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* Implement the Objective-C __kindof type qualifier.Douglas Gregor2015-07-071-0/+19
| | | | | | | | | | The __kindof type qualifier can be applied to Objective-C object (pointer) types to indicate id-like behavior, which includes implicit "downcasting" of __kindof types to subclasses and id-like message-send behavior. __kindof types provide better type bounds for substitutions into unspecified generic types, which preserves more type information. llvm-svn: 241548
* C++ support for Objective-C lightweight generics.Douglas Gregor2015-07-071-16/+24
| | | | | | | | | | | | | | | | | | | Teach C++'s tentative parsing to handle specializations of Objective-C class types (e.g., NSArray<NSString *>) as well as Objective-C protocol qualifiers (id<NSCopying>) by extending type-annotation tokens to handle this case. As part of this, remove Objective-C protocol qualifiers from the declaration specifiers, which never really made sense: instead, provide Sema entry points to make them part of the type annotation token. Among other things, this properly diagnoses bogus types such as "<NSCopying> id" which should have been written as "id <NSCopying>". Implements template instantiation support for, e.g., NSArray<T>* in C++. Note that parameterized classes are not templates in the C++ sense, so that cannot (for example) be used as a template argument for a template template parameter. Part of rdar://problem/6294649. llvm-svn: 241545
* Substitute type arguments into uses of Objective-C interface members.Douglas Gregor2015-07-071-30/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When messaging a method that was defined in an Objective-C class (or category or extension thereof) that has type parameters, substitute the type arguments for those type parameters. Similarly, substitute into property accesses, instance variables, and other references. This includes general infrastructure for substituting the type arguments associated with an ObjCObject(Pointer)Type into a type referenced within a particular context, handling all of the substitutions required to deal with (e.g.) inheritance involving parameterized classes. In cases where no type arguments are available (e.g., because we're messaging via some unspecialized type, id, etc.), we substitute in the type bounds for the type parameters instead. Example: @interface NSSet<T : id<NSCopying>> : NSObject <NSCopying> - (T)firstObject; @end void f(NSSet<NSString *> *stringSet, NSSet *anySet) { [stringSet firstObject]; // produces NSString* [anySet firstObject]; // produces id<NSCopying> (the bound) } When substituting for the type parameters given an unspecialized context (i.e., no specific type arguments were given), substituting the type bounds unconditionally produces type signatures that are too strong compared to the pre-generics signatures. Instead, use the following rule: - In covariant positions, such as method return types, replace type parameters with “id” or “Class” (the latter only when the type parameter bound is “Class” or qualified class, e.g, “Class<NSCopying>”) - In other positions (e.g., parameter types), replace type parameters with their type bounds. - When a specialized Objective-C object or object pointer type contains a type parameter in its type arguments (e.g., NSArray<T>*, but not NSArray<NSString *> *), replace the entire object/object pointer type with its unspecialized version (e.g., NSArray *). llvm-svn: 241543
* Handle Objective-C type arguments.Douglas Gregor2015-07-071-10/+40
| | | | | | | | | | | | | | | | | | | | | Objective-C type arguments can be provided in angle brackets following an Objective-C interface type. Syntactically, this is the same position as one would provide protocol qualifiers (e.g., id<NSCopying>), so parse both together and let Sema sort out the ambiguous cases. This applies both when parsing types and when parsing the superclass of an Objective-C class, which can now be a specialized type (e.g., NSMutableArray<T> inherits from NSArray<T>). Check Objective-C type arguments against the type parameters of the corresponding class. Verify the length of the type argument list and that each type argument satisfies the corresponding bound. Specializations of parameterized Objective-C classes are represented in the type system as distinct types. Both specialized types (e.g., NSArray<NSString *> *) and unspecialized types (NSArray *) are represented, separately. llvm-svn: 241542
* [CONCEPTS] Parsing of concept keywordHubert Tong2015-06-301-0/+8
| | | | | | | | | | | | | | | | | | Summary: This change adds parsing for the concept keyword in a declaration and tracks the location. Diagnostic testing added for invalid use of concept keyword. Reviewers: faisalv, fraggamuffin, rsmith, hubert.reinterpretcast Reviewed By: rsmith, hubert.reinterpretcast Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D10528 Patch by Nathan Wilson! llvm-svn: 241060
