740 lines
20 KiB
C++
740 lines
20 KiB
C++
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// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2018 Intel Corporation
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#include "../test_precomp.hpp"
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#include <opencv2/gapi/util/variant.hpp>
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#include <cstddef> //std::max_align_t
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namespace opencv_test
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{
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namespace
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{
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typedef util::variant<int, std::string> TestVar;
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typedef util::variant<int, float> TestVar2;
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}
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TEST(Variant, EmptyCTor)
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{
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util::variant<int> vi;
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EXPECT_EQ(0, util::get<int>(vi));
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util::variant<int, std::string> vis;
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EXPECT_EQ(0, util::get<int>(vis));
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util::variant<std::string> vs;
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EXPECT_EQ("", util::get<std::string>(vs));
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util::variant<std::string, int> vsi;
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EXPECT_EQ("", util::get<std::string>(vsi));
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}
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TEST(Variant, ConvertingCTorMove)
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{
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util::variant<int> vi(42);
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EXPECT_EQ(0u, vi.index());
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EXPECT_EQ(42, util::get<int>(vi));
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util::variant<int, std::string> vis(2017);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(2017, util::get<int>(vis));
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util::variant<int, std::string> vis2(std::string("2017"));
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EXPECT_EQ(1u, vis2.index());
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EXPECT_EQ("2017", util::get<std::string>(vis2));
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util::variant<std::string> vs(std::string("2017"));
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EXPECT_EQ(0u, vs.index());
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EXPECT_EQ("2017", util::get<std::string>(vs));
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util::variant<std::string, int> vsi(std::string("2017"));
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EXPECT_EQ(0u, vsi.index());
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EXPECT_EQ("2017", util::get<std::string>(vsi));
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std::string rvs("2017");
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util::variant<std::string, int> vsi3(std::move(rvs));
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EXPECT_EQ(0u, vsi3.index());
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EXPECT_EQ("2017", util::get<std::string>(vsi3));
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//C++ standard state that std::string instance that was moved from stays in valid, but unspecified state.
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//So the best assumption we can made here is that s is not the same as it was before move.
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EXPECT_NE("2017", rvs) <<"Rvalue source argument was not moved from while should?";
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util::variant<std::string, int> vsi2(42);
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EXPECT_EQ(1u, vsi2.index());
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EXPECT_EQ(42, util::get<int>(vsi2));
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}
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TEST(Variant, ConvertingCTorCopy)
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{
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const int i42 = 42;
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const int i17 = 2017;
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const std::string s17 = "2017";
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std::string s17_lvref = s17;
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util::variant<int> vi(i42);
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EXPECT_EQ(0u, vi.index());
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EXPECT_EQ(i42, util::get<int>(vi));
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util::variant<int, std::string> vis(i17);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(i17, util::get<int>(vis));
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util::variant<int, std::string> vis2(s17);
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EXPECT_EQ(1u, vis2.index());
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EXPECT_EQ(s17, util::get<std::string>(vis2));
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util::variant<std::string> vs(s17);
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EXPECT_EQ(0u, vs.index());
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EXPECT_EQ(s17, util::get<std::string>(vs));
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util::variant<std::string> vs_lv(s17_lvref);
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EXPECT_EQ(0u, vs_lv.index());
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EXPECT_EQ(s17, s17_lvref);
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EXPECT_EQ(s17_lvref, util::get<std::string>(vs_lv));
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util::variant<std::string, int> vsi(s17);
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EXPECT_EQ(0u, vsi.index());
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EXPECT_EQ(s17, util::get<std::string>(vsi));
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util::variant<std::string, int> vsi2(i42);
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EXPECT_EQ(1u, vsi2.index());
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EXPECT_EQ(i42, util::get<int>(vsi2));
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}
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TEST(Variant, CopyMoveCTor)
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{
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const TestVar tvconst(std::string("42"));
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TestVar tv = tvconst;
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EXPECT_EQ( 1u, tv.index());
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EXPECT_EQ("42", util::get<std::string>(tv));
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TestVar tv2(TestVar(40+2));
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EXPECT_EQ( 0u, tv2.index());
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EXPECT_EQ( 42, util::get<int>(tv2));
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}
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TEST(Variant, Assign_Basic)
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{
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TestVar vis;
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(0, util::get<int>(vis));
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vis = 42;
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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}
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TEST(Variant, Assign_LValueRef)
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{
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TestVar vis;
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(0, util::get<int>(vis));
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int val = 42;
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vis = val;
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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}
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TEST(Variant, Assign_ValueUpdate_SameType)
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{
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TestVar vis(42);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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vis = 43;
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(43, util::get<int>(vis));
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}
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TEST(Variant, Assign_ValueUpdate_DiffType)
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{
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TestVar vis(42);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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vis = std::string("42");
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EXPECT_EQ(1u, vis.index());
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EXPECT_EQ("42", util::get<std::string>(vis));
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}
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TEST(Variant, Assign_RValueRef_DiffType)
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{
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TestVar vis(42);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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std::string s("42");
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vis = std::move(s);
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EXPECT_EQ(1u, vis.index());
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EXPECT_EQ("42", util::get<std::string>(vis));
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//C++ standard state that std::string instance that was moved from stays in valid, but unspecified state.
