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2009-04-12fix another case that assumed that GetTypeForDeclarator would never return null.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68918 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-12fix code that incorrectly assumed that GetTypeForDeclarator cannotChris Lattner
return null. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68916 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-12Diagnose invalid uses of tagged types with a missing tag. For example, in:Chris Lattner
struct xyz { int y; }; enum abc { ZZZ }; static xyz b; abc c; we used to produce: t2.c:4:8: error: unknown type name 'xyz' static xyz b; ^ t2.c:5:1: error: unknown type name 'abc' abc c; ^ we now produce: t2.c:4:8: error: use of tagged type 'xyz' without 'struct' tag static xyz b; ^ struct t2.c:5:1: error: use of tagged type 'abc' without 'enum' tag abc c; ^ enum GCC produces the normal: t2.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘b’ t2.c:5: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘c’ rdar://6783347 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68914 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-12fix a valgrind problem I noticed while developing another patch,Chris Lattner
if a decl is invalid, it isn't added to the Decls array, so we need to pass in Decls.size() to avoid reading uninit memory. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68913 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-12a few cleanups to StatementCreatesScope: unnest the whole thing,Chris Lattner
exit at the first decl found that creates a scope, don't evaluate decl_end() every iteration. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68908 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-11simplify code to use adjustParameterType, apply objc arg attributesChris Lattner
to their arguments. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68876 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-11diagnose attempts to return objc interfaces by-value from C functions.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68873 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-11Improve the 'cannot pass objc interface by value' diagnostic:Chris Lattner
1) improve localizability by not passing english strings in. 2) improve location for arguments. 3) print the objc type being passed. Before: method-bad-param.m:15:1: error: Objective-C type cannot be passed by value -(void) my_method:(foo) my_param ^ after: method-bad-param.m:15:25: error: Objective-C interface type 'foo' cannot be passed by value -(void) my_method:(foo) my_param ^ git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68872 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-10Compare the predefines buffer in the PCH file with the predefinesDouglas Gregor
buffer generated for the current translation unit. If they are different, complain and then ignore the PCH file. This effectively checks for all compilation options that somehow would affect preprocessor state (-D, -U, -include, the dreaded -imacros, etc.). When we do accept the PCH file, throw away the contents of the predefines buffer rather than parsing them, since all of the results of that parsing are already stored in the PCH file. This eliminates the ugliness with the redefinition of __builtin_va_list, among other things. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68838 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-10Various minor fixes to PCH reading and writing, with generalDouglas Gregor
cleanup. Aside from a minor tweak to the PCH file format, no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68793 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-09Implementation of pre-compiled headers (PCH) based on lazyDouglas Gregor
de-serialization of abstract syntax trees. PCH support serializes the contents of the abstract syntax tree (AST) to a bitstream. When the PCH file is read, declarations are serialized as-needed. For example, a declaration of a variable "x" will be deserialized only when its VarDecl can be found by a client, e.g., based on name lookup for "x" or traversing the entire contents of the owner of "x". This commit provides the framework for serialization and (lazy) deserialization, along with support for variable and typedef declarations (along with several kinds of types). More declarations/types, along with important auxiliary structures (source manager, preprocessor, etc.), will follow. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68732 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-09Propagate the ASTContext to various AST traversal and lookup functions.Douglas Gregor
No functionality change (really). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68726 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-09Add some FIXMEs for missing checks.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68725 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-08-Wmissing-prototypes shouldn't complain about main() missing a prototype.Douglas Gregor
Fixes <rdar://problem/6759522> git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68611 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-07Diagnose uses of function specifiers on declarations which don't declareEli Friedman
functions. Fixes PR3941. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68541 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-02Clean up -fixit output slightlyDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68278 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-01Add some more code modification hintsDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68261 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-01Make parsing a semantic analysis a little more robust following SemaDouglas Gregor
failures that involve malformed types, e.g., "typename X::foo" where "foo" isn't a type, or "std::vector<void>" that doens't instantiate properly. Similarly, be a bit smarter in our handling of ambiguities that occur in Sema::getTypeName, to eliminate duplicate error messages about ambiguous name lookup. This eliminates two XFAILs in test/SemaCXX, one of which was crying out to us, trying to tell us that we were producing repeated error messages. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68251 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-31Implement -Wmissing-prototypes. Fixes PR3911.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68110 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-29Push DeclGroup much farther throughout the compiler. Now the variousChris Lattner
