[hlsl-writer] Emit array accessors.
This CL adds array accessor expressions to the HLSL backend.
Bug: tint:7
Change-Id: I46d60f5d8ef74fee2a2f4da48c2d792969bfa365
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25820
Reviewed-by: David Neto <dneto@google.com>
diff --git a/src/writer/hlsl/generator_impl_array_accessor_test.cc b/src/writer/hlsl/generator_impl_array_accessor_test.cc
new file mode 100644
index 0000000..ecd5310
--- /dev/null
+++ b/src/writer/hlsl/generator_impl_array_accessor_test.cc
@@ -0,0 +1,62 @@
+// 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 <memory>
+
+#include "gtest/gtest.h"
+#include "src/ast/array_accessor_expression.h"
+#include "src/ast/identifier_expression.h"
+#include "src/ast/module.h"
+#include "src/ast/scalar_constructor_expression.h"
+#include "src/ast/sint_literal.h"
+#include "src/ast/type/i32_type.h"
+#include "src/writer/hlsl/generator_impl.h"
+
+namespace tint {
+namespace writer {
+namespace hlsl {
+namespace {
+
+using HlslGeneratorImplTest = testing::Test;
+
+TEST_F(HlslGeneratorImplTest, EmitExpression_ArrayAccessor) {
+ ast::type::I32Type i32;
+ auto lit = std::make_unique<ast::SintLiteral>(&i32, 5);
+ auto idx = std::make_unique<ast::ScalarConstructorExpression>(std::move(lit));
+ auto ary = std::make_unique<ast::IdentifierExpression>("ary");
+
+ ast::ArrayAccessorExpression expr(std::move(ary), std::move(idx));
+
+ ast::Module m;
+ GeneratorImpl g(&m);
+ ASSERT_TRUE(g.EmitExpression(&expr)) << g.error();
+ EXPECT_EQ(g.result(), "ary[5]");
+}
+
+TEST_F(HlslGeneratorImplTest, EmitArrayAccessor) {
+ auto ary = std::make_unique<ast::IdentifierExpression>("ary");
+ auto idx = std::make_unique<ast::IdentifierExpression>("idx");
+
+ ast::ArrayAccessorExpression expr(std::move(ary), std::move(idx));
+
+ ast::Module m;
+ GeneratorImpl g(&m);
+ ASSERT_TRUE(g.EmitExpression(&expr)) << g.error();
+ EXPECT_EQ(g.result(), "ary[idx]");
+}
+
+} // namespace
+} // namespace hlsl
+} // namespace writer
+} // namespace tint
