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// Copyright 2025 Steven Le Rouzic
//
// SPDX-License-Identifier: BSD-3-Clause
#include "asl/testing/testing.hpp"
#include "asl/types/function_ref.hpp"
static int add(int a, int b)
{
return a + b;
}
struct Functor
{
int state = 0;
int operator()(int x, int)
{
state += x;
return state;
}
};
static int invoke_fn_ref(asl::function_ref<int(int, int)> fn, int a, int b)
{
return fn(a, b);
}
ASL_TEST(function_ref)
{
const asl::function_ref<int(int, int)> fn(add);
ASL_TEST_EXPECT(invoke_fn_ref(fn, 4, 5) == 9);
ASL_TEST_EXPECT(invoke_fn_ref(add, 4, 5) == 9);
ASL_TEST_EXPECT(invoke_fn_ref([](int a, int b) { return a * b; }, 4, 5) == 20);
Functor fun;
ASL_TEST_EXPECT(invoke_fn_ref(fun, 4, 5) == 4);
ASL_TEST_EXPECT(invoke_fn_ref(fun, 4, 5) == 8);
ASL_TEST_EXPECT(invoke_fn_ref(fun, 4, 5) == 12);
asl::function_ref<int(int, int)> fn2 = fn;
ASL_TEST_EXPECT(invoke_fn_ref(fn2, 4, 5) == 9);
fn2 = [](int a, int b) { return a - b; };
ASL_TEST_EXPECT(invoke_fn_ref(fn2, 4, 5) == -1);
fn2 = fn;
ASL_TEST_EXPECT(invoke_fn_ref(fn2, 4, 5) == 9);
fn2 = add;
ASL_TEST_EXPECT(invoke_fn_ref(fn2, 4, 5) == 9);
}
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