The review of SE-0028 "Modernizing Swift's Debugging Identifiers" ran from January 29… February 2, 2016. The proposal has been *accepted*, with modifications:
* The core team agrees that we should rename all of the existing __FILE__, __LINE__, __COLUMN__, __FUNCTION__, and __DSO_HANDLE__ symbols to lowercase equivalents in the # namespace: #file, #line, #column, #function, #dsohandle. This includes keeping __FUNCTION__, and making #line have the dual behavior of being a directive when it is the first token on a line, but an expression otherwise. Renaming these symbols improves uniformity within the Swift language, and keeping all of them provides a smooth transition path from the old syntax to the new syntax.
* The core team isn’t thrilled with the magic “first token on a line” whitespace behavior that #line will be getting, and would like someone to start a discussion about renaming the old #line directive to something more specific and tailored to its purpose. Once that name and syntax is settled, we can rename the directive and remove the whitespace rule.
* The core team requests that #symbol be split out into a separate proposal, because it needs more detailed design work, and is an additive feature. For example, it might be appealing to provide a "#mangledName” expression that provides the current symbol as a mangled name: when fed into a demangler, a more structured form of the current symbol would be available.
Thank you to Erica Sadun for driving this forward!