src/writer/wgsl/generator_impl_member_accessor_test.cc

// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "src/writer/wgsl/test_helper.h"

namespace tint {
namespace writer {
namespace wgsl {
namespace {

using WgslGeneratorImplTest = TestHelper;

TEST_F(WgslGeneratorImplTest, EmitExpression_MemberAccessor) {
  auto* s = Structure("Data", {Member("mem", ty.f32())});
  Global("str", ty.Of(s), ast::StorageClass::kPrivate);

  auto* expr = MemberAccessor("str", "mem");
  WrapInFunction(expr);

  GeneratorImpl& gen = Build();

  std::stringstream out;
  ASSERT_TRUE(gen.EmitExpression(out, expr)) << gen.error();
  EXPECT_EQ(out.str(), "str.mem");
}

TEST_F(WgslGeneratorImplTest, EmitExpression_MemberAccessor_OfDref) {
  auto* s = Structure("Data", {Member("mem", ty.f32())});
  Global("str", ty.Of(s), ast::StorageClass::kPrivate);

  auto* p = Const("p", nullptr, AddressOf("str"));
  auto* expr = MemberAccessor(Deref("p"), "mem");
  WrapInFunction(p, expr);

  GeneratorImpl& gen = Build();

  std::stringstream out;
  ASSERT_TRUE(gen.EmitExpression(out, expr)) << gen.error();
  EXPECT_EQ(out.str(), "(*(p)).mem");
}

}  // namespace
}  // namespace wgsl
}  // namespace writer
}  // namespace tint