[DEV] add v1.66.0

libs/metaparse/example/parsing_error/Jamfile.v2

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+exe parsing_error :  main.cpp ;

libs/metaparse/example/parsing_error/README

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+This example shows how a compile-time parsing error can be debugged.
+The commented code fails to compile and on some platforms the error report might
+be difficult to understand. This example demonstrates how debug_parsing_error
+can be used to get a user friendly error report about such thing. You need to
+run the compiled code to get the error message:
+
+Compile-time parsing results
+----------------------------
+Input text:
+aaac
+
+Parsing failed:
+line 1, col 4: Expected: b
+
+The col and line information refers to the location of the error in the string
+literal.
+

libs/metaparse/example/parsing_error/main.cpp

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+// Copyright Abel Sinkovics (abel@sinkovics.hu)  2011.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/metaparse/repeated.hpp>
+#include <boost/metaparse/sequence.hpp>
+#include <boost/metaparse/lit_c.hpp>
+#include <boost/metaparse/debug_parsing_error.hpp>
+
+#include <boost/metaparse/build_parser.hpp>
+#include <boost/metaparse/string.hpp>
+
+#include <boost/mpl/apply.hpp>
+
+using boost::metaparse::sequence;
+using boost::metaparse::lit_c;
+using boost::metaparse::repeated;
+using boost::metaparse::build_parser;
+using boost::metaparse::debug_parsing_error;
+
+using boost::mpl::apply;
+
+/*
+ * The grammar
+ *
+ * s ::= a*b
+ */
+typedef sequence<repeated<lit_c<'a'> >, lit_c<'b'> > s;
+
+typedef build_parser<s> test_parser;
+
+#if BOOST_METAPARSE_STD < 2011
+
+typedef boost::metaparse::string<'a','a','a','c'> invalid_input;
+
+#else
+
+typedef BOOST_METAPARSE_STRING("aaac") invalid_input;
+
+#endif
+
+debug_parsing_error<test_parser, invalid_input> debug;
+
+int main()
+{
+  // This causes an error
+  // apply<test_parser, invalid_input>::type();
+}
+
+