productions (except the already broken ObjC cases like @class X,Y;) in the parser that can produce more than one Decl return a DeclGroup instead of a Decl, etc. This allows elimination of the Decl::NextDeclarator field, and exposes various clients that should look at all decls in a group, but which were only looking at one (such as the dumper, printer, etc). These have been fixed. Still TODO: 1) there are some FIXME's in the code about potentially using DeclGroup for better location info. 2) ParseObjCAtDirectives should return a DeclGroup due to @class etc. 3) I'm not sure what is going on with StmtIterator.cpp, or if it can be radically simplified now. 4) I put a truly horrible hack in ParseTemplate.cpp. I plan to bring up #3/4 on the mailing list, but don't plan to tackle #1/2 in the short term. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68002 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-28Introduce a new OpaquePtr<N> struct type, which is a simple POD wrapper for aChris Lattner
pointer. Its purpose in life is to be a glorified void*, but which does not implicitly convert to void* or other OpaquePtr's with a different UID. Introduce Action::DeclPtrTy which is a typedef for OpaquePtr<0>. Change the entire parser/sema interface to use DeclPtrTy instead of DeclTy*. This makes the C++ compiler enforce that these aren't convertible to other opaque types. We should also convert ExprTy, StmtTy, TypeTy, AttrTy, BaseTy, etc, but I don't plan to do that in the short term. The one outstanding known problem with this patch is that we lose the bitmangling optimization where ActionResult<DeclPtrTy> doesn't know how to bitmangle the success bit into the low bit of DeclPtrTy. I will rectify this with a subsequent patch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67952 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-27Improve recovery when a constructor fails to type-check. Test case from AndersDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67818 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-26Factor the member access specifier setting code into its own function. No ↵Anders Carlsson
intended functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67725 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-26Check that the access specifier of a member redeclaration is the same as the ↵Anders Carlsson
original declaration. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67722 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-26The injected-class-name of class templates and class templateDouglas Gregor
specializations can be treated as a template. Finally, we can parse and process the first implementation of Fibonacci I wrote! Note that this code does not handle all of the cases where injected-class-names can be treated as templates. In particular, there's an ambiguity case that we should be able to handle (but can't), e.g., template <class T> struct Base { }; template <class T> struct Derived : Base<int>, Base<char> { typename Derived::Base b; // error: ambiguous typename Derived::Base<double> d; // OK }; git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67720 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-25Tighten the setAccess assert. We now allow AS_none if the decl contex is not ↵Anders Carlsson
a C++ record decl. Also, fix fallout from the change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67717 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-25Implement template instantiation for static data members of classDouglas Gregor
templates, including in-class initializers. For example: template<typename T, T Divisor> class X { public: static const T value = 10 / Divisor; }; instantiated with, e.g., X<int, 5>::value to get the value '2'. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67715 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-25Pass access specifiers through to member classes and member enums.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67710 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-25Instantiation for member classes of class templates. Note that onlyDouglas Gregor
the declarations of member classes are instantiated when the owning class template is instantiated. The definitions of such member classes are instantiated when a complete type is required. This change also introduces the injected-class-name into a class template specialization. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67707 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-25Predicate to detect when a RecordDecl is really the injected-class-nameDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67687 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Make sure to use RequireCompleteType rather than testing forDouglas Gregor
incomplete types. RequireCompleteType is needed when the type may be completed by instantiating a template. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67643 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24More work on diagnosing abstract classes. We can now handle cases likeAnders Carlsson
class C { void g(C c); virtual void f() = 0; }; In this case, C is not known to be abstract when doing semantic analysis on g. This is done by recursively traversing the abstract class and checking the types of member functions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67594 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Template instantiation for the declarations of member functions withinDouglas Gregor
a class template. At present, we can only instantiation normal methods, but not constructors, destructors, or conversion operators. As ever, this contains a bit of refactoring in Sema's type-checking. In particular: - Split ActOnFunctionDeclarator into ActOnFunctionDeclarator (handling the declarator itself) and CheckFunctionDeclaration (checking for the the function declaration), the latter of which is also used by template instantiation. - We were performing the adjustment of function parameter types in three places; collect those into a single new routine. - When the type of a parameter is adjusted, allocate an OriginalParmVarDecl to keep track of the type as it was written. - Eliminate a redundant check for out-of-line declarations of member functions; hide more C++-specific checks on function declarations behind if(getLangOptions().CPlusPlus). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67575 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23More improvements to abstract type checking. Handle arrays correctly, and ↵Anders Carlsson