* [Parse] Allow 'constexpr' in condition declarationsMeador Inge2015-06-251-1/+1
| | | | | | | | | | | | | | | | | This patch implements the functionality specified by DR948. The changes are two fold. First, the parser was modified to allow 'constexpr's to appear in condition declarations (which was a hard error before). Second, Sema was modified to cleanup maybe odr-used declarations by way of a call to 'ActOnFinishFullExpr'. As 'constexpr's were not allowed in condition declarations before the cleanup wasn't necessary (such declarations were always odr-used). This fixes PR22491. Differential Revision: http://reviews.llvm.org/D8978 llvm-svn: 240707
* Replace __double_underscored type nullability qualifiers with ↵Douglas Gregor2015-06-241-15/+15
| | | | | | | | | | | | | | | | _Uppercase_underscored Addresses a conflict with glibc's __nonnull macro by renaming the type nullability qualifiers as follows: __nonnull -> _Nonnull __nullable -> _Nullable __null_unspecified -> _Null_unspecified This is the major part of rdar://problem/21530726, but does not yet provide the Darwin-specific behavior for the old names. llvm-svn: 240596
* Handle 'instancetype' in ParseDeclarationSpecifiers.Douglas Gregor2015-06-191-0/+13
| | | | | | | | | | ...instead of as a special case in ParseObjCTypeName with lots of duplicated logic. Besides being a nice refactoring, this also allows "- (instancetype __nonnull)self" in addition to "- (nonnull instancetype)self". rdar://problem/19924646 llvm-svn: 240188
* Introduce type nullability specifiers for C/C++.Douglas Gregor2015-06-191-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | | Introduces the type specifiers __nonnull, __nullable, and __null_unspecified that describe the nullability of the pointer type to which the specifier appertains. Nullability type specifiers improve on the existing nonnull attributes in a few ways: - They apply to types, so one can represent a pointer to a non-null pointer, use them in function pointer types, etc. - As type specifiers, they are syntactically more lightweight than __attribute__s or [[attribute]]s. - They can express both the notion of 'should never be null' and also 'it makes sense for this to be null', and therefore can more easily catch errors of omission where one forgot to annotate the nullability of a particular pointer (this will come in a subsequent patch). Nullability type specifiers are maintained as type sugar, and therefore have no effect on mangling, encoding, overloading, etc. Nonetheless, they will be used for warnings about, e.g., passing 'null' to a method that does not accept it. This is the C/C++ part of rdar://problem/18868820. llvm-svn: 240146
* [clang] Refactoring of conditions so they use isOneOf() instead of multiple ↵Daniel Marjamaki2015-06-181-19/+18
| | | | | | is(). llvm-svn: 240008
* __declspec is not a core Clang language extension. Instead, require ↵Aaron Ballman2015-05-261-0/+3
| | | | | | | -fms-extensions or -fborland to enable the language extension. Note: __declspec is also temporarily enabled when compiling for a CUDA target because there are implementation details relying on __declspec(property) support currently. When those details change, __declspec should be disabled for CUDA targets. llvm-svn: 238238
* Refactored some common functionality into MaybeParseMicrosoftDeclSpecs; NFC.Aaron Ballman2015-05-201-54/+55
| | | | llvm-svn: 237835
* [modules] Suport for merging a parsed enum definition into an existing ↵Richard Smith2015-05-071-1/+23
| | | | | | imported but not visible definition. llvm-svn: 236690
* Batch up access-related diagnostics on enum constants until the whole enum ↵Jordan Rose2015-04-301-2/+11
| | | | | | | | | | is parsed. That way we can take any trailing availability attributes into account. rdar://problem/20713550 llvm-svn: 236241
* [MS ABI] Correctly associate align attrs before the class-keyDavid Majnemer2015-04-191-0/+42
| | | | | | | | | | | | __declspec(align(...)) is unlike all other attributes in that it is not applied to a variable if it appears before the class-key. If the tag in question isn't part of a variable declaration, it is not ignored. Instead, the alignment attribute is applied to the tag. This fixes PR18024. llvm-svn: 235272
* [parser] Push _Atomic locs through DeclaratorChunk.Benjamin Kramer2015-03-291-1/+2
| | | | | | | Otherwise it stays uninitialized with potentially catastrophic results. Found by afl-fuzz. llvm-svn: 233494
* Diagnose ref-qualifiers occuring after virt-specifier-seq and generate fixit ↵Ehsan Akhgari2015-03-251-8/+17
| | | | | | | | | | | | | | hints Summary: Follow-up to the fix of PR22075. Reviewers: rsmith Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7012 llvm-svn: 233161
* Diagnose declspecs occuring after virt-specifier-seq and generate fixit hintsEhsan Akhgari2015-03-251-1/+1
