Fixes for library headers.

[Dirk Herrmann]

Hello!

With the headerfile installed by egcs-970907 some warnings occur and
some things are still not WP96 compliant. (Neither are they in the SGI
implementation.)

Fixes with explanation:

A) operator-> for list iterators:
diff ~egcs/include/g++/list.h list.h
66a67
>   pointer operator->() const { return &(*node).data; }


B) fix set::erase to comply with WP96:
diff /automatix/home/dirk/pub/egcs/include/g++/set.h set.h
126c126,128
<   void erase(iterator position) { 
---
>   iterator erase(iterator position) { 
>     iterator toReturn = position;
>     ++toReturn;
127a130
>     return toReturn;


C) operator-> for tree iterators,
D) order of member initializers in constructors corrected.
diff /automatix/home/dirk/pub/egcs/include/g++/tree.h tree.h
156a157
>   Value* operator->() const { return &link_type(node)->value_field; }
514c515
<       : key_compare(comp), node_count(0) { init(); }
---
>       : node_count(0), key_compare(comp) { init(); }
517c518
<       : key_compare(x.key_compare), node_count(0) { 
---
>       : node_count(0), key_compare(x.key_compare) { 


I hope you don't need anything signed for these fixes ;-)


Best regards, Dirk Herrmann
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