mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
4efea0ff3c
— 🛠 Update SOL_IS_(DEFAULT_)ON/OFF usage to be more idiomatic and less confusing (add SOL_RAW_* alternatives as well) — 💚 Re-check CI — 👷♀️ Add missing header from ebco.hpp
606 lines
15 KiB
C++
606 lines
15 KiB
C++
// sol2
|
|
|
|
// The MIT License (MIT)
|
|
|
|
// Copyright (c) 2013-2021 Rapptz, ThePhD and contributors
|
|
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
// this software and associated documentation files (the "Software"), to deal in
|
|
// the Software without restriction, including without limitation the rights to
|
|
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
// the Software, and to permit persons to whom the Software is furnished to do so,
|
|
// subject to the following conditions:
|
|
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
#include "sol_test.hpp"
|
|
#include "common_classes.hpp"
|
|
|
|
#include <catch2/catch_all.hpp>
|
|
|
|
#include <iterator>
|
|
#include <vector>
|
|
#include <list>
|
|
#include <forward_list>
|
|
#include <map>
|
|
#include <deque>
|
|
#include <array>
|
|
#include <unordered_map>
|
|
#include <set>
|
|
#include <unordered_set>
|
|
|
|
inline namespace sol2_test_containers {
|
|
struct returns_callable {
|
|
std::vector<int>* ptr;
|
|
|
|
returns_callable(std::vector<int>& ref_) : ptr(&ref_) {
|
|
}
|
|
|
|
std::vector<int>& operator()() const {
|
|
REQUIRE(ptr->size() == 3);
|
|
return *ptr;
|
|
}
|
|
};
|
|
} // namespace sol2_test_containers
|
|
|
|
TEST_CASE("containers/returns", "make sure that even references to vectors are being serialized as tables") {
|
|
sol::state lua;
|
|
std::vector<int> v { 1, 2, 3 };
|
|
returns_callable f(v);
|
|
lua.set_function("f", f);
|
|
auto result1 = lua.safe_script("x = f()", sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
sol::object x = lua["x"];
|
|
sol::type xt = x.get_type();
|
|
REQUIRE(xt == sol::type::userdata);
|
|
sol::table t = x;
|
|
bool matching;
|
|
matching = t[1] == 1;
|
|
REQUIRE(matching);
|
|
matching = t[2] == 2;
|
|
REQUIRE(matching);
|
|
matching = t[3] == 3;
|
|
REQUIRE(matching);
|
|
}
|
|
|
|
TEST_CASE("containers/custom usertype", "make sure container usertype metatables can be overridden") {
|
|
typedef std::unordered_map<int, int> bark;
|
|
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
lua.new_usertype<bark>(
|
|
"bark",
|
|
"something",
|
|
[](const bark& b) { INFO("It works: " << b.at(24)); },
|
|
"size",
|
|
&bark::size,
|
|
"at",
|
|
sol::resolve<const int&>(&bark::at),
|
|
"clear",
|
|
&bark::clear);
|
|
bark obj { { 24, 50 } };
|
|
lua.set("a", &obj);
|
|
{
|
|
auto result0 = lua.safe_script("assert(a:at(24) == 50)", sol::script_pass_on_error);
|
|
REQUIRE(result0.valid());
|
|
auto result1 = lua.safe_script("a:something()", sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
}
|
|
lua.set("a", obj);
|
|
{
|
|
auto result = lua.safe_script("assert(a:at(24) == 50)", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
{
|
|
auto result = lua.safe_script("a:something()", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
}
|
|
|
|
TEST_CASE("containers/const serialization kvp", "make sure const keys / values are respected") {
|
|
typedef std::map<int, const int> bark;
