Parse the exception-specification throw(...), a Microsoft extension

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60359 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticKinds.def

@@ -587,6 +587,8 @@ DIAG(warn_parens_disambiguated_as_function_decl, WARNING,
      "parentheses were disambiguated as a function declarator")
 DIAG(err_expected_member_or_base_name, ERROR,
      "expected class member or base class name")
+DIAG(ext_ellipsis_exception_spec, EXTENSION,
+     "exception specification of '...' is a Microsoft extension")
 
 // Language specific pragmas
 

lib/Parse/ParseDeclCXX.cpp

@@ -763,12 +763,13 @@ Parser::MemInitResult Parser::ParseMemInitializer(DeclTy *ConstructorDecl) {
 /// ParseExceptionSpecification - Parse a C++ exception-specification
 /// (C++ [except.spec]).
 ///
-///    exception-specification:
-///      'throw' '(' type-id-list [opt] ')'
+///       exception-specification:
+///         'throw' '(' type-id-list [opt] ')'
+/// [MS]    'throw' '(' '...' ')'
 ///      
-///    type-id-list:
-///      type-id
-///      type-id-list ',' type-id
+///       type-id-list:
+///         type-id
+///         type-id-list ',' type-id
 ///
 bool Parser::ParseExceptionSpecification() {
   assert(Tok.is(tok::kw_throw) && "expected throw");
@@ -780,6 +781,16 @@ bool Parser::ParseExceptionSpecification() {
   }
   SourceLocation LParenLoc = ConsumeParen();
 
+  // Parse throw(...), a Microsoft extension that means "this function
+  // can throw anything".
+  if (Tok.is(tok::ellipsis)) {
+    SourceLocation EllipsisLoc = ConsumeToken();
+    if (!getLang().Microsoft)
+      Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
+    SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
+    return false;
+  }
+
   // Parse the sequence of type-ids.
   while (Tok.isNot(tok::r_paren)) {
     ParseTypeName();

test/SemaCXX/ms-exception-spec.cpp

@@ -0,0 +1,3 @@
+// RUN: clang %s -fsyntax-only -verify -fms-extensions
+
+void f() throw(...) { }