templates. We now distinguish between an explicit instantiation
declaration and an explicit instantiation definition, and know not to
instantiate explicit instantiation declarations. Unfortunately, there
is some remaining confusion w.r.t. instantiation of out-of-line member
function definitions that causes trouble here.
llvm-svn: 81053
involve qualified names, e.g., x->Base::f. We now maintain enough
information in the AST to compare the results of the name lookup of
"Base" in the scope of the postfix-expression (determined at template
definition time) and in the type of the object expression.
llvm-svn: 80953
When performing template instantiation of the definitions of member
templates (or members thereof), we build a data structure containing
the template arguments from each "level" of template
instantiation. During template instantiation, we substitute all levels
of template arguments simultaneously.
llvm-svn: 80389
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
transform, then use the result for template instantiation. The generic
transformation fixes a few issues:
- It copes better with template template parameters and member
templates (when they're implemented).
- The logic used to replace template template parameters with their
arguments is now centralized in TransformDecl, so that it will apply
for other declaration-instantiation steps.
- The error-recovery strategy is normalized now, so that any error
results in a NULL TemplateName.
llvm-svn: 78292
general tree transformation. Also, implement template instantiation
for parameter packs.
In addition, introduce logic to enter the appropriate context for
subexpressions that are not potentially evaluated.
llvm-svn: 78114
transformation template (TreeTransform) that handles the
transformation and reconstruction of AST nodes. Template instantiation
for types is a (relatively small) customization of the generic tree
transformation.
llvm-svn: 78071
template partial specialization. Then, use those template arguments
when instantiating members of that class template partial
specialization. Fixes PR4607.
llvm-svn: 77925
Note that this also fixes a bug that affects non-template code, where we
were not treating out-of-line static data members are "file-scope" variables,
and therefore not checking their initializers.
llvm-svn: 77002
by distinguishing between substitution that occurs for template
argument deduction vs. explicitly-specifiad template arguments. This
is used both to improve diagnostics and to make sure we only provide
SFINAE in those cases where SFINAE should apply.
In addition, deal with the sticky issue where SFINAE only considers
substitution of template arguments into the *type* of a function
template; we need to issue hard errors beyond this point, as
test/SemaTemplate/operator-template.cpp illustrates.
llvm-svn: 74651
Remove ASTContext parameter from DeclContext's methods. This change cascaded down to other Decl's methods and changes to call sites started "escalating".
Timings using pre-tokenized "cocoa.h" showed only a ~1% increase in time run between and after this commit.
llvm-svn: 74506
of template instantiation, we were dropping cv-qualifiers on the
instantiated type in a few places. This change reshuffles the
type-instantiation code a little bit so that there's a single place
where we add qualifiers to the instantiated type, so that we won't end
up with this same bug in the future.
llvm-svn: 74331
For a FunctionDecl that has been instantiated due to template argument
deduction, we now store the primary template from which it was
instantiated and the deduced template arguments. From this
information, we can instantiate the body of the function template.
llvm-svn: 74232
compilation, and (hopefully) introduce RAII objects for changing the
"potentially evaluated" state at all of the necessary places within
Sema and Parser. Other changes:
- Set the unevaluated/potentially-evaluated context appropriately
during template instantiation.
- We now recognize three different states while parsing or
instantiating expressions: unevaluated, potentially evaluated, and
potentially potentially evaluated (for C++'s typeid).
- When we're in a potentially potentially-evaluated context, queue
up MarkDeclarationReferenced calls in a stack. For C++ typeid
expressions that are potentially evaluated, we will play back
these MarkDeclarationReferenced calls when we exit the
corresponding potentially potentially-evaluated context.
- Non-type template arguments are now parsed as constant
expressions, so they are not potentially-evaluated.
llvm-svn: 73899
Add a type (ObjCObjectPointerType) and remove a type (ObjCQualifiedIdType).
This large/tedious patch is just a first step. Next step is to remove ObjCQualifiedInterfaceType. After that, I will remove the magic TypedefType for 'id' (installed by Sema). This work will enable various simplifications throughout clang (when dealing with ObjC types).
No functionality change.
llvm-svn: 73649
Implement support for C++ Substitution Failure Is Not An Error
(SFINAE), which says that errors that occur during template argument
deduction do *not* produce diagnostics and do not necessarily make a
program ill-formed. Instead, template argument deduction silently
fails. This is currently implemented for template argument deduction
during matching of class template partial specializations, although
the mechanism will also apply to template argument deduction for
function templates. The scheme is simple:
- If we are in a template argument deduction context, any diagnostic
that is considered a SFINAE error (or warning) will be
suppressed. The error will be propagated up the call stack via the
normal means.
- By default, all warnings and errors are SFINAE errors. Add the
NoSFINAE class to a diagnostic in the .td file to make it a hard
error (e.g., for access-control violations).
Note that, to make this fully work, every place in Sema that emits an
error *and then immediately recovers* will need to check
Sema::isSFINAEContext() to determine whether it must immediately
return an error rather than recovering.
llvm-svn: 73332
I'm not completely sure this is the right way to fix this issue, but it seems
reasonable, and it's consistent with the non-template code for this
construct.
llvm-svn: 73285
argument deduction failed. For example, given
template<typename T> struct is_same<T, T> { ... };
template argument deduction will fail for is_same<int, float>, and now
reports enough information
Right now, we don't do anything with this extra information, but it
can be used for informative diagnostics that say, e.g., "template
argument deduction failed because T was deduced to 'int' in one
context and 'float' in another".
llvm-svn: 73237
partial specialization, substitute those template arguments back into
the template arguments of the class template partial specialization to
see if the results still match the original template arguments.
This code is more general than it needs to be, since we don't yet
diagnose C++ [temp.class.spec]p9. However, it's likely to be needed
for function templates.
llvm-svn: 73196
Anders Carlsson