environment print_cmd(parser & p) {
if (p.curr() == scanner::token_kind::String) {
p.regular_stream() << p.get_str_val() << endl;
p.next();
} else if (p.curr_is_token_or_id(g_raw)) {
p.next();
expr e = p.parse_expr();
p.regular_stream() << e << endl;
} else if (p.curr_is_token_or_id(g_options)) {
p.next();
p.regular_stream() << p.ios().get_options() << endl;
} else {
throw parser_error("invalid print command", p.pos());
}
return p.env();
}
environment set_option_cmd(parser & p) {
auto id_pos = p.pos();
name id = p.check_id_next("invalid set option, identifier (i.e., option name) expected");
auto decl_it = get_option_declarations().find(id);
if (decl_it == get_option_declarations().end()) {
// add "lean" prefix
name lean_id = name("lean") + id;
decl_it = get_option_declarations().find(lean_id);
if (decl_it == get_option_declarations().end()) {
throw parser_error(sstream() << "unknown option '" << id << "', type 'help options.' for list of available options", id_pos);
} else {
id = lean_id;
}
}
option_kind k = decl_it->second.kind();
if (k == BoolOption) {
if (p.curr_is_token_or_id(g_true))
p.set_option(id, true);
else if (p.curr_is_token_or_id(g_false))
p.set_option(id, false);
else
throw parser_error("invalid Boolean option value, 'true' or 'false' expected", p.pos());
p.next();
} else if (k == StringOption) {
if (!p.curr_is_string())
throw parser_error("invalid option value, given option is not a string", p.pos());
p.set_option(id, p.get_str_val());
p.next();
} else if (k == DoubleOption) {
p.set_option(id, p.parse_double());
} else if (k == UnsignedOption || k == IntOption) {
p.set_option(id, p.parse_small_nat());
} else {
throw parser_error("invalid option value, 'true', 'false', string, integer or decimal value expected", p.pos());
}
p.updt_options();
return p.env();
}