Unlike other prefix operators, unary minus is folded into the
NumberLiteralExpr in the parser. This commit recreates this effect in
the lexer-based syntax map so that token ranges will include the leading
minus.
rdar://problem/20205885
This adds some heuristics so we can emit a fixit to remove extraneous
whitespace after a . and diagnose the case where a member just hasn't
been written yet better. This also improves handling of tok::unknown
throughout the parser a bit.
This is a re-commit of ff4ea54 with an update for a SourceKit test.
The code goes into its own sub-tree under 'tools' but tests go under 'test',
so that running 'check-swift' will also run all the SourceKit tests.
SourceKit is disabled on non-darwin platforms.