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//So the best assumption we can made here is that s is not the same as it was before move.
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EXPECT_NE("42", s) << "right hand side argument of assignment operation was not moved from while should?";
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}
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TEST(Variant, Assign_RValueRef_SameType)
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{
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TestVar vis(std::string("43"));
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EXPECT_EQ(1u, vis.index());
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EXPECT_EQ("43", util::get<std::string>(vis));
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std::string s("42");
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vis = std::move(s);
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EXPECT_EQ(1u, vis.index());
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EXPECT_EQ("42", util::get<std::string>(vis));
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//C++ standard state that std::string instance that was moved from stays in valid, but unspecified state.
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//So the best assumption we can made here is that s is not the same as it was before move.
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EXPECT_NE("42", s) << "right hand side argument of assignment operation was not moved from while should?";
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}
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TEST(Variant, Assign_LValueRef_DiffType)
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{
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TestVar vis(42);
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EXPECT_EQ(0u, vis.index());
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EXPECT_EQ(42, util::get<int>(vis));
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std::string s("42");
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vis = s;
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EXPECT_EQ(1u, vis.index());
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EXPECT_EQ("42", util::get<std::string>(vis));
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EXPECT_EQ("42", s) << "right hand side argument of assignment operation was moved from while should not ?";
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}
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TEST(Variant, Assign_ValueUpdate_Const_Variant)
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{
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TestVar va(42);
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const TestVar vb(43);
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EXPECT_EQ(0u, va.index());
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EXPECT_EQ(42, util::get<int>(va));
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EXPECT_EQ(0u, vb.index());
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EXPECT_EQ(43, util::get<int>(vb));
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va = vb;
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EXPECT_EQ(0u, va.index());
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EXPECT_EQ(43, util::get<int>(va));
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}
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TEST(Variant, Assign_ValueUpdate_Const_DiffType_Variant)
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{
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TestVar va(42);
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const TestVar vb(std::string("42"));
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EXPECT_EQ(0u, va.index());
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EXPECT_EQ(42, util::get<int>(va));
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EXPECT_EQ(1u, vb.index());
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EXPECT_EQ("42", util::get<std::string>(vb));
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va = vb;
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EXPECT_EQ(1u, va.index());
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EXPECT_EQ("42", util::get<std::string>(va));
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}
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TEST(Variant, Assign_Move_Variant)
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{
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TestVar va(42);
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TestVar vb(std::string("42"));
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TestVar vd(std::string("43"));
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TestVar vc(43);
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EXPECT_EQ(0u, va.index());
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EXPECT_EQ(42, util::get<int>(va));
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EXPECT_EQ(1u, vb.index());
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EXPECT_EQ("42", util::get<std::string>(vb));
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EXPECT_EQ(0u, vc.index());
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EXPECT_EQ(43, util::get<int>(vc));
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EXPECT_EQ(1u, vd.index());
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EXPECT_EQ("43", util::get<std::string>(vd));
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va = std::move(vb);
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EXPECT_EQ(1u, va.index());
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EXPECT_EQ("42", util::get<std::string>(va));
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EXPECT_EQ(1u, vb.index());
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EXPECT_EQ("", util::get<std::string>(vb));
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vb = std::move(vd);
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EXPECT_EQ(1u, vb.index());