make sure to check parameter types before they decay. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67550 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23It's an error to try to allocate an abstract object using new.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67542 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Fix PR3855. When we encounter an incompatible redeclaration of aDouglas Gregor
library function, accept this declaration and pretend that we do not know that this is a library function. autoconf depends on this (broken) behavior. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67541 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Tighten up the determination of whether a function declaration has aDouglas Gregor
prototype. Thanks Eli! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67533 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-23Thanks to Eli for pointing out my misreading of 6.2.2p5Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67530 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22Disallow abstract types where appropriate.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67476 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-22Keep track of whether a class is abstract or not. This is currently only ↵Anders Carlsson
used for the __is_abstract type trait. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67461 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19Variables marked as "extern" can actually have internal linkage ifDouglas Gregor
there is a previous declaration marked "static". This fixes PR3645. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67336 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19Add a clarifying comment about HasPrototype's computationDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67316 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19If a function is declared as, e.g.,Douglas Gregor
F f; where F is a typedef of a function type, then the function "f" has a prototype. This is a slight tweak to Chris's suggested fix in PR3817. Fixes PR3817 and PR3840. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67313 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19Introduce a new expression type, UnresolvedDeclRefExpr, that describesDouglas Gregor
dependent qualified-ids such as Fibonacci<N - 1>::value where N is a template parameter. These references are "unresolved" because the name is dependent and, therefore, cannot be resolved to a declaration node (as we would do for a DeclRefExpr or QualifiedDeclRefExpr). UnresolvedDeclRefExprs instantiate to DeclRefExprs, QualifiedDeclRefExprs, etc. Also, be a bit more careful about keeping only a single set of specializations for a class template, and instantiating from the definition of that template rather than a previous declaration. In general, we need a better solution for this for all TagDecls, because it's too easy to accidentally look at a declaration that isn't the definition. We can now process a simple Fibonacci computation described as a template metaprogram. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67308 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19Extend the use of QualifiedNameType to the creation of class templateDouglas Gregor
specialization names. This way, we keep track of sugared types like std::vector<Real> I believe we are now using QualifiedNameTypes everywhere we can. Next step: QualifiedDeclRefExprs. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67268 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-19Introduce a representation for types that we referred to via aDouglas Gregor
qualified name, e.g., foo::x so that we retain the nested-name-specifier as written in the source code and can reproduce that qualified name when printing the types back (e.g., in diagnostics). This is PR3493, which won't be complete until finished the other tasks mentioned near the end of this commit. The parser's representation of nested-name-specifiers, CXXScopeSpec, is now a bit fatter, because it needs to contain the scopes that precede each '::' and keep track of whether the global scoping operator '::' was at the beginning. For example, we need to keep track of the leading '::', 'foo', and 'bar' in ::foo::bar::x The Action's CXXScopeTy * is no longer a DeclContext *. It's now the opaque version of the new NestedNameSpecifier, which contains a single component of a nested-name-specifier (either a DeclContext * or a Type *, bitmangled). The new sugar type QualifiedNameType composes a sequence of NestedNameSpecifiers with a representation of the type we're actually referring to. At present, we only build QualifiedNameType nodes within Sema::getTypeName. This will be extended to other type-constructing actions (e.g., ActOnClassTemplateId). Also on the way: QualifiedDeclRefExprs will also store a sequence of NestedNameSpecifiers, so that we can print out the property nested-name-specifier. I expect to also use this for handling dependent names like Fibonacci<I - 1>::value. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67265 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-18The scope representation can now be either a DeclContext pointer or aDouglas Gregor
Type pointer. This allows our nested-name-specifiers to retain more information about the actual spelling (e.g., which typedef did the user name, or what exact template arguments were used in the template-id?). It will also allow us to have dependent nested-name-specifiers that don't map to any DeclContext. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67140 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-17pull a nested conditional + comment out into its own variable,Chris Lattner
no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67128 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-17Implement instantiation of enums within class templates. This isn'tDouglas Gregor
quite as great as it sounds, because, while we can refer to the enumerator values outside the template, e.g., adder<long, 3, 4>::value we can't yet refer to them with dependent names, so no Fibonacci (yet). InstantiateClassTemplateSpecialization is getting messy; next commit will put it into a less-ugly state. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67092 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-16Check signedness of bitfield sizes.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67045 91177308-0d34-0410-b5e6-96231b3b80d8
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