[Bug c++/29939] Add rvalue references (C++0x)

["dgregor at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from dgregor at gcc dot gnu dot org  2007-05-31 01:18 -------
Subject: Bug 29939

Author: dgregor
Date: Thu May 31 01:18:22 2007
New Revision: 125211

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=125211
Log:
2007-05-30  Russell Yanofsky <russ@yanofsky.org>
            Douglas Gregor <doug.gregor@gmail.com>
            Pedro Lamarao <pedro.lamarao@mndfck.org>
            Howard Hinnant <howard.hinnant@gmail.com>

        PR c++/7412
        PR c++/29939
        * g++.dg/cpp0x/rv8p.C: New.
        * g++.dg/cpp0x/temp-constructor-bug.C: New.
        * g++.dg/cpp0x/cast-bug.C: New.
        * g++.dg/cpp0x/elision_weak.C: New.
        * g++.dg/cpp0x/collapse-bug.C: New.
        * g++.dg/cpp0x/rv3p.C: New.
        * g++.dg/cpp0x/rv7n.C: New.
        * g++.dg/cpp0x/overload-conv-1.C: New.
        * g++.dg/cpp0x/rv2n.C: New.
        * g++.dg/cpp0x/deduce.C: New.
        * g++.dg/cpp0x/temp-va-arg-bug.C: New.
        * g++.dg/cpp0x/rv6p.C: New.
        * g++.dg/cpp0x/template_deduction.C: New.
        * g++.dg/cpp0x/implicit-copy.C: New.
        * g++.dg/cpp0x/rv1p.C: New.
        * g++.dg/cpp0x/cast.C: New.
        * g++.dg/cpp0x/rv5n.C: New.
        * g++.dg/cpp0x/collapse.C: New.
        * g++.dg/cpp0x/overload-conv-2.C: New.
        * g++.dg/cpp0x/rv4p.C: New.
        * g++.dg/cpp0x/rvo.C: New.
        * g++.dg/cpp0x/iop.C: New.
        * g++.dg/cpp0x/rv3n.C: New.
        * g++.dg/cpp0x/rv7p.C: New.
        * g++.dg/cpp0x/reference_collapsing.C: New.
        * g++.dg/cpp0x/overload.C: New.
        * g++.dg/cpp0x/named.C: New.
        * g++.dg/cpp0x/rv2p.C: New.
        * g++.dg/cpp0x/rv6n.C: New.
        * g++.dg/cpp0x/not_special.C: New.
        * g++.dg/cpp0x/bind.C: New.
        * g++.dg/cpp0x/rv1n.C: New.
        * g++.dg/cpp0x/rv5p.C: New.
        * g++.dg/cpp0x/elision.C: New.
        * g++.dg/cpp0x/named_refs.C: New.
        * g++.dg/cpp0x/unnamed_refs.C: New.
        * g++.dg/cpp0x/rv4n.C: New.
        * g++.dg/cpp0x/elision_neg.C: New.
        * g++.dg/init/copy7.C: Run in C++98 mode.
        * g++.dg/overload/arg1.C: Ditto.
        * g++.dg/overload/arg4.C: Ditto.

2007-05-30  Russell Yanofsky <russ@yanofsky.org>
            Douglas Gregor <doug.gregor@gmail.com>
            Pedro Lamarao <pedro.lamarao@mndfck.org>
            Howard Hinnant <howard.hinnant@gmail.com>

