[PATCH v2] c++: improve print_node of PTRMEM_CST

[Jason Merrill]

On 11/4/21 16:32, Jakub Jelinek wrote:
> On Thu, Nov 04, 2021 at 11:52:34AM -0400, Jason Merrill via Gcc-patches wrote:
>> It's been inconvenient that pretty-printing of PTRMEM_CST didn't display
>> what member the constant refers to.
>>
>> Adding that is complicated by the absence of a langhook for CONSTANT_CLASS_P
>> nodes; the simplest fix for that is to use the tcc_exceptional hook for
>> tcc_constant as well.
>>
>> Tested x86_64-pc-linux-gnu.  OK for trunk, or should I add a new hook for
>> constants?
>>
>> gcc/cp/ChangeLog:
>>
>> 	* ptree.c (cxx_print_xnode): Handle PTRMEM_CST.
>>
>> gcc/ChangeLog:
>>
>> 	* print-tree.c (print_node): Also call print_xnode hook for
>> 	tcc_constant class.
> 
> I think using the same langhook is fine, but in that case certainly
>    /* Called by print_tree when there is a tree of class tcc_exceptional
>       that it doesn't know how to display.  */
> should be adjusted so that it mentions also tcc_constant.

Done.

> And maybe rename it from print_xnode to print_node?

I think changing the comment is enough, it's still just exceptional and 
constant.

This is what I'm pushing:
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