This paper presents a quick summary of all papers submitted to WG21 for consideration by the Evolution Working Group, with an indication of their progress towards inclusion in the next C++ Standard. It is based on the post-Oxford 2007 mailing, but contains references to final papers voted into the working paper and made available during that meeting.
There are no library issue here, unless highlighted by the Registration Document submitted following the Portland meeting. Otherwise this list focuses entirely on changes affecting clauses 1 -> 16.
Note that while the deadline for new proposals for C++09 is long past, it is not unusual to split a specific feature out of an existing proposal, to ease their progress. Likewise, existing Core Working Group issues may grow large enough to merit a paper that would not have previously shown on this list.
Proposals in a green font have advanced a category since the last meeting, those in red have moved back, while those in yellow are new or have been updated since the last meeting.
Issues with a green background have been highlighted as the features that will be delivered in the next version of the standard in the Registration Document.
| WG21 Number(s) | Title | Authors |
| Integrated into working paper | ||
| These propsals are already incorporated into the latest working paper, N2134, or the project editor has been directed to include them in the next draught. | ||
| N1377 N1385 N1690 N1770 N1855 N1952 N2118 | A Proposal to Add an Rvalue Reference to the C++ Language | H. Hinnant, P. Dimov, D. Abrahams, J. Adamczyk, A. Hommel |
| N1381 N1604 N1617 N1720 | static_assert | R. Klarer, J. Maddock, B. Dawes, H. Hinnant |
| N1406 N1449 N1451 N1489 N2112 N2258 | Template aliases for C++ | B. Stroustrup, G. Dos Reis, Mat Marcus, Walter E. Brown, Herb Sutter |
| N1448 N1960 N1987 | Extern template | Matt Marcus, Garbriel Dos Reis, John Spicer |
| N1483 N1603 N1704 N2080 N2152 N2191 N2242 | Variadic Templates | D. Gregor, J. Järvi, G. Powell |
| N1520 N1616 N1722 N1791 | Extended friend Declarations | William M. Miller |
| N1545 N1566 N1653 | Synchronizing the C++ preprocessor with C99 | Clark Nelson, Paul Mensonides |
| N1564 N1627 | "Conditionally-Supported Behavior" | William M. Miller |
| N1727 | Changing Undefined Behavior into Diagnosable Errors | William M. Miller |
| N1565 N1693 N1735 N1811 | Adding the long long type to C++ | J. Stephen Adamczyk |
| N1746 N1988 | Adding extended integer types to C++ | J. Stephen Adamczyk |
| N1581 N1618 N1895 N1986 | Delegating Constructors | H. Sutter, F. Glassborow |
| N1610 | Clarification of Initialization of Class Objects by rvalues | D. Abrahams, G. Powell |
| N1628 N1823 N1955 N2018 N2149 N2249 | New Character Types in C++ | Lawrence Crowl |
| N1649 N1699 N1757 | Right Angle Brackets | Daveed Vandevoorde |
| N1721 N1794 N1894 N1984 | Deducing the type of variable from its initializer expression | J. Jaarvi, B. Stroustrup, G. Dos Reis |
| N1737 | A Proposal to Restore Multi-declarator auto Declarations | Walter E. Brown |
| N1944 N2052 N2171 N2239 | A finer-grained alternative to sequence points | Clark Nelson |
| N2150 N2253 | Extending sizeof | Jens Maurer |
| Final wording under review in Core | ||
| These papers have essentially passed final scrutiny in Core Working group, but are blocked by existing items on the issues list. Full wording is available. It is anticipated these papers will move into working paper with minimal editting as the Issues are resolved, however it remains possible that these papers could be sent back for further revision. | ||
| N1478 N1527 N1607 N1705 N1978 N2115 | Decltype (and auto) | J. Järvi, B. Stroustrup, D. Gregor, J. Siek, G. Dos Reis |
| N1521 N1972 N1980 N2116 N2235 | Generalized Constant Expressions | Gabriel Dos Reis |
| N1970 N2202 N2251 | Proposed addition of __func__ predefined identifier from C99 | Alisdair Meredith, J Maurer |
| Proposed wording under review in Core | ||
