本文整理汇总了C++中cstring::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ cstring::clear方法的具体用法？C++ cstring::clear怎么用？C++ cstring::clear使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类cstring的用法示例。
在下文中一共展示了cstring::clear方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: next_line
bool
config_file_iterator::Impl::get_next_line( cstring& line )
{
bool broken_line = false;
line.clear();
while( !m_curr_level->m_stream.eof() || !!m_curr_level->m_parent.get() ) {
// 10. Switch to upper include level if current one is finished
// 20. Read/append next file line
// 30. Increment line number
// 40. Remove comments
// 50. Remove trailing and leading spaces
// 60. Skip empty string
// 70. Concatenate broken lines if needed. Put the result into line
// 80. If line is not completed, try to finish it by reading the next line
// 90. Process command line
// 100. Substitute macros references with their definitions
// 110. Next line found.
if( m_curr_level->m_stream.eof() ) { // 10 //
m_curr_level = m_curr_level->m_parent;
continue;
}
std::ifstream& input = m_curr_level->m_stream;
char_type* buffer_insert_pos = broken_line ? m_buffer.get() + line.size() : m_buffer.get();
input.getline( buffer_insert_pos, (std::streamsize)(m_buffer_size - line.size()), // 20 //
m_line_delimeter );
cstring next_line( buffer_insert_pos,
input.gcount() > 0
? buffer_insert_pos + (input.eof() ? input.gcount() : (input.gcount()-1))
: buffer_insert_pos );
m_curr_level->m_curr_location.second++; // 30 //
cstring::size_type comment_pos = next_line.find( m_sl_comment_delimeter );
if( comment_pos != cstring::npos )
next_line.trim_right( next_line.begin()+comment_pos ); // 40 //
if( m_trim_trailing_spaces ) // 50 //
next_line.trim_right();
if( m_trim_leading_spaces && !broken_line )
next_line.trim_left();
if( next_line.is_empty() ) { // 60 //
if( m_skip_empty_lines )
continue;
else
next_line.assign( buffer_insert_pos, buffer_insert_pos );
}
line = broken_line ? cstring( line.begin(), next_line.end() ) : next_line; // 70 //
broken_line = match_back( line, m_line_beak );
if( broken_line ) { // 80 //
line.trim_right( 1 );
continue;
}
if( match_front( line, m_command_delimeter ) ) { // 90 //
process_command_line( line );
continue;
}
if( !is_active_line() )
continue;
substitute_macros( line ); // 100 //
return true; // 110 //
}
BOOST_RT_PARAM_VALIDATE_LOGIC( !broken_line, BOOST_RT_PARAM_LITERAL( "broken line is not completed" ) );
BOOST_RT_PARAM_VALIDATE_LOGIC( m_conditional_states.size() == 0,
BOOST_RT_PARAM_LITERAL( "matching endif command is missing" ) );
return false;
}