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56d0c6e3f5
PR c++/7586
* pt.c (tsubst): Handle typedefs by looking for the specialization.
(retrieve_specialization): Only tagged types use
DECL_TEMPLATE_INSTANTIATIONS.
(instantiate_class_template): Push nested classes too.
(tsubst_decl) [TYPE_DECL]: Only check for canonical decl for
tagged types.
* cp-tree.h (MAYBE_TAGGED_TYPE_P): New macro.
* init.c (is_aggr_type): Remove redundant tests.
* class.c (push_nested_class): Use CLASS_TYPE_P.
From-SVN: r128621
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