[swift-evolution] [Revision] SE-0034 - Disambiguating Line Control Statements from Debugging Identifiers

[Ben Rimmington]

> On 14 Mar 2016, at 22:30, Dave Abrahams via swift-evolution <swift-evolution at swift.org> wrote:
> 
> on Fri Mar 11 2016, Chris Lattner <swift-evolution at swift.org> wrote:
> 
>> This provides syntax that looks like an imperative function call that
>> affects the logical source location at that point in the file.
> 
> FWIW, to me it looks like a declarative statement about how the compiler
> should treat the following lines of source.  A name beginning with "set"
> would be more imperative, IMO.  I like declarative better.

Alternatives:

#openVirtualFile(...)
#closeVirtualFile(...)

#pragma openVirtualFile(...)
#pragma closeVirtualFile(...)

#if openVirtualFile(...)
#endif

Reference:

`Parser::parseLineDirective`
<https://github.com/apple/swift/blob/master/lib/Parse/ParseDecl.cpp#L2618>

-- Ben