keep track of friends within templates, which will provide a real for
PR5866. For now, this makes sure we don't do something entirely stupid
with friends of specializations.
llvm-svn: 92143
size_t. Also, fix an issue with initialization of parameters in calls,
where we weren't removing the cv-qualifiers on the parameter type
itself. Fixes PR5823.
llvm-svn: 91941
this was useful, and on review Doug and I decided it was probably on the level
of a bug in the standard and therefore not worth a warning even in -pedantic.
If someone disagrees and urgently wants clang++ to warn about this in strict
c++98 mode, we can talk about it.
llvm-svn: 91868
the redeclaration problems in the [temp.explicit]p3 testcase worse, but I can
live with that; they'll need to be fixed more holistically anyhow.
llvm-svn: 91771
Magically fixes all the terrible lookup problems associated with not pushing
a new scope. Resolves an ancient xfail and an LLVM misparse.
llvm-svn: 91769
new InitializationSequence. This fixes some bugs (e.g., PR5808),
changed some diagnostics, and caused more churn than expected. What's
new:
- InitializationSequence now has a "C conversion sequence" category
and step kind, which falls back to
- Changed the diagnostics for returns to always have the result type
of the function first and the type of the expression second.
CheckSingleAssignmentConstraints to peform checking in C.
- Improved ASTs for initialization of return values. The ASTs now
capture all of the temporaries we need to create, but
intentionally do not bind the tempoary that is actually returned,
so that it won't get destroyed twice.
- Make sure to perform an (elidable!) copy of the class object that
is returned from a class.
- Fix copy elision in CodeGen to properly see through the
subexpressions that occur with elidable copies.
- Give "new" its own entity kind; as with return values and thrown
objects, we don't bind the expression so we don't call a
destructor for it.
Note that, with this patch, I've broken returning move-only types in
C++0x. We'll fix it later, when we tackle NRVO.
llvm-svn: 91669
than using its own partial implementation of initialization.
Switched CheckInitializerTypes over to
InitializedEntity/InitializationKind, to help move us closer to
InitializationSequence.
Added InitializedEntity::getName() to retrieve the name of the entity,
for diagnostics that care about such things.
Implemented support for default initialization in
InitializationSequence.
Clean up the determination of the "source expressions" for an
initialization sequence in InitializationSequence::Perform.
Taught CXXConstructExpr to store more location information.
llvm-svn: 91492
is difficult because they're so terribly, terribly ambiguous.
We implement access declarations in terms of using declarations, which is
quite reasonable. However, we should really persist the access/using
distinction in the AST and use the appropriate name in diagnostics. This
isn't a priority, so I'll just file a PR and hope someone else does it. :)
llvm-svn: 91095
declaration. Rename note_using_decl to note_using, which is possibly less confusing.
Add a test for non-class-scope using decl collisions and be sure to note the case
we can't diagnose yet.
llvm-svn: 91057
are a couple of O(n^2) operations in this, some analogous to the usual O(n^2)
redeclaration problem and some not. In particular, retroactively removing
shadow declarations when they're hidden by later decls is pretty unfortunate.
I'm not yet convinced it's worse than the alternative, though.
llvm-svn: 91045
new notion of an "initialization sequence", which encapsulates the
computation of the initialization sequence along with diagnostic
information and the capability to turn the computed sequence into an
expression. At present, I've only switched one CheckReferenceInit
callers over to this new mechanism; more will follow.
Aside from (hopefully) being much more true to the standard, the
diagnostics provided by this reference-initialization code are a bit
better than before. Some examples:
p5-var.cpp:54:12: error: non-const lvalue reference to type 'struct
Derived'
cannot bind to a value of unrelated type 'struct Base'
Derived &dr2 = b; // expected-error{{non-const lvalue reference to
...
^ ~
p5-var.cpp:55:9: error: binding of reference to type 'struct Base' to
a value of
type 'struct Base const' drops qualifiers
Base &br3 = bc; // expected-error{{drops qualifiers}}
^ ~~
p5-var.cpp:57:15: error: ambiguous conversion from derived class
'struct Diamond' to base class 'struct Base':
struct Diamond -> struct Derived -> struct Base
struct Diamond -> struct Derived2 -> struct Base
Base &br5 = diamond; // expected-error{{ambiguous conversion from
...
^~~~~~~
p5-var.cpp:59:9: error: non-const lvalue reference to type 'long'
cannot bind to
a value of unrelated type 'int'
long &lr = i; // expected-error{{non-const lvalue reference to type
...
^ ~
p5-var.cpp:74:9: error: non-const lvalue reference to type 'struct
Base' cannot
bind to a temporary of type 'struct Base'
Base &br1 = Base(); // expected-error{{non-const lvalue reference to
...
