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Add is_blank() string functor classification #112

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Add is_blank() string functor classification #112

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1d9706f
Add is_blank classifier
glywk Jan 20, 2023
3401f03
fix range-base gather algorithm
jiayuehua May 8, 2023
61fa3e4
Merge branch 'boostorg:develop' into develop
glywk Jul 26, 2023
dc14b69
Add negative is_blank predicate tests
glywk Jul 27, 2023
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19 changes: 19 additions & 0 deletions include/boost/algorithm/string/classification.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,22 @@ namespace boost {
return detail::is_classifiedF(std::ctype_base::alpha, Loc);
}

#ifndef BOOST_NO_CXX11
//! is_blank predicate
/*!
Construct the \c is_classified predicate for the \c ctype_base::blank category.

\param Loc A locale used for classification
\return An instance of the \c is_classified predicate
\since c++11
*/
inline detail::is_classifiedF
is_blank(const std::locale& Loc=std::locale())
{
return detail::is_classifiedF(std::ctype_base::blank, Loc);
}
#endif

//! is_cntrl predicate
/*!
Construct the \c is_classified predicate for the \c ctype_base::cntrl category.
Expand Down Expand Up @@ -294,6 +310,9 @@ namespace boost {
// pull names to the boost namespace
using algorithm::is_classified;
using algorithm::is_space;
#ifndef BOOST_NO_CXX11
using algorithm::is_blank;
#endif
using algorithm::is_alnum;
using algorithm::is_alpha;
using algorithm::is_cntrl;
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7 changes: 7 additions & 0 deletions string/doc/quickref.xml
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Expand Up @@ -667,6 +667,13 @@
<functionname>is_space()</functionname>
</entry>
</row>
<row>
<entry>is_blank</entry>
<entry>Recognize blanks</entry>
<entry>
<functionname>is_blank()</functionname>
</entry>
</row>
<row>
<entry>is_alnum</entry>
<entry>Recognize alphanumeric characters</entry>
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7 changes: 6 additions & 1 deletion string/test/predicate_test.cpp
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Expand Up @@ -138,7 +138,12 @@ void classification_test()
TEST_CLASS( is_any_of( string("abc") ), "aaabbcc", "aaxb" );
TEST_CLASS( is_any_of( "abc" ), "aaabbcc", "aaxb" );
TEST_CLASS( is_from_range( 'a', 'c' ), "aaabbcc", "aaxb" );


#ifndef BOOST_NO_CXX11
TEST_CLASS( is_blank(), " \t", "\t \n\r" );
TEST_CLASS( !is_blank(), "abc\n\v\f\r", "a x\t" );
#endif

TEST_CLASS( !is_classified(std::ctype_base::space), "...", "..\n\r\t " );
TEST_CLASS( ( !is_any_of("abc") && is_from_range('a','e') ) || is_space(), "d e", "abcde" );

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