C++ (Cpp) optional::begin示例

static
bool
my_cypher(std::string const& value_in, boost::optional<std::string>& value_out)
{
    size_t const cypher = 'A' - '1';

    value_out = value_in;

    for (std::string::iterator it = value_out->begin(); it != value_out->end(); ++it)
        (*it < 'A') ? (*it += cypher) : (*it -= cypher);

    return true;
}

示例#2

显示文件

文件： mss_to_mapnik.hpp 项目： koordinates/carto-parser

        symbolizer *find_symbolizer()
        {
            for(mapnik::rule::symbolizers::iterator it = rule_->begin();
                it != rule_->end();
                ++it) {
                if (symbolizer *sym = boost::get<symbolizer>(&(*it)))
                    return(sym);
            }

            BOOST_ASSERT(it==end);
            rule_->append(init_symbolizer<symbolizer>());

            symbolizer *sym = boost::get<symbolizer>(& (*(--rule_->end())) );
            return sym;
        }