^ ~~~~~~
p5-var.cpp:102:9: error: non-const reference cannot bind to bit-field
'i'
int & ir1 = (ib.i); // expected-error{{non-const reference cannot
...
^ ~~~~~~
p5-var.cpp:98:7: note: bit-field is declared here
int i : 17; // expected-note{{bit-field is declared here}}
^
llvm-svn: 90992
instantiation, to ensure that we mark class template specilizations as
abstract when we need to and perform checking of abstract classes.
Also, move the checking that determines whether we are creating a
variable of abstract class type *after* we check whether the type is
complete. Otherwise, we won't see when we have an abstract class
template specialization that is implicitly instantiated by this
declaration. This is the "something else" that Sebastian had noted
earlier.
llvm-svn: 90467
overloaded-operator resolution is wildly untested, but the parallel code for
methods seems to satisfy some trivial tests.
Also change some overload-resolution APIs to take a type instead of an expression,
which lets us avoid creating a spurious CXXThisExpr when resolving implicit
member accesses.
llvm-svn: 90410
common to both parsing and template instantiation, so that we'll find
overridden virtuals for member functions of class templates when they
are instantiated.
Additionally, factor out the checking for pure virtual functions, so
that it will be executed both at parsing time and at template
instantiation time.
These changes fix PR5656 (for real), although one more tweak
w.r.t. member function templates will be coming along shortly.
llvm-svn: 90241
ValueDecl, because that isn't always the case in ill-formed
code. Diagnose a common mistake (forgetting to provide a template
argument list for a class template, PR5655) and dyn_cast so that we
handle the general problem of referring to a non-value declaration
gracefully.
llvm-svn: 90239
function templates (in C++98), friend function templates, and
out-of-line definitions of members of class templates.
Also handles merging of default template arguments from previous
declarations of function templates, for C++0x. However, we don't yet
make use of those default template arguments.
llvm-svn: 89872
All statements that involve conditions can now hold on to a separate
condition declaration (a VarDecl), and will use a DeclRefExpr
referring to that VarDecl for the condition expression. ForStmts now
have such a VarDecl (I'd missed those in previous commits).
Also, since this change reworks the Action interface for
if/while/switch/for, use FullExprArg for the full expressions in those
expressions, to ensure that we're emitting
Note that we are (still) not generating the right cleanups for
condition variables in for statements. That will be a follow-on
commit.
llvm-svn: 89817
into pretty much everything about overload resolution in order to wean
BuildDeclarationNameExpr off LookupResult::getAsSingleDecl(). Replace
UnresolvedFunctionNameExpr with UnresolvedLookupExpr, which generalizes the
idea of a non-member lookup that we haven't totally resolved yet, whether by
overloading, argument-dependent lookup, or (eventually) the presence of
a function template in the lookup results.
Incidentally fixes a problem with argument-dependent lookup where we were
still performing ADL even when the lookup results contained something from
a block scope.
Incidentally improves a diagnostic when using an ObjC ivar from a class method.
This just fell out from rewriting BuildDeclarationNameExpr's interaction with
lookup, and I'm too apathetic to break it out.
The only remaining uses of OverloadedFunctionDecl that I know of are in
TemplateName and MemberExpr.
llvm-svn: 89544
The following attributes are currently supported in C++0x attribute
lists (and in GNU ones as well):
- align() - semantics believed to be conformant to n3000, except for
redeclarations and what entities it may apply to
- final - semantics believed to be conformant to CWG issue 817's proposed
wording, except for redeclarations
- noreturn - semantics believed to be conformant to n3000, except for
redeclarations
- carries_dependency - currently ignored (this is an optimization hint)
llvm-svn: 89543
two classes, one for typenames and one for values; this seems to have some
support from Doug if not necessarily from the extremely-vague-on-this-point
standard. Track the location of the 'typename' keyword in a using-typename
decl. Make a new lookup result for unresolved values and deal with it in
most places.
llvm-svn: 89184
LookupResult RAII powers to diagnose ambiguity in the results. Other diagnostics
(e.g. access control and deprecation) will be moved to automatically trigger
during lookup as part of this same mechanism.
This abstraction makes it much easier to encapsulate aliasing declarations
(e.g. using declarations) inside the lookup system: eventually, lookup will
just produce the aliases in the LookupResult, and the standard access methods
will naturally strip the aliases off.
llvm-svn: 89027
sugared types. The basic problem is that our qualifier accessors
(getQualifiers, getCVRQualifiers, isConstQualified, etc.) only look at
the current QualType and not at any qualifiers that come from sugared
types, meaning that we won't see these qualifiers through, e.g.,
typedefs:
typedef const int CInt;
typedef CInt Self;
Self.isConstQualified() currently returns false!