| These papers are undergoing final scrutiny in Core Working group, and have all been reviewed at least once. Full wording is available, and has been reviewed at least once by the CWG. However, some draughting issues remain to be resolved before moving into the Working Paper. | ||
| N1488 N1601 N2214 | A name for the null pointer: nullptr | H. Sutter, B. Stroustrup |
| N1509 N1890 N1919 N2100 N2215 | Initializer lists | Bjarne Stroustrup, G. Dos Reis |
| N1513 N1579 N1719 N2213 | Strongly Typed Enums | H. Sutter, D. Miller, B. Stroustrup |
| N1546 N1877 N1971 N2140 N2165 N2252 | Adding Alignment Support to the C++ Programming Language | Attila (Farkas) Fehér, C. Nelson |
| N1898 N2119 N2203 N2254 | Inheriting Constructors | M. Wong, A. Meredith, J. Maurer |
| N2052 N2171 | Sequencing and the concurrency memory model | Clark Nelson, Hans Boehm |
| N2062 N2102 N2172 N2230 | PODs unstrung | Beman Dawes |
| N2210 | Defaulted and Deleted Functions | Lawrence Crowl |
| Blessed by evolution - wording available for initial review by Core | ||
| The design of these features is deemed complete and accepted by EWG, and there is a paper with complete wording for Core to review. However, CWG have not yet devoted any committee time to this issue. Typically papers in this state have been accepted by EWG at the previous meeting, or the version with proposed wording was not avaiable by the pre-meeting mailing. | ||
| N1592 N2223 | Explicit Conversion Operators | Lois Goldthwaite, Michael Wong |
| N1874 N1966 N2147 N2280 | Thread-Local Storage | Lawrence Crowl |
| N2042 N2081 N2193 | Concepts (unified proposal) | Doug Gregor, Bjarne Stroustrup |
| N2053 N2146 | Raw String Literals | Beman Dawes |
| N2159 N2209 | UTF8 Literals | Lawrence Crowl |
| Core issues addressed by specific papers | ||
| The design of these features are being handled by the Core Working Group as part of their issue resolution process, but the issue is large enough to prompt a full paper. | ||
| N1528 | Syntactic Disambiguation Using the Template Keyword | John H. Spicer |
| N2170 | Universal Character Names in Literals | Lawrence Crowl |
| Active topics in Evolution | ||
| These topics are still actively being developed, and there is a clear intention to incorporate each one in the next standard. | ||
| N1401; N2016 N2047 N2145 | Atomic operations with multi-threaded environments | Jan Kristoffersen; Nick McLaren; Hans Boehm, Lawrence Crowl |
| N2177 | Sequential Consistency for Atomics | Hans-J. Boehm |
| N2195 | Proposed Text for Chapter 29, Atomic Operations Library | Peter Dimov |
| N2090; N2094 | A minimal threading API for C++0x | Peter Dimov; Howard Hinnant |
| N2139 | Thoughts on a Thread Library for C++ | Anthony Williams |
| N2178 | Proposed Text for Chapter 30, Thread Support Library | Peter Dimov |
| N2285 | A Multi-threading Library for Standard C++, Revision 2 | Pete Becker |
| N2185 | Proposed Text for Parallel Task Execution | Peter Dimov |
| N2096 N2179 | Propagating exceptions when joining threads | Peter Dimov |
| N2184 | Thread Launching for C++0X | Howard Hinnant |
| N2148 | Dynamic initialization and concurrency | Lawrence Crowl |
| N2153 N2237 | Memory model for weak ordering | Raúl Silvera, Michael Wong, Paul McKenney, Bob Blainey |
| N2260 | C++ Data-Dependency Ordering | Paul E. McKenney |
| N2262 | Explicit Memory Fences | R. Silvera, P. Dimov |
| N2272 | Optional Sequential Consistency | Nick Maclaren |
| N2273 N2275 | Non-Memory Actions | Nick Maclaren |
| N2274 | Object Aliasing and Threads | Nick Maclaren |
| N2276 | Thread Pools and Futures | Anthony Williams |
| N1427 N1945 N2187 | Making Local Classes more Useful | Anthony Williams |
| N1511 N1892 N2282 | Extensible Literals | I. McIntosh, M. Wong, R. Mak, R.Klarer Bjarne Stroustrup |
| N1671 N2200 | Overloading Operator.() & Operator.*() | G. Powell, D. Gregor, J. Jarvi |
| N1676; N2200 | Non-member overloaded copy assignment operator | Bronek Kozicki; G. Powell, D. Gregor, J. Jarvi |
| N1784 N1821 | Extending Move Semantics To *this (Revision 2) | D. Vandevoorde, B. Kozicki |