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EXPECT_EQ("43", util::get<std::string>(vb));
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EXPECT_EQ(1u, vd.index());
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EXPECT_EQ("", util::get<std::string>(vd));
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va = std::move(vc);
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EXPECT_EQ(0u, va.index());
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EXPECT_EQ(43, util::get<int>(va));
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}
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TEST(Variant, Swap_SameIndex)
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{
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TestVar tv1(42);
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TestVar tv2(43);
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EXPECT_EQ(0u, tv1.index());
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EXPECT_EQ(42, util::get<int>(tv1));
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EXPECT_EQ(0u, tv2.index());
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EXPECT_EQ(43, util::get<int>(tv2));
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tv1.swap(tv2);
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EXPECT_EQ(0u, tv1.index());
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EXPECT_EQ(43, util::get<int>(tv1));
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EXPECT_EQ(0u, tv2.index());
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EXPECT_EQ(42, util::get<int>(tv2));
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}
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TEST(Variant, Swap_DiffIndex)
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{
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TestVar2 tv1(42);
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TestVar2 tv2(3.14f);
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EXPECT_EQ(0u, tv1.index());
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EXPECT_EQ(42, util::get<int>(tv1));
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EXPECT_EQ(1u, tv2.index());
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EXPECT_EQ(3.14f, util::get<float>(tv2));
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tv1.swap(tv2);
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EXPECT_EQ(0u, tv2.index());
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EXPECT_EQ(42, util::get<int>(tv2));
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EXPECT_EQ(1u, tv1.index());
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EXPECT_EQ(3.14f, util::get<float>(tv1));
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}
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TEST(Variant, GetIf)
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{
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const TestVar cv(42);
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// Test const& get_if()
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EXPECT_EQ(nullptr, util::get_if<std::string>(&cv));
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ASSERT_NE(nullptr, util::get_if<int>(&cv));
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EXPECT_EQ(42, *util::get_if<int>(&cv));
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// Test &get_if
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TestVar cv2(std::string("42"));
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EXPECT_EQ(nullptr, util::get_if<int>(&cv2));
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ASSERT_NE(nullptr, util::get_if<std::string>(&cv2));
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EXPECT_EQ("42", *util::get_if<std::string>(&cv2));
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}
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TEST(Variant, Get)
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{
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const TestVar cv(42);
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// Test const& get()
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EXPECT_EQ(42, util::get<int>(cv));
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EXPECT_THROW(util::get<std::string>(cv), util::bad_variant_access);
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// Test &get
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TestVar cv2(std::string("42"));
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EXPECT_EQ("42", util::get<std::string>(cv2));
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EXPECT_THROW(util::get<int>(cv2), util::bad_variant_access);
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}
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TEST(Variant, GetIndexed)
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{
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const TestVar cv(42);
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// Test const& get()
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EXPECT_EQ(42, util::get<0>(cv));
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EXPECT_THROW(util::get<1>(cv), util::bad_variant_access);
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// Test &get
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TestVar cv2(std::string("42"));
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EXPECT_EQ("42", util::get<1>(cv2));
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EXPECT_THROW(util::get<0>(cv2), util::bad_variant_access);
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, GetWrite)
|
||
|
|
{
|
||
|
|
util::variant<int, std::string> v(42);
|
||
|
|
EXPECT_EQ(42, util::get<int>(v));
|
||
|
|
|
||
|
|
util::get<int>(v) = 43;
|
||
|
|
EXPECT_EQ(43, util::get<int>(v));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, NoDefaultCtor)
|
||
|
|
{
|
||
|
|
struct MyType
|
||
|
|
{
|
||
|
|
int m_a;
|
||
|
|
MyType() = delete;
|
||
|
|
};
|
||
|
|
|
||
|
|
// This code MUST compile
|
||
|
|
util::variant<int, MyType> var;
|
||
|
|
SUCCEED() << "Code compiled";
|
||
|
|
|
||
|
|
// At the same time, util::variant<MyType, ...> MUST NOT.
