CMake.git - CMake is a cross-platform, open-source build system generator.

	Commit message (Collapse)	Author	Age	Files	Lines
*	String: Add str_if_stable() as a const alternative to str()	Brad King	2018-12-12	1	-3/+24
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	The `str()` method must be non-const because it may need to internally mutate the representation of the string in order to have an owned `std::string` instance holding the exact string (not a superstring). This is inconvenient in contexts where we can ensure that no mutation is needed to get a `std::string const&`. Add a `str_if_stable() const` method that returns `std::string const` so we can return `nullptr` if if mutation would be necessary to get a `std::string const&`. Add supporting `is_stable() const` and `stabilize()` methods to check and enforce stable availability of `std::string const&`. These can be used to create `String const` instances from which we can still get a `std::string const&` via `str_if_stable()` by maintaining the stability invariant at runtime.
*	String: Add a custom string type	Brad King	2018-12-12	1	-0/+131
	Create a `cm::String` type that holds a view of a string buffer and optionally shares ownership of the buffer. Instances can either borrow longer-lived storage (e.g. static storage of string literals) or internally own a `std::string` instance. In the latter case, share ownership with copies and substrings. Allocate a new internal string only on operations that require mutation. This will allow us to recover string sharing semantics that we used to get from C++98 std::string copy-on-write implementations. Such implementations are not allowed by C++11 so code our own in a custom string type instead.