Mercurial > hg > CbC > CbC_gcc
annotate gcc/doc/implement-cxx.texi @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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145 | 1 @c Copyright (C) 2009-2020 Free Software Foundation, Inc. |
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2 @c This is part of the GCC manual. |
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3 @c For copying conditions, see the file gcc.texi. |
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5 @node C++ Implementation |
111 | 6 @chapter C++ Implementation-Defined Behavior |
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7 @cindex implementation-defined behavior, C++ language |
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8 |
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9 A conforming implementation of ISO C++ is required to document its |
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10 choice of behavior in each of the areas that are designated |
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11 ``implementation defined''. The following lists all such areas, |
111 | 12 along with the section numbers from the ISO/IEC 14882:1998 and ISO/IEC |
13 14882:2003 standards. Some areas are only implementation-defined in | |
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14 one version of the standard. |
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16 Some choices depend on the externally determined ABI for the platform |
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17 (including standard character encodings) which GCC follows; these are |
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18 listed as ``determined by ABI'' below. @xref{Compatibility, , Binary |
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19 Compatibility}, and @uref{http://gcc.gnu.org/readings.html}. Some |
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20 choices are documented in the preprocessor manual. |
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21 @xref{Implementation-defined behavior, , Implementation-defined |
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22 behavior, cpp, The C Preprocessor}. Some choices are documented in |
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23 the corresponding document for the C language. @xref{C |
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24 Implementation}. Some choices are made by the library and operating |
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25 system (or other environment when compiling for a freestanding |
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26 environment); refer to their documentation for details. |
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27 |
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28 @menu |
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29 * Conditionally-supported behavior:: |
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30 * Exception handling:: |
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31 @end menu |
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32 |
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33 @node Conditionally-supported behavior |
111 | 34 @section Conditionally-Supported Behavior |
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35 |
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36 @cite{Each implementation shall include documentation that identifies |
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37 all conditionally-supported constructs that it does not support (C++0x |
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38 1.4).} |
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39 |
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40 @itemize @bullet |
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41 @item |
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42 @cite{Whether an argument of class type with a non-trivial copy |
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43 constructor or destructor can be passed to ... (C++0x 5.2.2).} |
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44 |
111 | 45 Such argument passing is supported, using the same |
46 pass-by-invisible-reference approach used for normal function | |
47 arguments of such types. | |
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48 |
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49 @end itemize |
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51 @node Exception handling |
111 | 52 @section Exception Handling |
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53 |
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54 @itemize @bullet |
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55 @item |
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56 @cite{In the situation where no matching handler is found, it is |
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57 implementation-defined whether or not the stack is unwound before |
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58 std::terminate() is called (C++98 15.5.1).} |
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59 |
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60 The stack is not unwound before std::terminate is called. |
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61 |
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62 @end itemize |