* cp-tree.h (language_lvalue_valid): Remove.
* decl.c (grokdeclarator): Don't disallow references to functions.
* tree.c (lvalue_p_1): New function, combining duplicated
code from ...
(lvalue_p): Use it.
(real_lvalue_p): Likewise.
* typeck.c (language_lvalue_valid): Remove.
(build_modify_expr): Treat FUNCTION_TYPEs as readonly, even though
they don't have TREE_READONLY set.
* typeck2.c (readonly_error): Add case for FUNCTION_DECLs.
From-SVN: r22583