        PR c++/7412
        PR c++/29939
        * typeck.c (comptypes): Don't consider rvalue and lvalue
        reference types to be equivalent.
        (check_return_expr): Move from certain lvalues when returning
        them.
        * decl.c (grokdeclarator): Implement reference collapsing.
        (copy_fn_p): Don't consider constructors taking rvalue references
        to be copy constructors.
        (move_fn_p): New.
        * call.c (conversion): New "rvaluedness_matches_p" member.
        (convert_class_to_reference): Require reference type as first
        parameter instead of base type.
        (reference_binding): Add logic to handle rvalue references.
        (implicit_conversion): Update inaccurate comment.
        (convert_like_real): Disable creation of temporaries that are
        impossible to initialize for types with move constructors.
        (build_over_call): Elide move constructors when possible.
        (maybe_handle_implicit_object): Set "rvaluedness_matches_p".
        (maybe_handle_ref_bind): Return conversion instead of type node.
        (compare_ics): Add logic to use "rvaluedness_matches_p" values to
        determine preferred conversion sequences.
        * cp-tree.h (TYPE_REF_IS_RVALUE): New.
        (LOOKUP_PREFER_RVALUE): New.
        (DECL_MOVE_CONSTRUCTOR_P): New.
        (struct cp_declarator): Add "reference" member for reference
        types, with new "rvalue_ref" flag.
        (cp_build_reference_type): Declare.
        (move_fn_p): Declare.
        * error.c (dump_type_prefix): Format rvalue reference types
        correctly in error messages.
        * except.c (build_throw): Move from certain lvalues when
        throwing.
        * mangle.c (write_type): Mangle rvalue references differently
        than regular references.
        * parser.c (make_reference_declarator): Add boolean parameter for
        rvalue references.
        (cp_parser_make_indirect_declarator): New.
        (cp_parser_new_declarator_opt): Call
        cp_parser_make_indirect_declarator. 
        (cp_parser_conversion_declarator_opt): Ditto.
        (cp_parser_declarator): Ditto.
        (cp_parser_ptr_operator): Parse "&&" tokens into rvalue reference
        declarators.
        * pt.c (tsubst): Implement reference collapsing.
        (maybe_adjust_types_for_deduction): Implement special template
        parameter deduction rule for rvalue references.
        (type_unification_real): Update calls to
        maybe_adjust_types_for_deduction.
        (try_one_overload): Ditto.
        (unify_pack_expansion): Ditto.
        * tree.c (lvalue_p_1): Handle rvalue reference types.
        (cp_build_reference_type): New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/bind.C
    trunk/gcc/testsuite/g++.dg/cpp0x/cast-bug.C
    trunk/gcc/testsuite/g++.dg/cpp0x/cast.C
    trunk/gcc/testsuite/g++.dg/cpp0x/collapse-bug.C
    trunk/gcc/testsuite/g++.dg/cpp0x/collapse.C
    trunk/gcc/testsuite/g++.dg/cpp0x/deduce.C
    trunk/gcc/testsuite/g++.dg/cpp0x/elision.C
    trunk/gcc/testsuite/g++.dg/cpp0x/elision_neg.C
    trunk/gcc/testsuite/g++.dg/cpp0x/elision_weak.C
    trunk/gcc/testsuite/g++.dg/cpp0x/implicit-copy.C
    trunk/gcc/testsuite/g++.dg/cpp0x/iop.C
    trunk/gcc/testsuite/g++.dg/cpp0x/named.C
    trunk/gcc/testsuite/g++.dg/cpp0x/named_refs.C
    trunk/gcc/testsuite/g++.dg/cpp0x/not_special.C
    trunk/gcc/testsuite/g++.dg/cpp0x/overload-conv-1.C
    trunk/gcc/testsuite/g++.dg/cpp0x/overload-conv-2.C
    trunk/gcc/testsuite/g++.dg/cpp0x/overload.C
    trunk/gcc/testsuite/g++.dg/cpp0x/reference_collapsing.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv1n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv1p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv2n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv2p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv3n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv3p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv4n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv4p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv5n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv5p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv6n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv6p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv7n.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv7p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rv8p.C
    trunk/gcc/testsuite/g++.dg/cpp0x/rvo.C
    trunk/gcc/testsuite/g++.dg/cpp0x/temp-constructor-bug.C
    trunk/gcc/testsuite/g++.dg/cpp0x/temp-va-arg-bug.C
    trunk/gcc/testsuite/g++.dg/cpp0x/template_deduction.C
    trunk/gcc/testsuite/g++.dg/cpp0x/unnamed_refs.C
Modified:
    trunk/ChangeLog
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/error.c
    trunk/gcc/cp/except.c
    trunk/gcc/cp/mangle.c
    trunk/gcc/cp/parser.c
    trunk/gcc/cp/pt.c
    trunk/gcc/cp/tree.c
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/init/copy7.C
    trunk/gcc/testsuite/g++.dg/overload/arg1.C
    trunk/gcc/testsuite/g++.dg/overload/arg4.C


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29939