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Expand comment on std::string operator+

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Nuts!

Change-Id: Ib5bc0606d7c86e57ef76dd7bcc89dce91bd3d50a
This commit is contained in:
Rebecca Turner 2024-09-01 15:10:31 -07:00
parent 02eb07cfd5
commit 9d8f433246
Signed by: rbt
SSH key fingerprint: SHA256:HU9KTlGeHEBIp12MT4UHG0uc//NRNoJMWfzVGX3igu4
1 changed files with 11 additions and 1 deletions
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12
src/libutil/strings.hh
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@ -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. * 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) inline std::string operator + (const std::string & s1, std::string_view s2)
{ {