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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "parse_cst_to_ast_visitor.h"
#include "errors.h"
#include <sstream>
namespace foundry {
namespace parse {
cst_to_ast_visitor::cst_to_ast_visitor()
{
return;
}
cst_to_ast_visitor::~cst_to_ast_visitor() throw()
{
return;
}
void cst_to_ast_visitor::visit(cst::start const &s)
{
if(!rt)
rt = new root;
descend(s._1);
descend(s._2);
}
void cst_to_ast_visitor::visit(cst::directives_chain const &d)
{
std::string::size_type const space = d._1.find(' ');
if(space != d._1.npos)
{
std::string const cmd(d._1, 1, space-1);
std::string const arg(d._1, space +1);
if(cmd == "namespace")
rt->ns = arg;
else
throw unhandled_directive(d._1);
}
else
throw unhandled_directive(d._1);
descend(d._2);
}
void cst_to_ast_visitor::visit(cst::end_of_directives const &)
{
return;
}
void cst_to_ast_visitor::visit(cst::rules_chain const &r)
{
descend(r._1);
descend(r._2);
}
void cst_to_ast_visitor::visit(cst::end_of_rules const &)
{
return;
}
void cst_to_ast_visitor::visit(cst::rule const &r)
{
current_rule = new rule;
current_rule->name = r._1;
descend(r._2);
if(current_rule->alternatives.size() != 1)
{
unsigned int n = 1;
for(auto i : current_rule->alternatives)
{
if(i->name == r._1)
{
std::ostringstream os;
os << i->name << "_" << n;
i->name = os.str();
}
++n;
}
}
rt->rules.push_back(current_rule);
current_rule = 0;
}
void cst_to_ast_visitor::visit(cst::alternatives const &a)
{
current_alternative = new alternative;
current_alternative->group = new group;
current_group = current_alternative->group;
current_group->rep = repeat_none;
descend(a._1);
descend(a._2);
}
void cst_to_ast_visitor::visit(cst::more_alternatives const &t)
{
current_rule->alternatives.push_back(current_alternative);
current_alternative = new alternative;
current_alternative->group = new group;
current_group = current_alternative->group;
current_group->rep = repeat_none;
descend(t._1);
}
void cst_to_ast_visitor::visit(cst::end_of_alternatives const &)
{
current_rule->alternatives.push_back(current_alternative);
}
void cst_to_ast_visitor::visit(cst::unnamed_alternative const &a)
{
current_alternative->name = current_rule->name;
descend(a._1);
}
void cst_to_ast_visitor::visit(cst::named_alternative const &a)
{
current_alternative->name = a._1;
descend(a._2);
}
void cst_to_ast_visitor::visit(cst::components const &c)
{
descend(c._1);
}
void cst_to_ast_visitor::visit(cst::components_chain const &c)
{
descend(c._1);
descend(c._2);
}
void cst_to_ast_visitor::visit(cst::end_of_components const &)
{
return;
}
void cst_to_ast_visitor::visit(cst::components_elem const &c)
{
// Resolve repetition first
descend(c._2);
if(current_repeat != repeat_none)
{
group_ptr ng = new group;
ng->rep = current_repeat;
current_repeat = repeat_none;
current_group->components.push_back(ng);
group_ptr stack = current_group;
current_group = ng;
descend(c._1);
current_group = stack;
}
else
{
descend(c._1);
}
}
void cst_to_ast_visitor::visit(cst::no_repetition const &)
{
current_repeat = repeat_none;
}
void cst_to_ast_visitor::visit(cst::zero_or_one const &)
{
current_repeat = repeat_zero_or_one;
}
void cst_to_ast_visitor::visit(cst::one_or_more const &)
{
current_repeat = repeat_one_or_more;
}
void cst_to_ast_visitor::visit(cst::zero_or_more const &)
{
current_repeat = repeat_zero_or_more;
}
void cst_to_ast_visitor::visit(cst::symbol const &c)
{
unresolved_symbol_ptr u = new unresolved_symbol;
u->name = c._1;
current_group->components.push_back(u);
}
void cst_to_ast_visitor::visit(cst::literal const &c)
{
string_literal_ptr sl = new string_literal;
sl->text = c._1;
current_group->components.push_back(sl);
}
void cst_to_ast_visitor::visit(cst::regex const &c)
{
regex_ptr rx = new regex;
rx->text = c._1;
current_group->components.push_back(rx);
}
void cst_to_ast_visitor::visit(cst::group const &g)
{
group_ptr ng = new group;
ng->rep = current_repeat;
current_group->components.push_back(ng);
group_ptr stack = current_group;
current_group = ng;
descend(g._1);
current_group = stack;
}
}
}
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