eval_helpers.cpp

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#include <boost/spirit/include/qi.hpp>
#include <boost/algorithm/string.hpp>

#include "server/eval/eval_helpers.hpp"
#include "server/parser/color_grammar.hpp"

namespace eval {





template<>
bool Conv(const string& str, bool* out, bool tryToCache )
{
    assert(out);
    *out = true;

    if(str == "")
        *out = false;
    if(str == "false")
        *out = false;
    if(str == "no")
        *out = false;

    int i;
    if(Conv(str, &i) && i == 0)
    {
        *out = false;
    }

    return true;
}


ColorGrammar color_;

template<>
bool Conv(const string& str, Color* out, bool tryToCache )
{
    assert(out);
    StringIterator begin = str.cbegin();
    StringIterator end = str.cend();

    bool result = qi::phrase_parse(begin, end, color_, chs::space, *out);

    return begin == end && result;
}


template<>
bool Conv(const string& str, string* out, bool tryToCache )
{
    assert(out);
    out->clear();

    bool quote = false;
    for(char c : str)
    {
        if(c == '\"')
        {
            quote = !quote;
        }else{
            out->push_back(c);
        }
    }
    boost::algorithm::trim(*out);
    return !quote;
}


template<>
bool Conv(const string& str, MaybeCachedString* out, bool tryToCache )
{
    string extr;

    bool result = Conv<string>(str, &extr);

    if(result)
    {
        if(tryToCache)
        {
            *out = CachedString(extr);
        }else{
            *out = extr;
        }
    }

    return result;
}

    
template<>
string ToString(const bool& v)
{
    return v ? "true" : "false";
}



}