static name parse_quoted_symbol_or_token(parser & p, buffer<token_entry> & new_tokens, bool & used_default, notation_entry_group grp) {
used_default = false;
if (p.curr_is_quoted_symbol()) {
environment const & env = p.env();
auto pp_tk = p.get_name_val();
auto tks = utf8_trim(pp_tk.to_string());
auto tkcs = tks.c_str();
check_not_forbidden(tkcs);
p.next();
if (p.curr_is_token(get_colon_tk())) {
p.next();
unsigned prec = parse_precedence(p);
new_tokens.push_back(mk_token_entry(tkcs, prec, grp));
} else if (!get_precedence(env, tkcs, grp)) {
new_tokens.push_back(mk_token_entry(tkcs, LEAN_DEFAULT_PRECEDENCE, grp));
used_default = true;
}
return pp_tk;
} else if (p.curr_is_keyword()) {
auto tk = p.get_token_info().token();
check_not_forbidden(tk.to_string().c_str());
p.next();
return tk;
} else {
throw parser_error("invalid notation declaration, symbol expected", p.pos());
}
}
static name parse_class(parser & p) {
if (p.curr_is_token(g_lbracket)) {
p.next();
name n;
if (p.curr_is_identifier())
n = p.get_name_val();
else if (p.curr_is_keyword() || p.curr_is_command())
n = p.get_token_info().value();
else
throw parser_error("invalid 'using' command, identifier or symbol expected", p.pos());
p.next();
p.check_token_next(g_rbracket, "invalid 'using' command, ']' expected");
return n;
} else {
return name();
}
}