Don't emit warnings if specified at the command line or when working
on a non-primary input file.
https://bugs.swift.org/browse/SR-1012
rdar://problem/25282622
...because "build configuration" is already the name of an Xcode feature.
- '#if' et al are "conditional compilation directives".
- The condition is a "conditional compilation expression", or just
"condition" if it's obvious.
- The predicates are "platform conditions" (including 'swift(>=...)')
- The options set with -D are "custom conditional compilation flags".
(Thanks, Kevin!)
I left "IfConfigDecl" as is, as well as SourceKit's various "BuildConfig"
settings because some of them are part of the SourceKit request format.
We can change these in follow-up commits, or not.
rdar://problem/19812930
Parser may stop at some erroneous constructions like stray #else or #endif, in some cases closing brace ‘}’, etc…
continue parsing until we are done.
Swift SVN r24822
In most cases this means adding @public to things that get serialized;
in a few cases it means using a modern public stdlib API instead of
a legacy thing I was trying to keep @internal.
Swift SVN r19350
Also, don't allow file-relative imports (i.e. don't consider a /source file's/
location as an include path). Both of these should be requested by the user,
at least at this point.
Swift SVN r13249
