== Why is this an issue?

{cpp} allows you to append a macro value onto the end of a string literal. Prior to {cpp}11, it was possible to do this either with or without a space between the two. But with the introduction of user-defined literals in {cpp}11, the preprocessing of string suffixes changed. To get the same string + macro behavior under {cpp} 11, you must separate the string literal and the macro with a space. Without the space, you'll get a compile error.


For the purpose of preparing for migration to {cpp}11, this rule raises an issue when there's no space between a string literal and a macro.


=== Noncompliant code example

[source,cpp]
----
#define _Hrs " hours"
static const char* OPENING = "7"_Hrs; // Noncompliant
----


=== Compliant solution

[source,cpp]
----
#define _Hrs " hours"
static const char* OPENING = "7" _Hrs; // there's one space after "7"
----



ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

=== Message

Add a space after this string literal.


=== Highlighting

string literal


'''
== Comments And Links
(visible only on this page)

=== on 26 Jul 2016, 16:07:20 Ann Campbell wrote:
I've made a few more changes [~alban.auzeill]

endif::env-github,rspecator-view[]