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// Copyright 2025 Steven Le Rouzic
//
// SPDX-License-Identifier: BSD-3-Clause
#include "asl/testing/testing.hpp"
#include "asl/types/function.hpp"
static_assert(asl::function_detail::can_be_stored_inline<int(*)(int, int, int)>);
static_assert(asl::function_detail::can_be_stored_inline<decltype([](){})>);
static_assert(asl::function_detail::can_be_stored_inline<decltype([]() static {})>);
static_assert(asl::function_detail::can_be_stored_inline<decltype([a = 1ULL, b = 2ULL](){ return a + b; })>); // NOLINT
static_assert(asl::function_detail::can_be_stored_inline<decltype([a = 1ULL, b = 2ULL]() mutable { return a = b++; })>); // NOLINT
static_assert(!asl::function_detail::can_be_stored_inline<decltype([a = 1ULL, b = 2ULL, c = 3ULL](){ return a + b + c; })>); // NOLINT
static int add(int x, int y)
{
return x + y;
}
ASL_TEST(function_pointer)
{
const asl::function<int(int, int)> fn = add;
ASL_TEST_EXPECT(fn(4, 5) == 9);
ASL_TEST_EXPECT(fn(40, 50) == 90);
}
ASL_TEST(lambda)
{
const asl::function<int(int, int)> fn = [](int a, int b) {
return a + b;
};
ASL_TEST_EXPECT(fn(4, 5) == 9);
}
ASL_TEST(lambda_static)
{
const asl::function<int(int, int)> fn = [](int a, int b) static {
return a + b;
};
ASL_TEST_EXPECT(fn(4, 5) == 9);
}
ASL_TEST(lambda_static_state)
{
const asl::function<int(int)> fn = [state = 0](int b) mutable {
state += b;
return state;
};
ASL_TEST_EXPECT(fn(1) == 1);
ASL_TEST_EXPECT(fn(2) == 3);
ASL_TEST_EXPECT(fn(3) == 6);
ASL_TEST_EXPECT(fn(4) == 10);
}
ASL_TEST(lambda_state)
{
int state = 0;
const asl::function<void(int)> fn = [&state](int x) {
state += x;
};
ASL_TEST_EXPECT(state == 0);
fn(5);
ASL_TEST_EXPECT(state == 5);
fn(4);
ASL_TEST_EXPECT(state == 9);
}
ASL_TEST(lambda_big_state)
{
int s0 = 0;
int s1 = 0;
int s2 = 0;
int s3 = 0;
const asl::function<void(int)> fn = [&](int x) {
s0 += x;
s1 += x + 1;
s2 += x + 2;
s3 += x + 3;
};
ASL_TEST_EXPECT(s0 == 0);
ASL_TEST_EXPECT(s1 == 0);
ASL_TEST_EXPECT(s2 == 0);
ASL_TEST_EXPECT(s3 == 0);
fn(5);
ASL_TEST_EXPECT(s0 == 5);
ASL_TEST_EXPECT(s1 == 6);
ASL_TEST_EXPECT(s2 == 7);
ASL_TEST_EXPECT(s3 == 8);
fn(4);
ASL_TEST_EXPECT(s0 == 9);
ASL_TEST_EXPECT(s1 == 11);
ASL_TEST_EXPECT(s2 == 13);
ASL_TEST_EXPECT(s3 == 15);
}
struct Functor
{
int state{};
int operator()(int x)
{
state += x;
return state;
}
};
ASL_TEST(functor)
{
const asl::function<int(int)> fn = Functor{};
ASL_TEST_EXPECT(fn(1) == 1);
ASL_TEST_EXPECT(fn(2) == 3);
ASL_TEST_EXPECT(fn(3) == 6);
ASL_TEST_EXPECT(fn(4) == 10);
}
ASL_TEST(copy_move_construct_small)
{
asl::function<int(int, int)> fn = [x = 0](int a, int b) mutable { return x++ + a + b; };
ASL_TEST_EXPECT(fn(1, 3) == 4);
asl::function<int(int, int)> fn2 = fn;
ASL_TEST_EXPECT(fn(1, 3) == 5);
ASL_TEST_EXPECT(fn2(5, 3) == 9);
asl::function<int(int, int)> fn3 = std::move(fn2);
ASL_TEST_EXPECT(fn(1, 3) == 6);
ASL_TEST_EXPECT(fn3(5, 3) == 10);
fn2 = fn;
ASL_TEST_EXPECT(fn(1, 3) == 7);
ASL_TEST_EXPECT(fn2(5, 3) == 11);
ASL_TEST_EXPECT(fn3(5, 3) == 11);
fn3 = std::move(fn);
ASL_TEST_EXPECT(fn2(5, 3) == 12);
ASL_TEST_EXPECT(fn3(5, 3) == 12);
}
ASL_TEST(copy_move_construct_big)
{
const int64_t v1 = 1;
const int64_t v2 = 2;
const int64_t v3 = 3;
const int64_t v4 = 4;
asl::function<int64_t(int)> fn = [=](int x) { return v1 + v2 + v3 + v4 + x; };
ASL_TEST_EXPECT(fn(1) == 11);
asl::function<int64_t(int)> fn2 = fn;
ASL_TEST_EXPECT(fn(3) == 13);
ASL_TEST_EXPECT(fn2(5) == 15);
asl::function<int64_t(int)> fn3 = std::move(fn2);
ASL_TEST_EXPECT(fn(1) == 11);
ASL_TEST_EXPECT(fn3(3) == 13);
fn2 = fn;
ASL_TEST_EXPECT(fn(1) == 11);
ASL_TEST_EXPECT(fn2(5) == 15);
ASL_TEST_EXPECT(fn3(3) == 13);
fn3 = std::move(fn);
ASL_TEST_EXPECT(fn2(5) == 15);
ASL_TEST_EXPECT(fn3(3) == 13);
}
ASL_TEST(replace)
{
asl::function<int(int)> fn = [](int x) { return x + 1; };
ASL_TEST_EXPECT(fn(5) == 6);
fn = [](int x) { return x + 3; };
ASL_TEST_EXPECT(fn(5) == 8);
}
static int foo(const asl::function<int(int, int)>& fn)
{
return fn(5, 5);
}
ASL_TEST(function_parameter)
{
ASL_TEST_EXPECT(foo(add) == 10);
ASL_TEST_EXPECT(foo([](int a, int b) { return a + b; }) == 10);
}
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