Re: [PATCH] c++ modules: handle CONCEPT_DECL in node_template_info [PR102963]

[Nathan Sidwell <nathan@acm.org>]

On 10/20/22 10:07, Patrick Palka wrote:
> Here node_template_info is overlooking that CONCEPT_DECL has TEMPLATE_INFO
> too, which makes get_originating_module_decl for the CONCEPT_DECL fail to
> return the corresponding TEMPLATE_DECL, which leads to an ICE from
> import_entity_index while pretty printing the CONCEPT_DECL's module
> suffix as part of the failed static assert diagnostic.

ok

> 
> Tested on x86_64-pc-linux-gnu, does this look OK for trunk?
> 
> 	PR c++/102963
> 
> gcc/cp/ChangeLog:
> 
> 	* module.cc (node_template_info): Handle CONCEPT_DECL.
> 
> gcc/testsuite/ChangeLog:
> 
> 	* g++.dg/modules/concept-7_a.C: New test.
> 	* g++.dg/modules/concept-7_b.C: New test.
> ---
>   gcc/cp/module.cc                           | 3 ++-
>   gcc/testsuite/g++.dg/modules/concept-7_a.C | 7 +++++++
>   gcc/testsuite/g++.dg/modules/concept-7_b.C | 7 +++++++
>   3 files changed, 16 insertions(+), 1 deletion(-)
>   create mode 100644 gcc/testsuite/g++.dg/modules/concept-7_a.C
>   create mode 100644 gcc/testsuite/g++.dg/modules/concept-7_b.C
> 
> diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
> index bb406a5cf01..dfed0a5ef89 100644
> --- a/gcc/cp/module.cc
> +++ b/gcc/cp/module.cc
> @@ -4046,7 +4046,8 @@ node_template_info (tree decl, int &use)
>   	       || TREE_CODE (decl) == TYPE_DECL
>   	       || TREE_CODE (decl) == FUNCTION_DECL
>   	       || TREE_CODE (decl) == FIELD_DECL
> -	       || TREE_CODE (decl) == TEMPLATE_DECL))
> +	       || TREE_CODE (decl) == TEMPLATE_DECL
> +	       || TREE_CODE (decl) == CONCEPT_DECL))
>       {
>         use_tpl = DECL_USE_TEMPLATE (decl);
>         ti = DECL_TEMPLATE_INFO (decl);
> diff --git a/gcc/testsuite/g++.dg/modules/concept-7_a.C b/gcc/testsuite/g++.dg/modules/concept-7_a.C
> new file mode 100644
> index 00000000000..a39b31bf7f0
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/modules/concept-7_a.C
> @@ -0,0 +1,7 @@
> +// PR c++/102963
> +// { dg-additional-options "-fmodules-ts -fconcepts" }
> +// { dg-module-cmi pr102963 }
> +
> +export module pr102963;
> +
> +export template<class T> concept C = __is_same(T, int);
> diff --git a/gcc/testsuite/g++.dg/modules/concept-7_b.C b/gcc/testsuite/g++.dg/modules/concept-7_b.C
> new file mode 100644
> index 00000000000..1f81208ebd5
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/modules/concept-7_b.C
> @@ -0,0 +1,7 @@
> +// PR c++/102963
> +// { dg-additional-options "-fmodules-ts -fconcepts" }
> +
> +import pr102963;
> +
> +static_assert(C<int>);
> +static_assert(C<void>); // { dg-error "static assert" }

-- 
Nathan Sidwell