cp-tree.h, tree.c: New function non_cast_lvalue_p.

cp-tree.h, tree.c: New function non_cast_lvalue_p.

2002-09-13  Matt Austern  <austern@apple.com>
        * cp/cp-tree.h, cp/tree.c: New function non_cast_lvalue_p.
        * cp/call.c: Change call-by-const-reference mechanism to use
        non_cast_lvalue_p when deciding whether the create a temporary.
        We need a temporary when passing, e.g. (long) x by const ref.
        * testsuite/g++.dg/other/constref[12].C: New, regression tests for
        passing a cast expression to a function by const reference.

From-SVN: r57115