void tag_execute::execute(context &ctx, std::ostream &out, const tag *caller) const {
const tag *c = ctx.pop();
if (c) {
const string &name = get_parameter(ctx, "name");
if (!name.empty()) {
tag_tag *t = static_cast<tag_tag*>(c->get_child(string("@") + name));
if (!t)
throw tag_exception(
(format(_("custom tag '{0}' is not defined at this scope")) % name).str());
t->execute(ctx, out, c);
ctx.push(c);
} else {
static_cast<const tag_usr*>(c)->execute_direct(ctx, out, this);
}
}
}
void tag_usr::execute(context &ctx, std::ostream &out, const tag *caller) const {
// create new context layer
ctx.enter();
try {
for (parameters::const_iterator i = params.begin();
i != params.end(); ++i) {
// create and initialize the variable from parameter
ostringstream s;
(i->second)->execute(ctx, s, this);
ctx.add_value(i->first, s.str());
}
tag* t = user_tag;
if (!t) {
tag *p = parent;
while (p && !(t = p->get_child("@" + name))) {
p = p->get_parent();
}
if (!t)
throw tag_exception(
(format(_("custom tag '{0}' is not defined at this scope")) % name).str());
}
// execute custom tag
ctx.push(this);
try {
static_cast<tag_tag*>(t)->execute(ctx, out, this);
} catch (...) {
ctx.pop();
throw;
}
ctx.pop();
}
catch (...) {
// free context layer created
ctx.leave();
throw;
}
// free context layer created
ctx.leave();
}
void tag_usr::execute_direct(context &ctx, std::ostream &out,
const tag *caller) const {
tag_impl::execute(ctx, out, caller);
ctx.push(this);
}