Merge pull request #65363 from DougGregor/macro-compound-introduced-names-5.9

[5.9] [Macros] Improve parsing, representation, and serialization of role attributes

Author: DougGregor

include/swift/AST/DiagnosticsParse.def

@@ -2028,8 +2028,6 @@ ERROR(foreign_diagnostic,none,
 //------------------------------------------------------------------------------
 // MARK: macros
 //------------------------------------------------------------------------------
-ERROR(expected_macro_value_type,PointsToFirstBadToken,
-      "expected macro value type following ':'", ())
 ERROR(expected_lparen_macro,PointsToFirstBadToken,
       "expected '(' for macro parameters or ':' for a value-like macro", ())
 ERROR(expected_type_macro_result,PointsToFirstBadToken,
@@ -2042,12 +2040,13 @@ ERROR(macro_expansion_expr_expected_macro_identifier,PointsToFirstBadToken,
 ERROR(macro_expansion_decl_expected_macro_identifier,PointsToFirstBadToken,
       "expected a macro identifier for a pound literal declaration", ())
 
-ERROR(declaration_attr_expected_kind,PointsToFirstBadToken,
-      "expected a declaration macro kind ('freestanding' or 'attached')", ())
-
 ERROR(macro_role_attr_expected_kind,PointsToFirstBadToken,
       "expected %select{a freestanding|an attached}0 macro role such as "
       "%select{'expression'|'accessor'}0", (bool))
+ERROR(macro_role_attr_expected_attached_kind,PointsToFirstBadToken,
+      "expected an attached macro role such as 'peer'", ())
+ERROR(macro_role_attr_expected_freestanding_kind,PointsToFirstBadToken,
+      "expected a freestanding macro role such as 'expression'", ())
 ERROR(macro_role_syntax_mismatch,PointsToFirstBadToken,
       "%select{a freestanding|an attached}0 macro cannot have the %1 role",
       (bool, Identifier))
@@ -2056,14 +2055,14 @@ ERROR(macro_attribute_unknown_label,PointsToFirstBadToken,
       (bool, Identifier))
 ERROR(macro_attribute_duplicate_label,PointsToFirstBadToken,
       "@%select{freestanding|attached}0 already has an argument with "
-      "label %1", (bool, Identifier))
-ERROR(macro_attribute_missing_label,PointsToFirstBadToken,
+      "label %1", (bool, StringRef))
+ERROR(macro_attribute_missing_label,none,
       "@%select{freestanding|attached}0 argument is missing label '%1'",
       (bool, StringRef))
 ERROR(macro_attribute_unknown_name_kind,PointsToFirstBadToken,
       "unknown introduced name kind %0", (Identifier))
 ERROR(macro_attribute_unknown_argument_form,PointsToFirstBadToken,
-      "introduced name argument should be an identifier", ())
+      "introduced name argument should be a name", ())
 ERROR(macro_attribute_introduced_name_requires_argument,PointsToFirstBadToken,
       "introduced name kind %0 requires a single argument '(name)'", (Identifier))
 ERROR(macro_attribute_introduced_name_requires_no_argument,PointsToFirstBadToken,

include/swift/AST/MacroDeclaration.h

@@ -111,13 +111,13 @@ class MacroIntroducedDeclName {
 
 private:
   Kind kind;
-  Identifier identifier;
+  DeclName name;
 
 public:
-  MacroIntroducedDeclName(Kind kind, Identifier identifier = Identifier())
-      : kind(kind), identifier(identifier) {};
+  MacroIntroducedDeclName(Kind kind, DeclName name = DeclName())
+      : kind(kind), name(name) {};
 
-  static MacroIntroducedDeclName getNamed(Identifier name) {
+  static MacroIntroducedDeclName getNamed(DeclName name) {
     return MacroIntroducedDeclName(Kind::Named, name);
   }
 
@@ -138,7 +138,7 @@ class MacroIntroducedDeclName {
   }
 
   Kind getKind() const { return kind; }
-  Identifier getIdentifier() const { return identifier; }
+  DeclName getName() const { return name; }
 };
 
 }

lib/AST/Attr.cpp

@@ -1382,9 +1382,9 @@ bool DeclAttribute::printImpl(ASTPrinter &Printer, const PrintOptions &Options,
           [&](MacroIntroducedDeclName name) {
             Printer << getMacroIntroducedDeclNameString(name.getKind());
             if (macroIntroducedNameRequiresArgument(name.getKind())) {
-              StringRef nameText = name.getIdentifier().str();
-              bool shouldEscape = escapeKeywordInContext(
-                  nameText, PrintNameContext::Normal) || nameText == "$";
+              SmallString<32> buffer;
+              StringRef nameText = name.getName().getString(buffer);
+              bool shouldEscape = nameText == "$";
               Printer << "(";
               if (shouldEscape)
                 Printer << "`";

lib/AST/Decl.cpp

@@ -10256,7 +10256,7 @@ void MacroDecl::getIntroducedNames(MacroRole role, ValueDecl *attachedTo,
   for (auto expandedName : attr->getNames()) {
     switch (expandedName.getKind()) {
     case MacroIntroducedDeclNameKind::Named: {
-      names.push_back(DeclName(expandedName.getIdentifier()));
+      names.push_back(DeclName(expandedName.getName()));
       break;
     }
 
@@ -10276,7 +10276,7 @@ void MacroDecl::getIntroducedNames(MacroRole role, ValueDecl *attachedTo,
       std::string prefixedName;
       {
         llvm::raw_string_ostream out(prefixedName);
-        out << expandedName.getIdentifier();
+        out << expandedName.getName();
         out << baseName.getIdentifier();
       }
 
@@ -10294,7 +10294,7 @@ void MacroDecl::getIntroducedNames(MacroRole role, ValueDecl *attachedTo,
       {
         llvm::raw_string_ostream out(suffixedName);
         out << baseName.getIdentifier();
-        out << expandedName.getIdentifier();
+        out << expandedName.getName();
       }
 
       Identifier nameId = ctx.getIdentifier(suffixedName);