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- Comparing template parameter lists to determine if we have a redeclaration
- Comparing template parameter lists to determine if we have equivalent
template template parameters
- Comparing template parameter lists to determine whether a template
template argument is valid for a given template template parameter.
Previously, we did not distinguish between the last two cases, which
got us into trouble when we were looking for exact type matches
between the types of non-type template parameters that were dependent
types. Now we do, so we properly delay checking of template template
arguments until instantiation time.
Also, fix an accidental fall-through in a case statement that was
causing crashes.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86992 91177308-0d34-0410-b5e6-96231b3b80d8
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template template parameter, substitute any prior template arguments
into the template template parameter. This, for example, allows us to
properly check the template template argument for a class such as:
template<typename T, template<T Value> class X> struct Foo;
The actual implementation of this feature was trivial; most of the
change is dedicated to giving decent diagnostics when this
substitution goes horribly wrong. We now get a note like:
note: while substituting prior template arguments into template
template parameter 'X' [with T = float]
As part of this change, enabled some very pedantic checking when
comparing template template parameter lists, which shook out a bug in
our overly-eager checking of default arguments of template template
parameters. We now perform only minimal checking of such default
arguments when they are initially parsed.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86864 91177308-0d34-0410-b5e6-96231b3b80d8
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template template parameters and dependent template names. For
example, the oft-mentioned
typename MetaFun::template apply<T1, T2>::type
can now be instantiated, with the appropriate name lookup for "apply".
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68128 91177308-0d34-0410-b5e6-96231b3b80d8
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