Question

For example, for copy/paste purposes, it is very convenient to write :

C#

@"
SELECT * FROM ......
WHERE X = (SELECT Y FROM .....)
    AND M IN ('1','2','3')
";

or

Python:

"""
SELECT * FROM ......
WHERE X = (SELECT Y FROM .....)
    AND M IN ('1','2','3')
"""

than:

C++

"SELECT * FROM ...... \
WHERE X = (SELECT Y FROM .....) \
    AND M IN ('1','2','3')"

Is there any way to avoid the \ style in C++ and approach to C# or python style?

Thanks.

Answer 1

I think C++11 allows newlines in raw string literals, e.g.:

const char *query = R"(SELECT * FROM ...... 
                       WHERE X = (SELECT Y FROM .....) 
                       AND M IN ('1','2','3'))";

Each newline in the source should result in a newline in the execution string-literal. Raw string literals generally take the form of R"( ... )". For GCC this requires at least version 4.5, and for clang++, it requires version 3.0. Alternatively, you can use a custom delimiter to make it easier to disambiguate the end of the string:

const char *query = R"XXXX(SELECT * FROM ...... 
                       WHERE X = (SELECT Y FROM .....) 
                       AND M IN ('1','2','3'))XXXX";