| N1827 N2108 | An Explicit Override Syntax for C++ | C. Uzdavinis, A. Meredith, Jens Maurer |
| N1833 N1943 N2128 N2129 N2286 N2287 | Transparent Garbage Collection for C++ | H. Boehm, M. Spertus |
| N2261 | Optimization-robust finalization | H. J. Boehm, M. Spertus |
| N1958; N1968 | Lambda expressions and closures for C++ | V Samko; J Willcock, J Järvi, D Gregor, A Lumsdaine |
| N1959 | Member Initializers | M Spertus |
| N2049 N2196 N2243 | Proposal for new for-loop | Thorsten Ottosen, Doug Gregor |
| N2098 | Scoped Concept maps | Jeremy Siek |
| N2173 | Core Extensions for Evolution | Alisdair Meredith |
| N2224; N2236 | General Attributes for C++ | Alisdair Meredith; Michael Wong, Jens Maurer |
| N2248 | Toward a More Perfect Union | Lois Goldthwaite |
| N2281 | Digit Separators | Lawrence Crowl |
| Heading for a separate TR | ||
| These topics are deemed too important to wait for another standard after C++09 before being published, but too experimental to be finalised in time for the next Standard. Therefore, these features will be delivered by a technical report at the earliest opportunity. | ||
| N1567 N1776 N1839 N1965 N1977 | Decimal Types for C++ | Robert Klarer, P.J. Plauger |
| N1736 N1778 N1964 N2006 N2015 N2073 N2074 | Modules in C++ | Daveed Vandevoorde |
| Evolution of current proposals | ||
| These papers are the inspiration or history behind the active or accepted proposals. They are retained here as they capture a large part of the rationale that will produce C++09. | ||
| N1445 N1582 N1702 N1717 | Explicit class and default definitions | F. Glassborow, L. Goldthwaite |
| N1602 | Class Scope Using Declarations & private Members | Francis Glassborow |
| N2123 | Adding the prohibited access specifier to C++09 | Alisdair Meredith |
| N1467 N1824 | Extending Aggregate Initialization | Alisdair Meredith, Daniel F. Gutson |
| N1493 | Braces Initialization Overloading | Daniel F. Gutson |
| N1584 N1701 | Regularizing Initialization Syntax | Francis Glassborow |
| N1494 | An Explicit Override Syntax for C++ | Daniel F. Gutson |
| N1510 N1522 N1536 N1782 N1886 | Concepts - syntax and composition | B. Stroustrup, G. Dos Reis |
| N1758 N1798 N1848 N1849 | Concepts for C++0x | J. Siek, D. Gregor et al. |
| N2161 | Combining concepts | Doug Gregor, Andrew Lumsdaine |
| N1534 N1642 | Proposed addition of __func__ predefined identifier from C99 | Alex Rosenberg |
| N1583 | Inheriting Constructors | F. Glassborow |
| N1796 N1868 N1961 | Proposal for new for-loop | Thorsten Ottosen |
| N1875 | C++ Threads | Lawrence Crowl |
| N2061 N2106 N2229; N2107 | Propagating exceptions when joining threads | Beman Dawes; Alisdair Meredith, Jens Maurer |
| N2105 | Choosing Keywords | Beman Dawes |
| Background papers for reference | ||
| The papers do not contain actual proposals, but rather motivation, rationale and background to support other papers. | ||
| N1395 | Aspects of Forwarding (was C++ Support For Delegation) | Lois Goldthwaite |
| N1648 | Motivation, Objectives and Design Decisions | Attila Fehér |
| N1680 N1738 N1777 N1876 N1911 N1942 N2010 | Memory model for multithreaded C++: Issues | A. Alexandrescu, H. Boehm, K. Henney, B. Hutchings, D. Lea, B. Pugh |
| N1815 | ISO C++ Strategic Plan for Multithreading | Lawrence Crowl |
| N1834 | A Pleading for Reasonable Parallel Processing Support in C++ | Detlef Vollmann |
| N2012 | Thread Subcommittee minutes from Berlin | Lawrence Crowl |
| N2075 N2197 | Prism: A Principle-Based Sequential Memory Model for Microsoft Native Code Platforms | H Sutter |
| N2138 | A Less Formal Explanation of the Proposed C++ Concurrency Memory Model | Hans-J. Boehm |
| N2176 | Memory Model Rationales | Hans-J. Boehm |
| N1799 | C++ Language Support for Generic Programming | J. Siek, D. Gregor, R. Garcia, J. Willcock, J. Järvi, A. Lumsdaine |
| N1885 | A formalism for C++ | G. Dos Reis, B. Stroustrup |
| N1899 | Concept proposal comparison | Matt Austern |
| N2221 | An analysis of concept intersection | Bjarne Stroustrup, Gabriel Dos Reis |