|
|
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
{
|
|
bark obj { { 24, 50 } };
|
|
lua.set("a", std::ref(obj));
|
|
auto result0 = lua.safe_script("assert(a[24] == 50)", sol::script_pass_on_error);
|
|
REQUIRE(result0.valid());
|
|
auto result1 = lua.safe_script("a[24] = 51", sol::script_pass_on_error);
|
|
REQUIRE_FALSE(result1.valid());
|
|
auto result2 = lua.safe_script("assert(a[24] == 50)", sol::script_pass_on_error);
|
|
REQUIRE(result2.valid());
|
|
}
|
|
}
|
|
|
|
TEST_CASE("containers/basic serialization", "make sure containers are turned into proper userdata and have basic hooks established") {
|
|
typedef std::vector<int> woof;
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
lua.set("b", woof { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 });
|
|
{
|
|
auto result = lua.safe_script("for k = 1, #b do assert(k == b[k]) end", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
woof w { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 };
|
|
lua.set("b", w);
|
|
{
|
|
auto result = lua.safe_script("for k = 1, #b do assert(k == b[k]) end", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
lua.set("b", &w);
|
|
{
|
|
auto result = lua.safe_script("for k = 1, #b do assert(k == b[k]) end", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
lua.set("b", std::ref(w));
|
|
{
|
|
auto result = lua.safe_script("for k = 1, #b do assert(k == b[k]) end", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
}
|
|
|
|
#if 0 // LUL const int holders
|
|
TEST_CASE("containers/const serialization", "make sure containers are turned into proper userdata and the basic hooks respect const-ness") {
|
|
typedef std::vector<const int> woof;
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
lua.set("b", woof{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 });
|
|
{
|
|
auto result = lua.safe_script("for k, v in pairs(b) do assert(k == v) end", sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
}
|
|
{
|
|
auto result = lua.safe_script("b[1] = 20", sol::script_pass_on_error);
|
|
REQUIRE_FALSE(result.valid());
|
|
}
|
|
}
|
|
#endif
|
|
|
|
TEST_CASE("containers/const correctness", "usertype metatable names should reasonably ignore const attributes") {
|
|
struct Vec {
|
|
int x, y, z;
|
|
};
|
|
|
|
sol::state lua;
|
|
lua.open_libraries(sol::lib::base);
|
|
lua.new_usertype<Vec>("Vec", "x", &Vec::x, "y", &Vec::y, "z", &Vec::z);
|
|
|
|
Vec vec;
|
|
vec.x = 1;
|
|
vec.y = 2;
|
|
vec.z = -3;
|
|
|
|
std::vector<Vec> foo;
|
|
foo.push_back(vec);
|
|
|
|
std::vector<Vec const*> bar;
|
|
bar.push_back(&vec);
|
|
|
|
auto result0 = lua.safe_script(R"(
|
|
func = function(vecs)
|
|
for i = 1, #vecs do
|
|
vec = vecs[i]
|
|
print(i, ":", vec.x, vec.y, vec.z)
|
|
end
|
|
end
|
|
)",
|
|
sol::script_pass_on_error);
|
|
REQUIRE(result0.valid());
|
|
|
|
sol::protected_function f(lua["func"]);
|
|
auto pfr1 = f(foo);
|
|
REQUIRE(pfr1.valid());
|
|
auto pfr2 = f(bar);
|
|
REQUIRE(pfr2.valid());
|
|
}
|
|
|
|
TEST_CASE(
|
|
"containers/usertype transparency", "Make sure containers pass their arguments through transparently and push the results as references, not new values") {
|
|
class A {
|
|
public:
|
|
int a;
|
|
A(int b = 2) : a(b) {};
|
|
|
|
