On Thu, Mar 25, 2021 at 4:34 PM Tom Honermann <tom@honermann.net> wrote:

There are two CWG issues related to this:

• CWG #1655: Line endings in raw string literals

It looks like the current text addresses this.  From 1655 "Is it intended that, for example, a CRLF in the source of a raw string literal is to be represented as a newline character or as the original characters?"
From the current draft: http://eel.is/c++draft/lex.string#4

[Note 2: 

A source-file new-line in a raw string literal results in a new-line in the resulting execution string literal.

 

Assuming no whitespace at the beginning of lines in the following example, the assert will succeed:const char* p = R"(a\ b c)"; assert(std::strcmp(p, "a\\\nb\nc") == 0);

— end note]

It does look that way, but this wording also predates the core issue.  Perhaps that wording went unnoticed when the issue was recorded.  I did some brief tests and, assuming I didn't mess it up, it looks like the assert passes for gcc (9.1), Clang (7.0), and Visual C++ (2019 16.7) when presented a source file with CRLF line endings.  Perhaps this issue can be resolved as NAD.  I sent a message to CWG.

Tom.