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, MonoState)
|
||
|
|
{
|
||
|
|
struct MyType
|
||
|
|
{
|
||
|
|
int m_a;
|
||
|
|
explicit MyType(int a) : m_a(a) {}
|
||
|
|
MyType() = delete;
|
||
|
|
};
|
||
|
|
|
||
|
|
util::variant<util::monostate, MyType> var;
|
||
|
|
EXPECT_EQ(0u, var.index());
|
||
|
|
|
||
|
|
var = MyType{42};
|
||
|
|
EXPECT_EQ(1u, var.index());
|
||
|
|
EXPECT_EQ(42, util::get<MyType>(var).m_a);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
TEST(Variant, Eq)
|
||
|
|
{
|
||
|
|
TestVar v1(42), v2(std::string("42"));
|
||
|
|
TestVar v3(v1), v4(v2);
|
||
|
|
|
||
|
|
EXPECT_TRUE(v1 == v3);
|
||
|
|
EXPECT_TRUE(v2 == v4);
|
||
|
|
EXPECT_TRUE(v1 != v2);
|
||
|
|
EXPECT_TRUE(v3 != v4);
|
||
|
|
|
||
|
|
EXPECT_FALSE(v1 == v2);
|
||
|
|
EXPECT_FALSE(v3 == v4);
|
||
|
|
EXPECT_FALSE(v1 != v3);
|
||
|
|
EXPECT_FALSE(v2 != v4);
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, Eq_Monostate)
|
||
|
|
{
|
||
|
|
using TestVar3 = util::variant<util::monostate, int>;
|
||
|
|
TestVar3 v1;
|
||
|
|
TestVar3 v2(42);
|
||
|
|
|
||
|
|
EXPECT_NE(v1, v2);
|
||
|
|
|
||
|
|
v2 = util::monostate{};
|
||
|
|
EXPECT_EQ(v1, v2);
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, VectorOfVariants)
|
||
|
|
{
|
||
|
|
std::vector<TestVar> vv1(1024);
|
||
|
|
std::vector<TestVar> vv2(1024);
|
||
|
|
|
||
|
|
EXPECT_TRUE(vv1 == vv2);
|
||
|
|
|
||
|
|
std::vector<TestVar> vv3(2048, TestVar(std::string("42")));
|
||
|
|
|
||
|
|
// Just test chat the below code compiles:
|
||
|
|
// 1: internal copy of variants from one vector to another,
|
||
|
|
// with probable reallocation of 1st vector to host all elements
|
||
|
|
std::copy(vv1.begin(), vv1.end(), std::back_inserter(vv2));
|
||
|
|
EXPECT_EQ(2048u, vv2.size());
|
||
|
|
|
||
|
|
// 2: truncation of vector, with probable destruction of its tail memory
|
||
|
|
vv2.resize(1024);
|
||
|
|
EXPECT_EQ(1024u, vv2.size());
|
||
|
|
|
||
|
|
// 3. vector assignment, with overwriting underlying variants
|
||
|
|
vv2 = vv3;
|
||
|
|
EXPECT_EQ(2048u, vv2.size());
|
||
|
|
EXPECT_TRUE(vv2 == vv3);
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, HoldsAlternative)
|
||
|
|
{
|
||
|
|
TestVar v(42);
|
||
|
|
EXPECT_TRUE (util::holds_alternative<int> (v));
|
||
|
|
EXPECT_FALSE(util::holds_alternative<std::string>(v));
|
||
|
|
|
||
|
|
v = std::string("42");
|
||
|
|
EXPECT_FALSE(util::holds_alternative<int> (v));
|
||
|
|
EXPECT_TRUE (util::holds_alternative<std::string>(v));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, Sizeof)
|
||
|
|
{
|
||
|
|
//variant has to store index of the contained type as well as the type itself
|
||
|
|
EXPECT_EQ(2 * sizeof(size_t), (sizeof(util::variant<int, char>)));
|
||
|
|
#if !defined(__GNUG__) || __GNUG__ >= 5
|
||
|
|
// GCC versions prior to 5.0 have limited C++11 support, e.g.
