SE-0181 : should c++ be written "cxx" or "cpp" ?

adtrevor · 2017-07-12T17:21:14.000Z

Hello everyone,

After quickly reading "SE-0181: Package Manager C/C++ Language Standard Support" I noticed that as Swift doesn't support "+" sign in identifiers, the format "cxx" was used (as in "CXXLanguageStandard"), why isn't "cpp" used instead of "cxx" ?

Trevör

gparker42 · 2017-07-12T21:12:40.000Z

Several Swift developers came from clang, and clang uses "CXX" almost everywhere.

One reason for clang to use "CXX" is that "CPP" is historically also used for the C preprocessor. Using "CPP" for C++ would risk ambiguity.

···

On Jul 12, 2017, at 10:21 AM, Trevör ANNE DENISE via swift-evolution <swift-evolution@swift.org> wrote:

After quickly reading "SE-0181: Package Manager C/C++ Language Standard Support" I noticed that as Swift doesn't support "+" sign in identifiers, the format "cxx" was used (as in "CXXLanguageStandard"), why isn't "cpp" used instead of "cxx" ?

--
Greg Parker gparker@apple.com <mailto:gparker@apple.com> Runtime Wrangler

Chris_Lattner · 2017-07-12T22:59:47.000Z

Little known fact: + is just an x with the unicode 45° combining character applied to it. ;-)

-Chris

···

On Jul 12, 2017, at 2:21 PM, Greg Parker via swift-evolution <swift-evolution@swift.org> wrote:

On Jul 12, 2017, at 10:21 AM, Trevör ANNE DENISE via swift-evolution <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote:

After quickly reading "SE-0181: Package Manager C/C++ Language Standard Support" I noticed that as Swift doesn't support "+" sign in identifiers, the format "cxx" was used (as in "CXXLanguageStandard"), why isn't "cpp" used instead of "cxx" ?

Several Swift developers came from clang, and clang uses "CXX" almost everywhere.

adtrevor · 2017-07-13T11:47:02.000Z

T̠̃Hͤ̊͢Í̀S̡̤̣ M̡̌̃̃Å̤̃Ḳ̊Ě̀̊S Ṣ̡̣́E̤ͤÑ̠Ṣ̊̀̌Ẽ

···

Le 13 juil. 2017 à 00:59, Chris Lattner <clattner@nondot.org> a écrit :

On Jul 12, 2017, at 2:21 PM, Greg Parker via swift-evolution <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote:

On Jul 12, 2017, at 10:21 AM, Trevör ANNE DENISE via swift-evolution <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote:

After quickly reading "SE-0181: Package Manager C/C++ Language Standard Support" I noticed that as Swift doesn't support "+" sign in identifiers, the format "cxx" was used (as in "CXXLanguageStandard"), why isn't "cpp" used instead of "cxx" ?

Several Swift developers came from clang, and clang uses "CXX" almost everywhere.

Little known fact: + is just an x with the unicode 45° combining character applied to it. ;-)

-Chris

Jean-Daniel1 · 2017-07-14T10:48:00.000Z

Sorry to be pedantic, but this is not x, but × that is + with unicode 45° ;-)

···

Le 13 juil. 2017 à 00:59, Chris Lattner via swift-evolution swift-evolution@swift.org a écrit :

On Jul 12, 2017, at 2:21 PM, Greg Parker via swift-evolution swift-evolution@swift.org wrote:

On Jul 12, 2017, at 10:21 AM, Trevör ANNE DENISE via swift-evolution swift-evolution@swift.org wrote:

After quickly reading "SE-0181: Package Manager C/C++ Language Standard Support" I noticed that as Swift doesn't support "+" sign in identifiers, the format "cxx" was used (as in "CXXLanguageStandard"), why isn't "cpp" used instead of "cxx" ?

Several Swift developers came from clang, and clang uses "CXX" almost everywhere.

Little known fact: + is just an x with the unicode 45° combining character applied to it. ;-)