Various bugs (e.g., PR5383) have cropped up all over the front end due
to such problems. I'm addressing this problem by splitting each
qualifier accessor into two versions:
- the "local" version only returns qualifiers on this particular
QualType instance
- the "normal" version that will eventually combine qualifiers from this
QualType instance with the qualifiers on the canonical type to
produce the full set of qualifiers.
This commit adds the local versions and switches a few callers from
the "normal" version (e.g., isConstQualified) over to the "local"
version (e.g., isLocalConstQualified) when that is the right thing to
do, e.g., because we're printing or serializing the qualifiers. Also,
switch a bunch of
Context.getCanonicalType(T1).getUnqualifiedType() == Context.getCanonicalType(T2).getQualifiedType()
expressions over to
Context.hasSameUnqualifiedType(T1, T2)
llvm-svn: 88969
- Also, perform calculated implicit cast sequences if they're determined to work. This finally diagnoses static_cast to ambiguous or implicit bases and fixes two long-standing fixmes in the test case. For the C-style cast, this requires propagating the access check suppression pretty deep into other functions.
- Pass the expressions for TryStaticCast and TryStaticImplicitCast by reference. This should lead to a better AST being emitted for such casts, and also fixes a memory leak, because CheckReferenceInit and PerformImplicitConversion wrap the node passed to them. These wrappers were previously lost.
llvm-svn: 88809
cast) that is converting to a class type, enumerate its constructors
as in any other direct initialization. This ensures that we get the
proper conversion sequence.
llvm-svn: 88751
like a copy constructor to the overload set, just ignore it. This
ensures that we don't try to use such a constructor as a copy
constructor *without* triggering diagnostics at the point of
declaration.
Note that we *do* diagnose such copy constructors when explicitly
written by the user (e.g., as an explicit specialization).
llvm-svn: 88733
instantiation), be sure to finish the expression statement by
providing a FullExprArg, making sure that temporaries get
destroyed. Fixes an obscure failure when parsing
llvm/LinkAllPasses.h.
llvm-svn: 88668
in "if" statements like:
if (CanQual<ReferenceType> RefType = T.getAs<ReferenceType>())
Thanks to Clang for pointing out this mistake :)
llvm-svn: 86995
handling template template parameters properly. This refactoring:
- Parses template template arguments as id-expressions, representing
the result of the parse as a template name (Action::TemplateTy)
rather than as an expression (lame!).
- Represents all parsed template arguments via a new parser-specific
type, ParsedTemplateArgument, which stores the kind of template
argument (type, non-type, template) along with all of the source
information about the template argument. This replaces an ad hoc
set of 3 vectors (one for a void*, which was either a type or an
expression; one for a bit telling whether the first was a type or
an expression; and one for a single source location pointing at
the template argument).
- Moves TemplateIdAnnotation into the new Parse/Template.h. It never
belonged in the Basic library anyway.
llvm-svn: 86708
and implicitly defined constructors. This has a number of benefits:
1. Less code.
2. Explicit and implicit constructors get the same diagnostics.
3. The AST explicitly contains constructor calls from implicit default
constructors. This allows handing some cases that previously weren't handled
correctly in IRGen without any additional code. Specifically, implicit default
constructors containing calls to constructors with default arguments are now
handled correctly.
llvm-svn: 86500
instead of all assignment operators. The mistake messes up IRGen because
it ends up assuming that the assignment operator is actually the implicit
copy assignment operator, and therefore tries to emit the RHS as an lvalue.
llvm-svn: 86307
(without complaining if it fails) to get proper semantics: reference
binding with a derived-to-base conversion and the enumeration of
constructors for user-defined conversions. There are probably more
cases to fix, but my prior attempt at statically ensuring that
complete-type checking always happens failed. Perhaps I'll try again.
With this change, Clang can parse include/llvm/*.h!
llvm-svn: 86129
representation of a C++ unqualified-id, along with a single parsing
function (Parser::ParseUnqualifiedId) that will parse all of the
various forms of unqualified-id in C++.
Replace the representation of the declarator name in Declarator with
the new UnqualifiedId class, simplifying declarator-id parsing
considerably and providing more source-location information to
Sema. In the future, I hope to migrate all of the other
unqualified-id-parsing code over to this single representation, then
begin to merge actions that are currently only different because we
didn't have a unqualified notion of the name in the parser.
llvm-svn: 85851
of ConvertDeclSpecToType, which I'd like to keep private to SemaType.cpp.
We do this by cons'ing up a trivial Declarator for the type.
John, please review.
llvm-svn: 85060
the DeclaratorInfo, one for semantic analysis), just build a single type whose
canonical type will reflect the semantic analysis (assuming the type is
well-formed, of course).
To make that work, make a few changes to the type system:
* allow the nominal pointee type of a reference type to be a (possibly sugared)
reference type. Also, preserve the original spelling of the reference type.