| | | | | | | | | | | | Summary: This fixes PR22075. Reviewers: rsmith Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D6828 llvm-svn: 233160
* Revert "Diagnose declspecs occuring after virt-specifier-seq and generate ↵Ehsan Akhgari2015-03-241-1/+1
| | | | | | | | fixit hints" This reverts commit 2131e63e2fdff7c831ab3bfe31facf2e3ebab03d. llvm-svn: 233074
* Revert "Diagnose ref-qualifiers occuring after virt-specifier-seq and ↵Ehsan Akhgari2015-03-241-17/+8
| | | | | | | | generate fixit hints" This reverts commit 49079d45966a3f57cd82edb35bde2e8e88fccf40. llvm-svn: 233073
* Diagnose ref-qualifiers occuring after virt-specifier-seq and generate fixit ↵Ehsan Akhgari2015-03-241-8/+17
| | | | | | | | | | | | | | hints Summary: Follow-up to the fix of PR22075. Reviewers: rsmith Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7012 llvm-svn: 233070
* Diagnose declspecs occuring after virt-specifier-seq and generate fixit hintsEhsan Akhgari2015-03-241-1/+1
| | | | | | | | | | | | Summary: This fixes PR22075. Reviewers: rsmith Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D6828 llvm-svn: 233069
* Use Sema's PrintingPolicy when diagnosing DeclSpecs.Benjamin Kramer2015-03-121-1/+2
| | | | | | | | | | | | | Sema overrides ASTContext's policy on the first emitted diagnostic (doesn't matter if it's ignored or not). This means changing the order of diagnostic emission in Sema suddenly changes the text of diagnostic emitted from the parser. In the test case -Wmissing-prototypes (ignored) was the culprit, use 'int main' to suppress that warning so we see when this regresses. Also move it into Sema/ as it's not testing any C++. llvm-svn: 232039
* Simplify boolean expressions in clang with clang-tidyDavid Blaikie2015-03-091-1/+1
| | | | | | | | Patch by Richard (legalize at xmission dot com). Differential Revision: http://reviews.llvm.org/D8155 llvm-svn: 231619
* Wrap to 80 columns. No behavior change.Nico Weber2015-02-181-9/+11
| | | | llvm-svn: 229637
* Don't crash on `struct ::, struct ::` (and the same for enums).Nico Weber2015-02-151-2/+5
| | | | | | | | | | | | | | | | | | | The first part of that line doesn't parse correctly and ParseClassSpecifier() for some reason skips to tok::comma to recover, and then ParseDeclarationSpecifiers() sees the next struct and calls ParseClassSpecifier() again with the same DeclSpec object. However, the first call already called ActOnCXXGlobalScopeSpecifier() on the DeclSpec's CXXScopeSpec, and sema gets confused when this gets called again. As a fix, let ParseClassSpecifier() (and ParseEnumSpecifier()) call ParseOptionalCXXScopeSpec() with a temporary CXXScopeSpec object, and only copy it into the DeclSpec if things work out. (This is also how all the other functions that set the DeclSpec's TypeSpecScope set it.) Found by SLi's bot. llvm-svn: 229288
* Initial support for C++ parameter completionFrancisco Lopes da Silva2015-01-211-1/+5
| | | | | | | | | | | | | | | | | | | | The improved completion in call context now works with: - Functions. - Member functions. - Constructors. - New expressions. - Function call expressions. - Template variants of the previous. There are still rough edges to be fixed: - Provide support for optional parameters. (fix known) - Provide support for member initializers. (fix known) - Provide support for variadic template functions. (fix unknown) - Others? llvm-svn: 226670
* Fix crash-on-invalid and name lookup when recovering from ~X::X() typo.Richard Smith2015-01-151-1/+10
| | | | llvm-svn: 226067
* Parse: Switch to using EOF tokens for late parsed attributesDavid Majnemer2015-01-131-12/+15
| | | | | | | | | The EOF token injection technique is preferable to using isBeforeInTranslationUnit to determine whether or not additional cleanup is needed. I don't have an example off-hand that requires it but it is nicer nonetheless. llvm-svn: 225776
* Parse: Don't crash if missing an initializer expressionDavid Majnemer2015-01-131-1/+2
| | | | llvm-svn: 225768
* Parse: Further simplify ParseLexedMethodDeclarationDavid Majnemer2015-01-131-8/+0
| | | | | | | No functionality change intended, just moving code around to make it simpler. llvm-svn: 225763
* [PowerPC]To provide better compatibility with gcc I added the __bool keyword ↵Bill Seurer2015-01-121-0/+5
| | | | | | | | | | | | | | | | | to the Alitivec support in clang. __bool is functionally identical to using bool when declaring vector types. For example: vector bool char v_bc; vector __bool char v___bc; clang already supported vector/__vector and pixel/__pixel but was missing __bool. http://llvm.org/bugs/show_bug.cgi?id=19220 For reference: https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html http://reviews.llvm.org/D6882 llvm-svn: 225664
* Parse: Get rid of tok::cxx_defaultarg_end, use EOF insteadDavid Majnemer2015-01-121-1/+2
| | | | | | | I added setEofData/getEofData to solve this sort of problem back in r224505. Use the Param's decl to tell us if this is *our* EOF token. llvm-svn: 225619
