54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkFunction.h"
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#include "Test.h"
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static void test_add_five(skiatest::Reporter* r, SkFunction<int(int)>&& f) {
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REPORTER_ASSERT(r, f(3) == 8);
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REPORTER_ASSERT(r, f(4) == 9);
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}
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static int add_five(int x) { return x + 5; }
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struct AddFive {
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int operator()(int x) { return x + 5; };
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};
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DEF_TEST(Function, r) {
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// We should be able to turn a static function, an explicit functor, or a lambda
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// all into an SkFunction equally well.
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test_add_five(r, SkFunction<int(int)>(&add_five));
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test_add_five(r, SkFunction<int(int)>(AddFive()));
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test_add_five(r, SkFunction<int(int)>([](int x) { return x + 5; }));
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// AddFive and the lambda above are both small enough to test small-object optimization.
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// Now test a lambda that's much too large for the small-object optimization.
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int a = 1, b = 1, c = 1, d = 1, e = 1;
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test_add_five(r, SkFunction<int(int)>([&](int x) { return x + a + b + c + d + e; }));
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}
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DEF_TEST(Function_forwarding, r) {
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class MoveOnlyAdd5 : SkNoncopyable {
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public:
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MoveOnlyAdd5() {}
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MoveOnlyAdd5(MoveOnlyAdd5&&) {}
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MoveOnlyAdd5& operator=(MoveOnlyAdd5&&) { return *this; }
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int operator()(int x) { return x + 5; }
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};
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// Makes sure we forward the functor when constructing SkFunction.
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test_add_five(r, SkFunction<int(int)>(MoveOnlyAdd5()));
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// Makes sure we forward arguments when calling SkFunction.
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SkFunction<int(int, MoveOnlyAdd5&&, int)> b([](int x, MoveOnlyAdd5&& f, int y) {
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return x * f(y);
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});
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REPORTER_ASSERT(r, b(2, MoveOnlyAdd5(), 4) == 18);
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}
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