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add bunch of grammar tests from the documentation

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[SVN r32218]
This commit is contained in:
Eric Niebler 2006-01-04 02:37:26 +00:00
parent e7f531440c
commit 1468883926
1 changed files with 111 additions and 8 deletions
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119
test/misc1.cpp
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@ -12,10 +12,7 @@
using namespace boost::xpressive;
///////////////////////////////////////////////////////////////////////////////
// test_main
//
int test_main( int, char*[] )
void test1()
{
// make sure the following compiles:
sregex a = _;
@ -25,8 +22,13 @@ int test_main( int, char*[] )
c = !a;
c = *a;
c = +a;
}
// test for basic_regex in a keep
///////////////////////////////////////////////////////////////////////////////
// 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;
@ -42,7 +44,13 @@ int test_main( int, char*[] )
BOOST_CHECK(what(word, 4)[0] == "mAd");
BOOST_CHECK(what(word, 5)[0] == "maD");
BOOST_CHECK(what(word, 6)[0] == "world");
}
///////////////////////////////////////////////////////////////////////////////
// test for a simple non-recursive grammar
//
void test3()
{
// test for a simple regex grammar
std::string buffer =
"FROGGIE\r\n"
@ -74,10 +82,12 @@ int test_main( int, char*[] )
sregex re_ = +message_;
typedef smatch::nested_results_type::const_iterator nested_iterator;
nested_iterator msg, nvp;
smatch::nested_results_type::const_iterator msg, nvp;
smatch tmpwhat;
BOOST_REQUIRE(regex_search(buffer, what, re_));
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();
@ -135,6 +145,99 @@ int test_main( int, char*[] )
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]);
}
///////////////////////////////////////////////////////////////////////////////
// test_main
//
int test_main( int, char*[] )
{
test1();
test2();
test3();
test4();
test5();
test6();
return 0;
}