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Also, make sure that `make dist` generates a correct tarball even if the C++ compiler does not work. Reported by Nelson H. F. Beebe. * m4/cxx.m4 (BISON_CXX_WORKS): Define to true/false instead of true/exit 77. The latter is too dangerous to use (it directly quits). (ENABLE_CXX): New name for the Automake conditional, for consistency with ENABLE_CXX11 etc. * tests/local.at (AT_COMPILE, AT_COMPILE_CXX): Adjust to the new semantics of BISON_CXX_WORKS. * examples/c++/local.mk: Skip the variant test if C++ does not work. * examples/calc++/local.mk: Likewise.
This directory contains examples of Bison grammar files in C++. * Examples in C++ You can run `make` to compile these examples. And `make clean` to tidy afterwards. ** simple.yy - Simple example in C++14 A very simple example in C++, based on variants and symbol constructors. Variants allow to use any C++ type as semantic value type, and symbol constructors ensure consistency between declared token type and effective semantic value. Run as `./simple`. Extracted from the documentation: "A Simple C++ Example". https://www.gnu.org/software/bison/manual/html_node/A-Simple-C_002b_002b-Example.html ** variant.yy - Self-contained example in C++98 A variation of simple.yy, in C++98. Run as `./variant`. ** variant-11.yy - Self-contained example in modern C++ Another variation of simple.yy, closely related to the previous one, but exhibiting support for C++11's move semantics. Run as `./variant` or `./variant NUMBER`. ----- Local Variables: mode: outline fill-column: 76 ispell-dictionary: "american" End: Copyright (C) 2018 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the "GNU Free Documentation License" file as part of this distribution. # LocalWords: mfcalc calc parsers yy ispell american