src/writer/wgsl/generator_impl_array_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, ArrayAccessor) {
  Global("ary", ty.array<i32, 10>(), ast::StorageClass::kPrivate);
  auto* expr = IndexAccessor("ary", 5);
  WrapInFunction(expr);

  GeneratorImpl& gen = Build();

  std::stringstream out;
  ASSERT_TRUE(gen.EmitExpression(out, expr)) << gen.error();
  EXPECT_EQ(out.str(), "ary[5]");
}

TEST_F(WgslGeneratorImplTest, ArrayAccessor_OfDref) {
  Global("ary", ty.array<i32, 10>(), ast::StorageClass::kPrivate);

  auto* p = Const("p", nullptr, AddressOf("ary"));
  auto* expr = IndexAccessor(Deref("p"), 5);
  WrapInFunction(p, expr);

  GeneratorImpl& gen = Build();

  std::stringstream out;
  ASSERT_TRUE(gen.EmitExpression(out, expr)) << gen.error();
  EXPECT_EQ(out.str(), "(*(p))[5]");
}

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