Implement the last part of C++ [class.mem]p2, delaying the parsing of
exception specifications on member functions until after the closing
'}' for the containing class. This allows, for example, a member
function to throw an instance of its own class. Fixes PR12564 and a
fairly embarassing oversight in our C++98/03 support.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseCXXInlineMethods.cpp b/lib/Parse/ParseCXXInlineMethods.cpp
index d2a8535..f04d767 100644
--- a/lib/Parse/ParseCXXInlineMethods.cpp
+++ b/lib/Parse/ParseCXXInlineMethods.cpp
@@ -59,7 +59,7 @@
}
}
- HandleMemberFunctionDefaultArgs(D, FnD);
+ HandleMemberFunctionDeclDelays(D, FnD);
D.complete(FnD);
@@ -348,6 +348,77 @@
LM.DefaultArgs[I].Toks = 0;
}
}
+
+ // Parse a delayed exception-specification, if there is one.
+ if (CachedTokens *Toks = LM.ExceptionSpecTokens) {
+ // Save the current token position.
+ SourceLocation origLoc = Tok.getLocation();
+
+ // Parse the default argument from its saved token stream.
+ Toks->push_back(Tok); // So that the current token doesn't get lost
+ PP.EnterTokenStream(&Toks->front(), Toks->size(), true, false);
+
+ // Consume the previously-pushed token.
+ ConsumeAnyToken();
+
+ // C++11 [expr.prim.general]p3:
+ // If a declaration declares a member function or member function
+ // template of a class X, the expression this is a prvalue of type
+ // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
+ // and the end of the function-definition, member-declarator, or
+ // declarator.
+ CXXMethodDecl *Method;
+ if (FunctionTemplateDecl *FunTmpl
+ = dyn_cast<FunctionTemplateDecl>(LM.Method))
+ Method = cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
+ else
+ Method = cast<CXXMethodDecl>(LM.Method);
+
+ Sema::CXXThisScopeRAII ThisScope(Actions, Method->getParent(),
+ Method->getTypeQualifiers(),
+ getLangOpts().CPlusPlus0x);
+
+ // Parse the exception-specification.
+ SourceRange SpecificationRange;
+ SmallVector<ParsedType, 4> DynamicExceptions;
+ SmallVector<SourceRange, 4> DynamicExceptionRanges;
+ ExprResult NoexceptExpr;
+ CachedTokens *ExceptionSpecTokens;
+
+ ExceptionSpecificationType EST
+ = tryParseExceptionSpecification(/*Delayed=*/false, SpecificationRange,
+ DynamicExceptions,
+ DynamicExceptionRanges, NoexceptExpr,
+ ExceptionSpecTokens);
+
+ // Clean up the remaining tokens.
+ if (Tok.is(tok::cxx_exceptspec_end))
+ ConsumeToken();
+ else if (EST != EST_None)
+ Diag(Tok.getLocation(), diag::err_except_spec_unparsed);
+
+ // Attach the exception-specification to the method.
+ if (EST != EST_None)
+ Actions.actOnDelayedExceptionSpecification(LM.Method, EST,
+ SpecificationRange,
+ DynamicExceptions,
+ DynamicExceptionRanges,
+ NoexceptExpr.isUsable()?
+ NoexceptExpr.get() : 0);
+
+ assert(!PP.getSourceManager().isBeforeInTranslationUnit(origLoc,
+ Tok.getLocation()) &&
+ "tryParseExceptionSpecification went over the exception tokens!");
+
+ // There could be leftover tokens (e.g. because of an error).
+ // Skip through until we reach the original token position.
+ while (Tok.getLocation() != origLoc && Tok.isNot(tok::eof))
+ ConsumeAnyToken();
+
+ delete LM.ExceptionSpecTokens;
+ LM.ExceptionSpecTokens = 0;
+ }
+
PrototypeScope.Exit();
// Finish the delayed C++ method declaration.