* Parse: __attribute__((keyword)) shouldn't errorDavid Majnemer2015-01-031-3/+4
| | | | | | | Weird constructs like __attribute__((inline)) or __attibute__((typename)) should result in warnings, not errors. llvm-svn: 225118
* Parse: Don't crash when 'typename' shows up in an attributeDavid Majnemer2014-12-281-1/+2
| | | | | | | | | isDeclarationSpecifier performs error recovers which jostles the token stream. Specifically, TryAnnotateTypeOrScopeToken will end up consuming a typename token which will confuse the attribute parsing machinery as we no-longer have something identifier-like. llvm-svn: 224903
* PR21969: Improve diagnostics for a conversion function that has any pieces of aRichard Smith2014-12-191-1/+1
| | | | | | declared return type (including a trailing-return-type in C++14). llvm-svn: 224561
* Correct delayed typos in the operand to typeof expressions.Kaelyn Takata2014-12-191-2/+2
| | | | | | Fixes PR21947. llvm-svn: 224558
* Diagnose function template definitions inside functionsReid Kleckner2014-12-151-3/+5
| | | | | | | | | | | | | | | The parser can only be tricked into parsing a function template definition by inserting a typename keyword before the function template declaration. This used to make us crash, and now it's fixed. While here, remove an unneeded boolean parameter from ParseDeclGroup. This boolean always corresponded to non-typedef declarators at file scope. ParseDeclGroup already has precise diagnostics for the function definition typedef case, so we can let that through. Fixes PR21839. llvm-svn: 224287
* Parse qualifiers after comma in declarator lists as a Microsoft extensionNico Rieck2014-12-041-0/+40
| | | | | | MSVC parses and ignores these with a warning. llvm-svn: 223413
* Fix PR21684 - Ellipsis following an 'auto' parameter sans name/ID Faisal Vali2014-12-041-7/+8
| | | | | | | | should indicate a c++ parameter pack not a c-variadic. int i = [](auto...) { return 0; }(); // OK now. llvm-svn: 223357
* [OpenCL] Generic address space has been added in OpenCL v2.0.Anastasia Stulova2014-11-261-0/+25
| | | | | | | | | | To support it in the frontend, the following has been added: - generic address space type attribute; - documentation for the OpenCL address space attributes; - parsing of __generic(generic) keyword; - test code for the parser and diagnostics. llvm-svn: 222831
* Enable ActOnIdExpression to use delayed typo correction for non-C++ codeKaelyn Takata2014-11-211-1/+2
| | | | | | when calling DiagnoseEmptyLookup. llvm-svn: 222551
* PR21565: Further refine the conditions for enabling eager parsing ofRichard Smith2014-11-201-2/+18
| | | | | | | | std::X::swap exception specifications (allowing parsing of non-conforming code in libstdc++). The old conditions also matched the functions in MSVC's STL, which were relying on deferred parsing here. llvm-svn: 222471
* Wire up delayed typo correction to DiagnoseEmptyLookup and set upKaelyn Takata2014-11-201-1/+3
| | | | | | | | | Sema::ActOnIdExpression to use the new functionality. Among other things, this allows recovery in several cases where it wasn't possible before (e.g. correcting a mistyped static_cast<>). llvm-svn: 222464
* Update for LLVM API change to make Small(Ptr)Set::insert return ↵David Blaikie2014-11-191-1/+1
| | | | | | pair<iterator, bool> as per the C++ standard's associative container concept. llvm-svn: 222335
* PR21565 Add an egregious hack to support broken libstdc++ headers that declareRichard Smith2014-11-141-1/+2
| | | | | | | | | | | | a member named 'swap' and then expect unqualified lookup for the name 'swap' in its exception specification to find anything else. Without delay-parsed exception specifications, this was ill-formed (NDR) by [basic.scope.class]p1, rule 2. With delay-parsed exception specifications, the call to 'swap' unambiguously finds the function being declared, which then fails because the arguments don't work for that function. llvm-svn: 221955
* PR21437, final part of DR1330: delay-parsing of exception-specifications. ThisRichard Smith2014-11-131-2/+8
| | | | | | | is a re-commit of Doug's r154844 (modernized and updated to fit into current Clang). llvm-svn: 221918
* Improve diagnostics if _Noreturn is placed after a function declarator. ↵Richard Smith2014-11-101-1/+22
| | | | | | (This sometimes happens when a macro is used that expands to either the GNU noreturn attribute or _Noreturn.) llvm-svn: 221630
* Updated the wording for a diagnostic to be more grammatically correct, and ↵Aaron Ballman2014-11-081-1/+1
| | | | | | use a %select. Also ensure that nested namespace definitions are diagnosed properly. Both changes are motivated by post-commit feedback from r221580. llvm-svn: 221581
* [c++1z] Support for attributes on namespaces and enumerators.Aaron Ballman2014-11-081-4/+9
| | | | llvm-svn: 221580
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