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Remove @unavailable, and move to introducing basic (sham) parsing for @availability.

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The parsing here for @availability isn't real yet; but it provides
scaffolding.  Intended grammar:

  @availability(*, unavailable, message="...")
  @availability(*, unavailable)

  @availability(ios, unavailable)

  and so on.

Much of this doesn't work yet in a general way, but I wanted something
basic to work with to start with to wire up the functionality
for @availability end-to-end (at least for 'unavailable').

As part of this, extend DECL_ATTR to include whether or not an
attribute supports multiple declarations, and use this for
@availability.

Also hardwire darwin platforms, which we will need to have this
list come from somewhere.  The checking could be done at parsing
or elsewhere.

Swift SVN r15491
This commit is contained in:
Ted Kremenek
2014-03-26 06:51:15 +00:00
parent ce0c5899d8
commit 3f0ff8fa05
5 changed files with 180 additions and 51 deletions
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20
lib/AST/Attr.cpp
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@@ -101,12 +101,18 @@ void DeclAttribute::print(ASTPrinter &Printer) const {
case DAK_asmname:
Printer << "@asmname(\"" << cast<AsmnameAttr>(this)->Name << "\")";
break;
case DAK_unavailable: {
Printer << "@unavailable";
auto Attr = cast<UnavailableAttr>(this);
case DAK_availability: {
Printer << "@availability(";
auto Attr = cast<AvailabilityAttr>(this);
if (!Attr->hasPlatform())
Printer << '*';
else
Printer << Attr->Platform;
if (!Attr->Message.empty()) {
Printer << "(\"" << Attr->Message << "\")";
Printer << ", message=\""<< Attr->Message << "\"";
}
Printer << ')';
break;
}
case DAK_Count:
@@ -120,10 +126,10 @@ void DeclAttribute::print(llvm::raw_ostream &OS) const {
print(P);
}
unsigned DeclAttribute::canAppear() const {
switch (getKind()) {
unsigned DeclAttribute::getOptions(DeclAttrKind DK) {
switch (DK) {
case DAK_Count:
llvm_unreachable("canAppear needs a valid attribute");
llvm_unreachable("getOptions needs a valid attribute");
break;
#define DECL_ATTR(NAME, OPTIONS)\
case DAK_##NAME: return OPTIONS;