diff options
| -rw-r--r-- | src/libutil/strings.hh | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/libutil/strings.hh b/src/libutil/strings.hh index ebafab9ad..782807b61 100644 --- a/src/libutil/strings.hh +++ b/src/libutil/strings.hh @@ -200,8 +200,18 @@ std::string showBytes(uint64_t bytes); /** - * Provide an addition operator between strings and string_views + * Provide an addition operator between `std::string` and `std::string_view` * inexplicably omitted from the standard library. + * + * > The reason for this is given in n3512 string_ref: a non-owning reference + * to a string, revision 2 by Jeffrey Yasskin: + * > + * > > I also omitted operator+(basic_string, basic_string_ref) because LLVM + * > > returns a lightweight object from this overload and only performs the + * > > concatenation lazily. If we define this overload, we'll have a hard time + * > > introducing that lightweight concatenation later. + * + * See: https://stackoverflow.com/a/47735624 */ inline std::string operator + (const std::string & s1, std::string_view s2) { |