void func() {
|
|
}
|
|
};
|
|
|
|
struct B {
|
|
|
|
B() {
|
|
for (std::size_t i = 0; i < 20; ++i) {
|
|
a_list.emplace_back(static_cast<int>(i));
|
|
}
|
|
}
|
|
|
|
std::vector<A> a_list;
|
|
};
|
|
|
|
sol::state lua;
|
|
lua.new_usertype<B>("B", "a_list", &B::a_list);
|
|
|
|
auto result = lua.safe_script(R"(
|
|
b = B.new()
|
|
a_ref = b.a_list[2]
|
|
)",
|
|
sol::script_pass_on_error);
|
|
REQUIRE(result.valid());
|
|
|
|
B& b = lua["b"];
|
|
A& a_ref = lua["a_ref"];
|
|
REQUIRE(&b.a_list[1] == &a_ref);
|
|
REQUIRE(b.a_list[1].a == a_ref.a);
|
|
}
|
|
|
|
struct options {
|
|
static int livingcount;
|
|
static options* last;
|
|
options() {
|
|
++livingcount;
|
|
last = this;
|
|
INFO("constructor: " << this);
|
|
}
|
|
|
|
std::string output_help() {
|
|
last = this;
|
|
INFO("func: " << this);
|
|
return "";
|
|
}
|
|
|
|
void begin() {
|
|
}
|
|
void end() {
|
|
}
|
|
|
|
~options() {
|
|
last = this;
|
|
--livingcount;
|
|
}
|
|
};
|
|
|
|
options* options::last = nullptr;
|
|
int options::livingcount = 0;
|
|
|
|
struct machine {
|
|
options opt;
|
|
};
|
|
|
|
namespace sol {
|
|
template <>
|
|
struct is_container<options> : std::false_type { };
|
|
} // namespace sol
|
|
|
|
TEST_CASE("containers/is container", "make sure the is_container trait behaves properly") {
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
|
|
lua.new_usertype<options>("options_type", "output_help", &options::output_help);
|
|
|
|
lua.new_usertype<machine>(
|
|
"machine_type", "new", sol::no_constructor, "opt", [](machine& m) { return &m.opt; }, "copy_opt", [](machine& m) { return m.opt; });
|
|
|
|
{
|
|
machine m;
|
|
lua["machine"] = &m;
|
|
|
|
auto result0 = lua.safe_script(R"(
|
|
machine:opt():output_help()
|
|
)",
|
|
sol::script_pass_on_error);
|
|
REQUIRE(result0.valid());
|
|
|
|
REQUIRE(options::last == &m.opt);
|
|
REQUIRE(options::livingcount == 1);
|
|
}
|
|
REQUIRE(options::livingcount == 0);
|
|
}
|
|
|
|
TEST_CASE("containers/readonly", "make sure readonly members are stored appropriately") {
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
|
|
struct bar {
|
|
int x = 24;
|
|
};
|
|
|
|
struct foo {
|
|
std::list<bar> seq;
|
|
};
|
|
|
|
lua.new_usertype<foo>("foo",
|
|
"seq",
|
|
&foo::seq, // this one works
|
|
"readonly_seq",
|
|
sol::readonly(&foo::seq));
|
|
lua["value"] = std::list<bar> { {}, {}, {} };
|
|
|
|
auto result0 = lua.safe_script(R"(
|
|
a = foo.new()
|
|
x = a.seq
|
|
a.seq = value
|
|
y = a.readonly_seq
|
|
)",
|
|
sol::script_pass_on_error);
|
|
REQUIRE(result0.valid());
|
|
std::list<bar>& seqrefx = lua["x"];
|
|
std::list<bar>& seqrefy = lua["y"];
|
|
REQUIRE(&seqrefx == &seqrefy);
|
|
REQUIRE(seqrefx.size() == 3);
|
|
auto result = lua.safe_script("a.readonly_seq = value", sol::script_pass_on_error);
|
|
REQUIRE_FALSE(result.valid());
|
|
}
|
|
|
|
TEST_CASE("containers/to_args", "Test that the to_args abstractions works") {
|
|
sol::state lua;
|
|
lua.open_libraries();
|
|
|
|
auto result1 = lua.safe_script("function f (a, b, c, d) print(a, b, c, d) return a, b, c, d end", sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
|
|
sol::function f = lua["f"];
|
|
int a, b, c, d;
|
|
|
|
std::vector<int> v2 { 3, 4 };
|
|
sol::tie(a, b, c, d) = f(1, 2, sol::as_args(v2));
