misc1.cpp
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///////////////////////////////////////////////////////////////////////////////
// misc1.hpp
//
// Copyright 2008 Eric Niebler. 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 <iostream>
#include <boost/xpressive/xpressive.hpp>
#include <boost/xpressive/traits/cpp_regex_traits.hpp>
#include <boost/test/unit_test.hpp>
using namespace boost::unit_test;
using namespace boost::xpressive;
void test1()
{
// make sure the following compiles:
sregex a = _;
sregex b = _;
sregex c = a >> b;
c = 'a' >> b;
c = a >> 'b';
c = a | b;
c = 'a' | b;
c = a | 'b';
c = !a;
c = *a;
c = +a;
}
///////////////////////////////////////////////////////////////////////////////
// test for basic_regex in a keep
//
void test2()
{
std::locale loc;
std::string str("Its a mad Mad mAd maD world");
sregex word = +_w;
sregex sentence = imbue(loc)(*(keep(word) >> +_s) >> word);
smatch what;
BOOST_REQUIRE(regex_match(str, what, sentence));
BOOST_REQUIRE(7 == what.nested_results().size());
smatch::nested_results_type::const_iterator pword = what.nested_results().begin();
BOOST_CHECK((*pword++)[0] == "Its");
BOOST_CHECK((*pword++)[0] == "a");
BOOST_CHECK((*pword++)[0] == "mad");
BOOST_CHECK((*pword++)[0] == "Mad");
BOOST_CHECK((*pword++)[0] == "mAd");
BOOST_CHECK((*pword++)[0] == "maD");
BOOST_CHECK((*pword++)[0] == "world");
BOOST_CHECK(pword == what.nested_results().end());
}
///////////////////////////////////////////////////////////////////////////////
// test for a simple non-recursive grammar
//
void test3()
{
// test for a simple regex grammar
std::string buffer =
"FROGGIE\r\n"
"Volume = 1\r\n"
"Other1= 2\r\n"
"Channel=3\r\n"
"Other =4\r\n"
"\r\n"
"FROGGIE\r\n"
"Volume = 5\r\n"
"Other1= 6\r\n"
"Channel=7\r\n"
"Other =8\r\n"
"\r\n"
"FROGGIE\r\n"
"Volume = 9\r\n"
"Other1= 0\r\n"
"Channel=10\r\n"
"\r\n";
mark_tag name(1), value(2);
sregex name_value_pair_ =
(name= +alnum) >> *_s >> "=" >> *_s >>
(value= +_d) >> *_s >> _ln;
sregex message_ =
*_s >> "FROGGIE" >> _ln >> +name_value_pair_ >> _ln;
sregex re_ = +message_;
smatch::nested_results_type::const_iterator msg, nvp;
smatch tmpwhat;
BOOST_REQUIRE(regex_search(buffer, tmpwhat, re_));
// for giggles, make a deep-copy of the tree of results
smatch what = tmpwhat;
BOOST_REQUIRE(3 == what.nested_results().size());
msg = what.nested_results().begin();
BOOST_REQUIRE(4 == msg->nested_results().size());
nvp = msg->nested_results().begin();
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Volume" == (*nvp)[name]);
BOOST_CHECK("1" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Other1" == (*nvp)[name]);
BOOST_CHECK("2" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Channel" == (*nvp)[name]);
BOOST_CHECK("3" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Other" == (*nvp)[name]);
BOOST_CHECK("4" == (*nvp)[value]);
++msg;
BOOST_REQUIRE(4 == msg->nested_results().size());
nvp = msg->nested_results().begin();
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Volume" == (*nvp)[name]);
BOOST_CHECK("5" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Other1" == (*nvp)[name]);
BOOST_CHECK("6" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Channel" == (*nvp)[name]);
BOOST_CHECK("7" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Other" == (*nvp)[name]);
BOOST_CHECK("8" == (*nvp)[value]);
++msg;
BOOST_REQUIRE(3 == msg->nested_results().size());
nvp = msg->nested_results().begin();
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Volume" == (*nvp)[name]);
BOOST_CHECK("9" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Other1" == (*nvp)[name]);
BOOST_CHECK("0" == (*nvp)[value]);
++nvp;
BOOST_REQUIRE(3 == nvp->size());
BOOST_CHECK("Channel" == (*nvp)[name]);
BOOST_CHECK("10" == (*nvp)[value]);
}
///////////////////////////////////////////////////////////////////////////////
// test for a self-recursive regex
//
void test4()
{
sregex parentheses;
parentheses // A balanced set of parentheses ...
= '(' // is an opening parenthesis ...
>> // followed by ...
*( // zero or more ...
keep( +~(set='(',')') ) // of a bunch of things that are not parentheses ...
| // or ...
by_ref(parentheses) // a balanced set of parentheses
) // (ooh, recursion!) ...
>> // followed by ...
')' // a closing parenthesis
;
smatch what;
smatch::nested_results_type::const_iterator pwhat, pwhat2;
std::string str( "blah blah( a(b)c (c(e)f (g)h )i (j)6 )blah" );
BOOST_REQUIRE(regex_search(str, what, parentheses));
BOOST_REQUIRE(1 == what.size());
BOOST_CHECK("( a(b)c (c(e)f (g)h )i (j)6 )" == what[0]);
BOOST_REQUIRE(3 == what.nested_results().size());
pwhat = what.nested_results().begin();
BOOST_REQUIRE(1 == pwhat->size());
BOOST_CHECK("(b)" == (*pwhat)[0]);
++pwhat;
BOOST_REQUIRE(1 == pwhat->size());
BOOST_CHECK("(c(e)f (g)h )" == (*pwhat)[0]);
BOOST_REQUIRE(2 == pwhat->nested_results().size());
pwhat2 = pwhat->nested_results().begin();
BOOST_REQUIRE(1 == pwhat2->size());
BOOST_CHECK("(e)" == (*pwhat2)[0]);
++pwhat2;
BOOST_REQUIRE(1 == pwhat2->size());
BOOST_CHECK("(g)" == (*pwhat2)[0]);
++pwhat;
BOOST_REQUIRE(1 == pwhat->size());
BOOST_CHECK("(j)" == (*pwhat)[0]);
}
///////////////////////////////////////////////////////////////////////////////
// test for a sub-match scoping
//
void test5()
{
sregex inner = sregex::compile( "(.)\\1" );
sregex outer = (s1= _) >> inner >> s1;
std::string abba("ABBA");
BOOST_CHECK(regex_match(abba, outer));
}
///////////////////////////////////////////////////////////////////////////////
// Ye olde calculator. Test recursive grammar.
//
void test6()
{
sregex group, factor, term, expression;
group = '(' >> by_ref(expression) >> ')';
factor = +_d | group;
term = factor >> *(('*' >> factor) | ('/' >> factor));
expression = term >> *(('+' >> term) | ('-' >> term));
smatch what;
std::string str("foo 9*(10+3) bar");
BOOST_REQUIRE(regex_search(str, what, expression));
BOOST_CHECK("9*(10+3)" == what[0]);
}
///////////////////////////////////////////////////////////////////////////////
// init_unit_test_suite
//
test_suite* init_unit_test_suite( int argc, char* argv[] )
{
test_suite *test = BOOST_TEST_SUITE("miscelaneous tests and examples from the docs");
test->add(BOOST_TEST_CASE(&test1));
test->add(BOOST_TEST_CASE(&test2));
test->add(BOOST_TEST_CASE(&test3));
test->add(BOOST_TEST_CASE(&test4));
test->add(BOOST_TEST_CASE(&test5));
test->add(BOOST_TEST_CASE(&test6));
return test;
}