Both of these can be ignored on canonical reference types.
* Remove ObjCProtocolListType and preserve the associated source information on
the various ObjC TypeLocs. Preserve the spelling of protocol lists except in
the canonical form.
* Preserve some level of source type structure on parameter types, but
canonicalize on the canonical function type. This is still a WIP.
Drops code size, makes strides towards accurate source location representation,
slight (~1.7%) progression on Cocoa.h because of complexity drop.
llvm-svn: 84907
what we found when we looked into <blah>", where <blah> is a
DeclContext*. We can now format DeclContext*'s in nice ways, e.g.,
"namespace N", "the global namespace", "'class Foo'".
This is part of PR3990, but we're not quite there yet.
llvm-svn: 84028
function templates.
This commit ensures that friend function templates are constructed as
FunctionTemplateDecls rather than partial FunctionDecls (as they
previously were). It then implements template instantiation for friend
function templates, injecting the friend function template only when
no previous declaration exists at the time of instantiation.
Oh, and make sure that explicit specialization declarations are not
friends.
llvm-svn: 83970
The exception specification of the assignee must be the same or a subset of the target. In addition, exception specifications on arguments and return types must be equivalent, but this is not implemented yet.
This currently produces two diagnostics for every invalid assignment/initialization, due to the diagnostic produced outside PerformImplicitConversion, e.g. in CheckSingleInitializer. I don't know how to suppress this; in any case I think it is the wrong place for a diagnostic, since there are other diagnostics produced inside the function. So I'm leaving it as it is for the moment.
llvm-svn: 83710
for bases, members, overridden virtual methods, etc. The operations
isDerivedFrom and lookupInBases are now provided by CXXRecordDecl,
rather than by Sema, so that CodeGen and other clients can use them
directly.
llvm-svn: 83396
concrete types. Use unqualified desugaring for getAs<> and sundry.
Fix a few users to either not desugar or use qualified desugar, as seemed
appropriate. Removed Type's qualified desugar method, as it was easy
to accidentally use instead of QualType's.
llvm-svn: 83116
class templates. We now treat friend class templates much more like
normal class templates, except that they still get special name lookup
rules. Fixes PR5057 and eliminates a bunch of spurious diagnostics in
<iostream>.
llvm-svn: 82848
Type hierarchy. Demote 'volatile' to extended-qualifier status. Audit our
use of qualifiers and fix a few places that weren't dealing with qualifiers
quite right; many more remain.
llvm-svn: 82705
It uses a recent API to find inherited conversion functions to do
the initializer to reference lvalue conversion (and removes a FIXME).
It issues the ambiguity diagnostics when multiple conversions are found.
WIP.
llvm-svn: 82649
Several of the existing methods were identical to their respective
specializations, and so have been removed entirely. Several more 'leaf'
optimizations were introduced.
The getAsFoo() methods which imposed extra conditions, like
getAsObjCInterfacePointerType(), have been left in place.
llvm-svn: 82501
give them the appropriate exception specifications. This,
unfortunately, requires us to maintain and/or implicitly generate
handles to namespace "std" and the class "std::bad_alloc". However,
every other approach I've come up with was more hackish, and this
standard requirement itself is quite the hack.
Fixes PR4829.
llvm-svn: 81939
- Diagnose attempts to add default arguments to templates (or member
functions of templates) after the initial declaration (DR217).
- Improve diagnostics when a default argument is redefined. Now, the
note will always point at the place where the default argument was
previously defined, rather than pointing to the most recent
declaration of the function.
llvm-svn: 81548
such initializations properly convert constructor arguments and fill
in default arguments where necessary. This also makes the ownership
model more clear.
llvm-svn: 81394
Now that parsing, semantic analysis, and (I think) code generation of
pseudo-destructor expressions and explicit destructor calls works,
update the example-dynarray.cpp test to destroy the objects it
allocates and update the test to actually compile + link.
The code seems correct, but the Clang-compiled version dies with a
malloc error. Time to debug!
llvm-svn: 81025
declarations of same, introduce a single AST class and add appropriate bits
(encoded in the namespace) for whether a decl is "real" or not. Much hackery
about previously-declared / not-previously-declared, but it's essentially
mandated by the standard that friends alter lookup, and this is at least
fairly non-intrusive.
Refactor the Sema methods specific to friends for cleaner flow and less nesting.
Incidentally solve a few bugs, but I remain confident that we can put them back.
llvm-svn: 80353
that type. Note that we do not produce a diagnostic if the type is
incomplete; rather, we just don't look for conversion functions. Fixes PR4660.
llvm-svn: 79919
and will participate in overload resolution. Unify the instantiation
of CXXMethodDecls and CXXConstructorDecls, which had already gotten
out-of-sync.
llvm-svn: 79658
Benjamin Kramer