|
|
REQUIRE(a == 1);
|
|
REQUIRE(b == 2);
|
|
REQUIRE(c == 3);
|
|
REQUIRE(d == 4);
|
|
|
|
std::set<int> v4 { 7, 6, 8, 5 };
|
|
sol::tie(a, b, c, d) = f(sol::as_args(v4));
|
|
REQUIRE(a == 5);
|
|
REQUIRE(b == 6);
|
|
REQUIRE(c == 7);
|
|
REQUIRE(d == 8);
|
|
|
|
int v3[] = { 10, 11, 12 };
|
|
sol::tie(a, b, c, d) = f(9, sol::as_args(v3));
|
|
REQUIRE(a == 9);
|
|
REQUIRE(b == 10);
|
|
REQUIRE(c == 11);
|
|
REQUIRE(d == 12);
|
|
}
|
|
|
|
TEST_CASE("containers/append idiom", "ensure the append-idiom works as intended") {
|
|
sol::state lua;
|
|
lua.open_libraries(sol::lib::base);
|
|
|
|
auto result1 = lua.safe_script(
|
|
R"(
|
|
function f_fill(vec)
|
|
print("#vec in lua: " .. #vec)
|
|
for k = 1, #vec do
|
|
vec[k] = k
|
|
end
|
|
print("#vec in lua: " .. #vec)
|
|
end
|
|
function f_append(vec)
|
|
print("#vec in lua: " .. #vec)
|
|
vec[Issue-vec] = -10456407
|
|
vec[Issue-vec + 1] = -54
|
|
print("#vec in lua: " .. #vec)
|
|
end
|
|
)",
|
|
sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
|
|
std::vector<int> fill_cmp { 1, 2, 3 };
|
|
std::vector<int> append_cmp { -1, -1, -10456407, -54 };
|
|
|
|
std::vector<int> vec1 { -1, -1, -1 };
|
|
std::vector<int> vec2 { -1, -1, -1 };
|
|
|
|
REQUIRE(vec1.size() == 3);
|
|
lua["f_fill"](vec1);
|
|
REQUIRE(vec1.size() == 3);
|
|
REQUIRE(vec1 == fill_cmp);
|
|
|
|
REQUIRE(vec2.size() == 3);
|
|
lua["f_append"](vec2);
|
|
REQUIRE(vec2.size() == 4);
|
|
REQUIRE(vec2 == append_cmp);
|
|
}
|
|
|
|
TEST_CASE("containers/non_copyable", "make sure non-copyable types in containers behave properly when stored as a member variable in a bound usertype") {
|
|
struct test {
|
|
std::vector<non_copyable> b;
|
|
|
|
test() : b() {
|
|
}
|
|
test(test&&) = default;
|
|
test& operator=(test&&) = default;
|
|
test(const test&) = delete;
|
|
test& operator=(const test&) = delete;
|
|
};
|
|
|
|
SECTION("normal") {
|
|
sol::state lua;
|
|
lua.new_usertype<test>("test", "b", sol::readonly(&test::b));
|
|
|
|
lua["v"] = std::vector<non_copyable> {};
|
|
|
|
auto pfr = lua.safe_script("t = test.new() t.b = v", sol::script_pass_on_error);
|
|
REQUIRE_FALSE(pfr.valid());
|
|
}
|
|
}
|
|
|
|
TEST_CASE("containers/pairs", "test how well pairs work with the underlying system") {
|
|
using pair_arr_t = std::pair<std::string, int>[5];
|
|
using arr_t = int[5];
|
|
|
|
sol::state lua;
|
|
|
|
lua.open_libraries(sol::lib::base);
|
|
|
|
std::vector<std::pair<std::string, int>> a { { "one", 1 }, { "two", 2 }, { "three", 3 }, { "four", 4 }, { "five", 5 } };
|
|
std::array<std::pair<std::string, int>, 5> b { { { "one", 1 }, { "two", 2 }, { "three", 3 }, { "four", 4 }, { "five", 5 } } };
|
|
pair_arr_t c { { "one", 1 }, { "two", 2 }, { "three", 3 }, { "four", 4 }, { "five", 5 } };
|
|
arr_t d = { 1, 2, 3, 4, 5 };
|
|
|
|
lua["a"] = std::ref(a);
|
|
lua["b"] = &b;
|
|
lua["c"] = std::ref(c);
|
|
lua["d"] = &d;
|
|
|
|
auto result1 = lua.safe_script("av1, av2 = a:get(1)", sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
auto result2 = lua.safe_script("bv1, bv2 = b:get(1)", sol::script_pass_on_error);
|
|
REQUIRE(result2.valid());
|
|
auto result3 = lua.safe_script("cv1, cv2 = c:get(1)", sol::script_pass_on_error);
|
|
REQUIRE(result3.valid());
