Andrew Sutton <andrew.n.sut...@gmail.com> writes:

| I added a new macro to replace the use of TREE_TYPE to get
| constraints. It's called TEMPLATE_PARMS_CONSTRAINTS. Patch attached:
| 
| 2013-09-10  Andrew Sutton  <andrew.n.sut...@gmail.com>
|     * gcc/cp/cp-tree.h (TEMPLATE_PARMS_CONSTRAINTS): New.
|     * gcc/cp/parser.c (cp_parser_template_declaration_after_export),
|         (cp_parser_type_parameter): Use TEMPLATE_PARMS_CONSTRAINTS.
|     * gcc/cp/semantics.c (fixup_template_scope): Use
|          TEMPLATE_PARMS_CONSTRAINTS.

| +// Access template constraints associated with the template
| +// parameter lists. Template parameter constraints are stored in
| +// the TREE_TYPE of list.

Hmm, we can have several levels of template parameter list.  What about:

  // Logical constraints on the template parameters introduced at a
  // given template parameter list level indicated by NODE.

Patch OK with that change.

Thanks,

-- Gaby

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