|
||
|
|
// no std::max_align_t defined
|
||
|
|
EXPECT_EQ((sizeof(std::max_align_t) + std::max(sizeof(size_t), alignof(std::max_align_t))), (sizeof(util::variant<std::max_align_t, char>)));
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, EXT_IndexOf)
|
||
|
|
{
|
||
|
|
struct MyType{};
|
||
|
|
class MyClass{};
|
||
|
|
|
||
|
|
using V = util::variant<util::monostate, int, double, char, float, MyType, MyClass>;
|
||
|
|
static_assert(0u == V::index_of<util::monostate>(), "Index is incorrect");
|
||
|
|
static_assert(1u == V::index_of<int >(), "Index is incorrect");
|
||
|
|
static_assert(2u == V::index_of<double >(), "Index is incorrect");
|
||
|
|
static_assert(3u == V::index_of<char >(), "Index is incorrect");
|
||
|
|
static_assert(4u == V::index_of<float >(), "Index is incorrect");
|
||
|
|
static_assert(5u == V::index_of<MyType >(), "Index is incorrect");
|
||
|
|
static_assert(6u == V::index_of<MyClass>(), "Index is incorrect");
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace test_validation
|
||
|
|
{
|
||
|
|
struct MyType
|
||
|
|
{
|
||
|
|
friend std::ostream& operator<<(std::ostream& out, const MyType& src)
|
||
|
|
{
|
||
|
|
return out << "MyType"; (void) src;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
class MyClass
|
||
|
|
{
|
||
|
|
friend std::ostream& operator<<(std::ostream& out, const MyClass& src)
|
||
|
|
{
|
||
|
|
return out << "MyClass"; (void) src;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct MyBoolParamIndexedVisitor : cv::util::static_indexed_visitor<bool, MyBoolParamIndexedVisitor>
|
||
|
|
{
|
||
|
|
MyBoolParamIndexedVisitor(std::ostream &output) : out(output) {}
|
||
|
|
|
||
|
|
template<class Type>
|
||
|
|
bool visit(std::size_t index, Type val, int check)
|
||
|
|
{
|
||
|
|
bool result = false;
|
||
|
|
out << index << ":" << val <<",";
|
||
|
|
if(std::is_same<Type, int>::value)
|
||
|
|
{
|
||
|
|
result = !memcmp(&val, &check, sizeof(int));
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::ostream &out;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct MyBoolNoParamNonIndexedVisitor : cv::util::static_indexed_visitor<bool, MyBoolNoParamNonIndexedVisitor>
|
||
|
|
{
|
||
|
|
MyBoolNoParamNonIndexedVisitor(std::ostream &output) : out(output) {}
|
||
|
|
|
||
|
|
template<class Type>
|
||
|
|
bool visit(std::size_t index, Type val)
|
||
|
|
{
|
||
|
|
out << index << ":" << val <<",";
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
std::ostream &out;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
struct MyVoidNoParamNonIndexedVisitor : cv::util::static_visitor<void, MyVoidNoParamNonIndexedVisitor>
|
||
|
|
{
|
||
|
|
MyVoidNoParamNonIndexedVisitor(std::ostream &output) : out(output) {}
|
||
|
|
|
||
|
|
template<class Type>
|
||
|
|
void visit(Type val)
|
||
|
|
{
|
||
|
|
out << val << ",";
|
||
|
|
}
|
||
|
|
|
||
|
|
std::ostream &out;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
struct MyVoidNoParamIndexedVisitor : cv::util::static_indexed_visitor<void, MyVoidNoParamIndexedVisitor>
|
||
|
|
{
|
||
|
|
MyVoidNoParamIndexedVisitor(std::ostream &output) : out(output) {}
|
||
|
|
|
||
|
|
template<class Type>
|
||
|
|
void visit(std::size_t Index, Type val)
|
||
|
|
{
|
||
|
|
out << Index << ":" << val <<",";
|
||
|
|
}
|
||
|
|
|
||
|
|
std::ostream &out;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, DynamicVisitor)
|
||
|
|
{
|
||
|
|
using V = cv::util::variant<int, double, char, float, test_validation::MyType, test_validation::MyClass>;
|
||
|
|
V var{42};
|
||
|
|
{
|
||
|
|
std::stringstream ss;
|
||
|
|
test_validation::MyBoolParamIndexedVisitor visitor(ss);
|
||
|
|
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var, int{42}));
|
||
|
|
EXPECT_EQ(std::string("0:42,"), ss.str());
|
||
|
|
}
|
||
|
|
|
||
|
|
std::stringstream ss;
|
||
|
|
test_validation::MyBoolNoParamNonIndexedVisitor visitor(ss);
|
||
|
|
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("0:42,"), ss.str());
|
||
|
|
|
||
|
|
var = double{1.0};
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var));
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,"), ss.str());
|
||
|
|
|
||
|
|
var = char{'a'};
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var));
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,"), ss.str());
|
||
|
|
|
||
|
|
var = float{6.0};
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var));
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyType{};
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var));
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,4:MyType,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyClass{};
|
||
|
|
EXPECT_TRUE(cv::util::visit(visitor, var));