|
|
auto result4 = lua.safe_script("dv1, dv2 = d:get(1)", sol::script_pass_on_error);
|
|
REQUIRE(result4.valid());
|
|
|
|
std::vector<std::pair<std::string, int>>& la = lua["a"];
|
|
std::array<std::pair<std::string, int>, 5>& lb = lua["b"];
|
|
pair_arr_t* plc = lua["c"];
|
|
pair_arr_t& lc = *plc;
|
|
arr_t* pld = lua["d"];
|
|
arr_t& ld = *pld;
|
|
|
|
std::pair<std::string, int>& va = la[0];
|
|
std::pair<std::string, int>& vb = lb[0];
|
|
std::pair<std::string, int>& vc = lc[0];
|
|
int& vd = ld[0];
|
|
|
|
std::string av1 = lua["av1"];
|
|
int av2 = lua["av2"];
|
|
std::string bv1 = lua["bv1"];
|
|
int bv2 = lua["bv2"];
|
|
std::string cv1 = lua["cv1"];
|
|
int cv2 = lua["cv2"];
|
|
int dv1 = lua["dv1"];
|
|
sol::lua_nil_t dv2 = lua["dv2"];
|
|
|
|
REQUIRE(va.first == "one");
|
|
REQUIRE(va.second == 1);
|
|
REQUIRE(vb.first == "one");
|
|
REQUIRE(vb.second == 1);
|
|
REQUIRE(vc.first == "one");
|
|
REQUIRE(vc.second == 1);
|
|
REQUIRE(vd == 1);
|
|
|
|
REQUIRE(av1 == "one");
|
|
REQUIRE(av2 == 1);
|
|
REQUIRE(bv1 == "one");
|
|
REQUIRE(bv2 == 1);
|
|
REQUIRE(cv1 == "one");
|
|
REQUIRE(cv2 == 1);
|
|
REQUIRE(dv1 == 1);
|
|
REQUIRE(dv2 == sol::lua_nil);
|
|
}
|
|
|
|
TEST_CASE("containers/pointer types", "check that containers with unique usertypes and pointers or something") {
|
|
struct base_t {
|
|
virtual int get() const = 0;
|
|
virtual ~base_t() {
|
|
}
|
|
};
|
|
|
|
struct derived_1_t : base_t {
|
|
virtual int get() const override {
|
|
return 250;
|
|
}
|
|
};
|
|
|
|
struct derived_2_t : base_t {
|
|
virtual int get() const override {
|
|
return 500;
|
|
}
|
|
};
|
|
|
|
sol::state lua;
|
|
lua.open_libraries(sol::lib::base);
|
|
derived_1_t d1;
|
|
derived_2_t d2;
|
|
|
|
std::vector<std::unique_ptr<base_t>> v1;
|
|
v1.push_back(std::make_unique<derived_1_t>());
|
|
v1.push_back(std::make_unique<derived_2_t>());
|
|
|
|
std::vector<base_t*> v2;
|
|
v2.push_back(&d1);
|
|
v2.push_back(&d2);
|
|
lua["c1"] = std::move(v1);
|
|
lua["c2"] = &v2;
|
|
|
|
auto result1 = lua.safe_script("b1 = c1[1]", sol::script_pass_on_error);
|
|
REQUIRE(result1.valid());
|
|
base_t* b1 = lua["b1"];
|
|
int val1 = b1->get();
|
|
REQUIRE(val1 == 250);
|
|
|
|
auto result2 = lua.safe_script("b2 = c2[2]", sol::script_pass_on_error);
|
|
REQUIRE(result2.valid());
|
|
base_t* b2 = lua["b2"];
|
|
int val2 = b2->get();
|
|
REQUIRE(val2 == 500);
|
|
}
|
|
|
|
TEST_CASE("containers/keep alive", "containers are kept alive even if they are returned as a temporary") {
|
|
sol::state lua;
|
|
lua.open_libraries(sol::lib::base, sol::lib::table);
|
|
|
|
#define PATTERN() 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
|
|
lua["get_collection"] = []() {
|
|
return std::vector<int>({ PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN(),
|
|
PATTERN() });
|
|
};
|
|
#undef PATTERN
|
|
|
|
sol::optional<sol::error> maybe_error = lua.safe_script(R"lua(
|
|
print("LET'S GET IT BAYBEEE!")
|
|
for i, v in pairs(get_collection()) do
|
|
collectgarbage()
|
|
collectgarbage()
|
|
local index = i - 1
|
|
print(i, index, (index % 10), v)
|
|
assert((index % 10) == v)
|
|
end
|
|
collectgarbage()
|
|
collectgarbage()
|
|
print("YEEEAH!")
|
|
)lua");
|
|
REQUIRE_FALSE(maybe_error.has_value());
|
|
}
|