| N1956 | Design Rationale for C++/CLI | H Sutter |
| N1976 | Shared dynamic objects : review and issues | Benjamin Kosnik |
| N2027 | A Brief Introduction to Rvalue References | Howard Hinnant, Bjarne Stroustrup, Brokek Kozicki |
| N2087 | A brief introduction to variadic templates | Doug Gregor |
| N2167 | Linux Kernel Reference Counting | Paul E. McKenney |
| N2216 | Report on language support for Multi-Methods and Open-Methods for C++ | P. Pirkelbauer, Y. Solodkyy, B. Stroustrup |
| Not ready for C++09, but open to resubmit in future | ||
| Papers in this category have been reviewed in EWG but for various reasons they have not been accepted for C++09. This may have been a lack of time to finalise the issues, a lack of motivation compared to competing papers, or simply the authors being pulled in different directions. This list is retained as a potential working list for EWG to pick up for the next standard revision. | ||
| N1384; N1600; N1615 | PME: Properties, methods and events | John Wiegley; Daveed Vandevoorde; Lois Goldthwaite |
| N1400 N1418 N1428 N1496 | Draft Proposal for Dynamic Libraries in C++ | Pete Becker, Matt Austern |
| N2117 | Minimal Dynamic Library Support | Lawrence Crowl |
| N1408 N1691 | Explicit Namespaces | David Abrahams |
| N1792 N1893 N1912 N2103 | A Modest Proposal: Fixing ADL | Herb Sutter, Daveed Vandevoorde |
| N1440 | Proposed Addition to C++: Class Namespaces | Carl Daniel |
| N1461 | Security and Standard C Libraries | Martyn Lovell |
| N1462 | Safe Exceptions and Compiler Security Checks | Brandon Bray |
| N1463 N1529 | Draft proposal for adding Multimethods to C++ | Julian Smith |
| N1466 | Expliciting default parameters | Daniel Gutson |
| N1470; N1741 | Extending / checking Switch statements | Daniel Gutson; Francis Glassborow |
| N1471 | Reflective Metaprogramming in C++ | Daveed Vandevoorde |
| N1524 | Nested Namespace Definition Proposal | Jon Jagger |
| N1526 | Proposal to add namespace references to C++ | Benjamin Kosnik |
| N1585 N1716 N1742 | Uniform Calling Syntax (Re-opening public interfaces) | Francis Glassborow |
| N1611 | Implicitly-Callable Functions in C++0x | Walter E. Brown |
| N1613 N1669 N1773 N1800 N1866 N1867 N1962 | Contract Programming For C++0x | L. Crowl, T. Ottosen, D. Abrahams, J. Widman |
| N1614 N1625 N1726 N1740 | Macro scopes | Thomas Plum, Bjarne Stroustrup |
| N1664; N1703 | Toward Improved Optimization Opportunities in C++0x | W. Brown,M. Paterno; Francis Glassborow |
| N1695 | A Proposal to Make Pointers to Members Callable | Peter Dimov |
| N1696 | Language Support for Restricted Templates | Peter Dimov |
| N1706 N1891 N2141 | Toward Opaque typedefs in C++0X | Walter E. Brown; Alisdair Meredith |
| N1751; N1775 | Reflection in C++ | Detlef Vollmann; Walter E. Brown, et al. |
| N1785 | Toward a Proposal for Object Templates in C++0x | Walter E. Brown |
| N1825 | Addressing Exception Specifications for Next Generation of C++ | Alisdair Meredith |
| No interest, or superseded by other proposals | ||
| These papers have either been superseded by different set of proposals, or were identified as a something we do not want to do. While everyone is free to submit papers they feel strongly about, it is unlikely any of these topics will gain favour for a future standard unless something significantly new is presented with the updated paper. | ||
| N1394 | Some proposed extensions to C++ language | David Miller |
| N1464 | Anonymous array members | Daniel Gutson |
| N1465 | Constant inheritance | Daniel Gutson |
| N1468 | Self methods | Daniel Gutson |
| N1469 | Inline Constants | Daniel Gutson |
| N1492 | Exclusive Inheritance | Daniel Gutson |
| N1605 | Extending Template Type Parameters I: Namespace and scope | Daniel Gutson |
| N1612 | How we might remove the remaining shortcomings of std::complex<T> | Thorsten Ottosen |
| N1694 | A Proposal to Extend the Function Call Operator | Peter Dimov |
| N1869 | Wording for imaginary numbers | Thorsten Ottosen |