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,4:MyType,5:MyClass,"), ss.str());
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, StaticVisitor)
|
||
|
|
{
|
||
|
|
using V = cv::util::variant<int, double, char, float, test_validation::MyType, test_validation::MyClass>;
|
||
|
|
V var{42};
|
||
|
|
std::stringstream ss;
|
||
|
|
test_validation::MyVoidNoParamNonIndexedVisitor visitor(ss);
|
||
|
|
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,"), ss.str());
|
||
|
|
|
||
|
|
var = double{1.0};
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,1,"), ss.str());
|
||
|
|
|
||
|
|
var = char{'a'};
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,1,a,"), ss.str());
|
||
|
|
|
||
|
|
var = float{6.0};
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,1,a,6,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyType{};
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,1,a,6,MyType,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyClass{};
|
||
|
|
cv::util::visit(visitor, var);
|
||
|
|
EXPECT_EQ(std::string("42,1,a,6,MyType,MyClass,"), ss.str());
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(Variant, StaticIndexedVisitor)
|
||
|
|
{
|
||
|
|
using V = cv::util::variant<int, double, char, float, test_validation::MyType, test_validation::MyClass>;
|
||
|
|
V var{42};
|
||
|
|
|
||
|
|
std::stringstream ss;
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor {ss}, var);
|
||
|
|
EXPECT_EQ(std::string("0:42,"), ss.str());
|
||
|
|
|
||
|
|
var = double{1.0};
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor (ss), var);
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,"), ss.str());
|
||
|
|
|
||
|
|
var = char{'a'};
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor (ss), var);
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,"), ss.str());
|
||
|
|
|
||
|
|
var = float{6.0};
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor (ss), var);
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyType{};
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor (ss), var);
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,4:MyType,"), ss.str());
|
||
|
|
|
||
|
|
var = test_validation::MyClass{};
|
||
|
|
cv::util::visit(test_validation::MyVoidNoParamIndexedVisitor (ss), var);
|
||
|
|
EXPECT_EQ(std::string("0:42,1:1,2:a,3:6,4:MyType,5:MyClass,"), ss.str());
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
TEST(Variant, LambdaVisitor)
|
||
|
|
{
|
||
|
|
using V = cv::util::variant<int, double, char, float, test_validation::MyType, test_validation::MyClass>;
|
||
|
|
V var{42};
|
||
|
|
{
|
||
|
|
cv::util::visit(cv::util::overload_lambdas(
|
||
|
|
[](int value) {
|
||
|
|
EXPECT_EQ(42, value);
|
||
|
|
},
|
||
|
|
[](double) {
|
||
|
|
ADD_FAILURE() << "can't be called for `double`";
|
||
|
|
},
|
||
|
|
[](char) {
|
||
|
|
ADD_FAILURE() << "can't be called for `char`";
|
||
|
|
},
|
||
|
|
[](float) {
|
||
|
|
ADD_FAILURE() << "can't be called for `float`";
|
||
|
|
},
|
||
|
|
[](test_validation::MyType) {
|
||
|
|
ADD_FAILURE() << "can't be called for `MyType`";
|
||
|
|
},
|
||
|
|
[](test_validation::MyClass) {
|
||
|
|
ADD_FAILURE() << "can't be called for `MyClass`";
|
||
|
|
},
|
||
|
|
[](std::string) {
|
||
|
|
ADD_FAILURE() << "can't be called for `std::string`, invalid type";
|
||
|
|
}
|
||
|
|
), var);
|
||
|
|
}
|
||
|
|
|
||
|
|
var = 'c';
|
||
|
|
{
|
||
|
|
cv::util::visit(cv::util::overload_lambdas(
|
||
|
|
[](int) {
|
||
|
|
ADD_FAILURE() << "can't be called for `int`";
|
||
|
|
},
|
||
|
|
[](double) {
|
||
|
|
ADD_FAILURE() << "can't be called for `double`";
|
||
|
|
},
|
||
|
|
[](char value) {
|
||
|
|
EXPECT_EQ('c', value);
|
||
|
|
},
|
||
|
|
[](float) {
|
||
|
|
ADD_FAILURE() << "can't be called for `float`";
|
||
|
|
},
|
||
|
|
[](test_validation::MyType) {
|
||
|
|
ADD_FAILURE() << "can't be called for `MyType`";
|
||
|
|
},
|
||
|
|
[](test_validation::MyClass) {
|
||
|
|
ADD_FAILURE() << "can't be called for `MyClass`";
|
||
|
|
},
|
||
|
|
[](std::string) {
|
||
|
|
ADD_FAILURE() << "can't be called for `std::string`, invalid type";
|
||
|
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}
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||
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), var);
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||
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}
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||
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}
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||
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} // namespace opencv_test
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