While in C, and derived languages, it is legal to concatenate two literals by putting them next to each other, this is only justified in a few
cases. For instance if one is a macro or if the layout makes it clearer.
Noncompliant code example
const char * v1 = "a""b"; // Noncompliant; same as "ab"
const char * v2 = "a\n" "b\n"; // Noncompliant
Compliant solution
const char * v1 = "ab"
const char * v2 = "a\n"
"b\n";
Exceptions
const char * v3 = "a" /* comment */ "b";
#define _s "b"
const char * v4 = "a" _s; // concatenation with macro ignored
