old New Thing Date: Fri, 05 Mar 2021 00:00:00 +0000 ; Vcpkg Registries Date: Fri, 26 Feb 2021 00:00:00 +0000 ; Recent Cpp.Chat Podcasts Feed. The Answer Is, It Depends Date: Tue, 20 Apr 2021 00:00:00 ; Required to Warn You, RESULTS SUMMARY: 2021 ANNUAL C++ DEVELOPER SURVEY "LITE Over the past week, we ran our 2021 annual global C++ developer survey. Thank you to everyone who responded. As promised, here is a summary of the results: CppDevSurvey-2021-04-summary.pdf. The results have now been forwarded to the C++ COROUTINES SERIES--RAYMOND CHEN : STANDARD C++ As we learned in the very start of the series on coroutines, the await_suspend method cannot access the coroutine frame once it arranges for the coroutine to resume because that creates a race condition where the coroutine might already be resumed and possibly even run to completion before await_suspend finishes. by Raymond Chen. SOLVING THE STATIC INITIALIZATION ORDER FIASCO WITH C++20 Solving the Static Initialization Order Fiasco with C++20. by Rainer Grimm. From the article: According to the FAQ of isocpp.org is the static initialization order fiasco “a subtle way to crash your program”. The FAQ continues: The static initialization order problem is a very subtle and commonly misunderstood aspect of C++. 2021-01 MAILING AVAILABLE : STANDARD C++ The 2021-01 mailing of new standards papers is now available. WG21 Number. Title. Author. Document Date. Mailing Date. Previous Version.

Subgroup. P0447R12.

FUNCTION TEMPLATES

The series continue. Function Templates - More Details about Explicit Template Arguments and Concepts. by Rainer Grimm. From the article: In the last post "Function Templates", I wrote about the overloading of function templates and automatically deducing the return type of a

function template.

C++ COROUTINES: HOW DO I CREATE A COROUTINE THAT The series continue. C++ coroutines: How do I create a coroutine that terminates on an unhandled exception? by Raymond Chen. From the article: Last time, we saw that declaring a coroutine as noexcept doesn’t do what you think. THE C++ LIFETIME PROFILE: HOW IT PLANS TO MAKE C++ CODE The C++ Lifetime Profile: How It Plans to Make C++ Code Safer. From the article: High amounts of low-level systems are written in C++. Memory access in C++ is virtually unrestricted, which means that bugs in C++ programs can corrupt it and cause crashes or security problems. For this reason, we call C++ a memory-unsafe programming language LIBSTUDXML: A MODERN XML API FOR C++ : STANDARD C++ libstudxml: A modern XML API for C++. libstudxml is an XML library for modern, standard C++. It has an API that I believe should have already been in Boost or even in the C++ standard library. The API was first presented at the C++Now 2014 conference. Based on the positive feedback and encouragement I received during the talk, I’ve decided

to

SG14 : STANDARD C++

sg14 SG14 (the GameDev & low latency ISO C++ working group) - Guy Davidson - Meeting C++ 2016. By Meeting C++ | Jan 13, 2017 07:08 AM | Tags: sg14 intermediate gamedev basics A short talk on what SG14 is

doing

TRIP REPORT: SUMMER 2021 ISO C++ STANDARDS MEETING Standards progress continues: Trip report: Summer 2021 ISO C++ standards meeting (virtual) by Herb Sutter. From the article: On Monday, the ISO C++ committee held its third full-committee (plenary) meeting of the pandemic and adopted a few more features and improvements for draft C++23 7 TOP TIPS FOR DEBUGGING C++--GREG LAW : STANDARD C++ How do you do it? 7 Top Tips for Debugging C++. by Greg Law. From the article: Brian Kernighan famously said, “Everyone knows that debugging is twice as hard as writing a A LIST OF BAD PRACTICES COMMONLY SEEN IN INDUSTRIAL 4 hours ago · Are you in such an environement? A list of bad practices commonly seen in industrial projects. by Thomas Lourseyre. From the article: If you ever worked in a company-size software project (with numerous developers), there is a good chance that the codebase was, at least, pretty messy. DECENT CONCEPTS--ANDRZEJ KRZEMIEŃSKI : STANDARD C++ 3 hours ago · Are you using concepts? Decent concepts. by Andrzej Krzemieński. From the article: Last year I published two posts on writing concepts: Concept Archetypes, “PROFESSIONAL C++, 5TH EDITION” RELEASED--MARC GREGOIRE Interested to read it? “Professional C++, 5th Edition” Released. by Marc Gregoire. From the article: After working on it for a year, I’m proud to announce my new book “Professional C++, 5th Edition” is finished ������ It has been updated to the C++20 standard and uses certain C++20 features, such as modules and std::format(), throughout all examples

: STANDARD C++

Compile-time pre-calculations in C++--Mohammad Nasirifar. By Adrien Hamelin | May 31, 2021 02:30 PM | Tags: performance The evolution.

: STANDARD C++

Report from the virtual ISO C++ meetings in 2020 (core language)--Jason Merrill. By Adrien Hamelin | May 13, 2021 12:53 PM | Tags: community Did you attend?

: STANDARD C++

Surprise Included: Inheritance and Member Functions of Class Templates--Rainer Grimm. By Adrien Hamelin | Jun 7, 2021 12:26 PM | Tags: intermediate Back to the basics.

: STANDARD C++

CopperSpice: Static Things. By Ansel Sermersheim | May 28, 2021 02:22 PM | Tags: None New video on the CopperSpice YouTube Channel: CODE QUALITY : STANDARD C++ code quality PVS-Studio 7.12 New Features for Finding Safety and Security Threats. By Andrey Karpov | Mar 12, 2021 01:06 AM | Tags: static analyzer sei cert security sast safety pvs-studio owasp top 10 owasp misra c++ misra devsecops code quality autosar c++14 autosar At the moment, PVS-Studio is developing not only as a static analyzer searching for code quality defects (quality control

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