src/tint/reader/wgsl/parser_impl_variable_attribute_test.cc - dawn - Git at Google

 // 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/tint/reader/wgsl/parser_impl_test_helper.h"

 namespace tint::reader::wgsl {
 namespace {

 TEST_F(ParserImplTest, Attribute_Location) {
     auto p = parser("location(4)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::LocationAttribute>());

     auto* loc = var_attr->As<ast::LocationAttribute>();
     EXPECT_EQ(loc->value, 4u);
 }

 TEST_F(ParserImplTest, Attribute_Location_MissingLeftParen) {
     auto p = parser("location 4)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:10: expected '(' for location attribute");
 }

 TEST_F(ParserImplTest, Attribute_Location_MissingRightParen) {
     auto p = parser("location(4");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:11: expected ')' for location attribute");
 }

 TEST_F(ParserImplTest, Attribute_Location_MissingValue) {
     auto p = parser("location()");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:10: expected signed integer literal for location attribute");
 }

 TEST_F(ParserImplTest, Attribute_Location_MissingInvalid) {
     auto p = parser("location(nan)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:10: expected signed integer literal for location attribute");
 }

 struct BuiltinData {
     const char* input;
     ast::Builtin result;
 };
 inline std::ostream& operator<<(std::ostream& out, BuiltinData data) {
     out << std::string(data.input);
     return out;
 }

 class BuiltinTest : public ParserImplTestWithParam<BuiltinData> {};

 TEST_P(BuiltinTest, Attribute_Builtin) {
     auto params = GetParam();
     auto p = parser(std::string("builtin(") + params.input + ")");

     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_TRUE(var_attr->Is<ast::BuiltinAttribute>());

     auto* builtin = var_attr->As<ast::BuiltinAttribute>();
     EXPECT_EQ(builtin->builtin, params.result);
 }
 INSTANTIATE_TEST_SUITE_P(
     ParserImplTest,
     BuiltinTest,
     testing::Values(BuiltinData{"position", ast::Builtin::kPosition},
                     BuiltinData{"vertex_index", ast::Builtin::kVertexIndex},
                     BuiltinData{"instance_index", ast::Builtin::kInstanceIndex},
                     BuiltinData{"front_facing", ast::Builtin::kFrontFacing},
                     BuiltinData{"frag_depth", ast::Builtin::kFragDepth},
                     BuiltinData{"local_invocation_id", ast::Builtin::kLocalInvocationId},
                     BuiltinData{"local_invocation_idx", ast::Builtin::kLocalInvocationIndex},
                     BuiltinData{"local_invocation_index", ast::Builtin::kLocalInvocationIndex},
                     BuiltinData{"global_invocation_id", ast::Builtin::kGlobalInvocationId},
                     BuiltinData{"workgroup_id", ast::Builtin::kWorkgroupId},
                     BuiltinData{"num_workgroups", ast::Builtin::kNumWorkgroups},
                     BuiltinData{"sample_index", ast::Builtin::kSampleIndex},
                     BuiltinData{"sample_mask", ast::Builtin::kSampleMask}));

 TEST_F(ParserImplTest, Attribute_Builtin_MissingLeftParen) {
     auto p = parser("builtin position)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected '(' for builtin attribute");
 }

 TEST_F(ParserImplTest, Attribute_Builtin_MissingRightParen) {
     auto p = parser("builtin(position");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:17: expected ')' for builtin attribute");
 }

 TEST_F(ParserImplTest, Attribute_Builtin_MissingValue) {
     auto p = parser("builtin()");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected identifier for builtin");
 }

 TEST_F(ParserImplTest, Attribute_Builtin_InvalidValue) {
     auto p = parser("builtin(other_thingy)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: invalid value for builtin attribute");
 }

 TEST_F(ParserImplTest, Attribute_Builtin_MissingInvalid) {
     auto p = parser("builtin(3)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected identifier for builtin");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_Flat) {
     auto p = parser("interpolate(flat)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

     auto* interp = var_attr->As<ast::InterpolateAttribute>();
     EXPECT_EQ(interp->type, ast::InterpolationType::kFlat);
     EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kNone);
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_Perspective_Center) {
     auto p = parser("interpolate(perspective, center)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

     auto* interp = var_attr->As<ast::InterpolateAttribute>();
     EXPECT_EQ(interp->type, ast::InterpolationType::kPerspective);
     EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kCenter);
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_Perspective_Centroid) {
     auto p = parser("interpolate(perspective, centroid)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

     auto* interp = var_attr->As<ast::InterpolateAttribute>();
     EXPECT_EQ(interp->type, ast::InterpolationType::kPerspective);
     EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kCentroid);
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_Linear_Sample) {
     auto p = parser("interpolate(linear, sample)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

     auto* interp = var_attr->As<ast::InterpolateAttribute>();
     EXPECT_EQ(interp->type, ast::InterpolationType::kLinear);
     EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kSample);
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_MissingLeftParen) {
     auto p = parser("interpolate flat)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:13: expected '(' for interpolate attribute");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_MissingRightParen) {
     auto p = parser("interpolate(flat");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:17: expected ')' for interpolate attribute");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_MissingFirstValue) {
     auto p = parser("interpolate()");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:13: invalid interpolation type");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_InvalidFirstValue) {
     auto p = parser("interpolate(other_thingy)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:13: invalid interpolation type");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_MissingSecondValue) {
     auto p = parser("interpolate(perspective,)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:25: invalid interpolation sampling");
 }

 TEST_F(ParserImplTest, Attribute_Interpolate_InvalidSecondValue) {
     auto p = parser("interpolate(perspective, nope)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:26: invalid interpolation sampling");
 }

 TEST_F(ParserImplTest, Attribute_Binding) {
     auto p = parser("binding(4)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_NE(var_attr, nullptr);
     ASSERT_FALSE(p->has_error());
     ASSERT_TRUE(var_attr->Is<ast::BindingAttribute>());

     auto* binding = var_attr->As<ast::BindingAttribute>();
     EXPECT_EQ(binding->value, 4u);
 }

 TEST_F(ParserImplTest, Attribute_Binding_MissingLeftParen) {
     auto p = parser("binding 4)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected '(' for binding attribute");
 }

 TEST_F(ParserImplTest, Attribute_Binding_MissingRightParen) {
     auto p = parser("binding(4");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:10: expected ')' for binding attribute");
 }

 TEST_F(ParserImplTest, Attribute_Binding_MissingValue) {
     auto p = parser("binding()");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected signed integer literal for binding attribute");
 }

 TEST_F(ParserImplTest, Attribute_Binding_MissingInvalid) {
     auto p = parser("binding(nan)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:9: expected signed integer literal for binding attribute");
 }

 TEST_F(ParserImplTest, Attribute_group) {
     auto p = parser("group(4)");
     auto attr = p->attribute();
     EXPECT_TRUE(attr.matched);
     EXPECT_FALSE(attr.errored);
     ASSERT_NE(attr.value, nullptr);
     auto* var_attr = attr.value->As<ast::Attribute>();
     ASSERT_FALSE(p->has_error());
     ASSERT_NE(var_attr, nullptr);
     ASSERT_TRUE(var_attr->Is<ast::GroupAttribute>());

     auto* group = var_attr->As<ast::GroupAttribute>();
     EXPECT_EQ(group->value, 4u);
 }

 TEST_F(ParserImplTest, Attribute_Group_MissingLeftParen) {
     auto p = parser("group 2)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:7: expected '(' for group attribute");
 }

 TEST_F(ParserImplTest, Attribute_Group_MissingRightParen) {
     auto p = parser("group(2");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:8: expected ')' for group attribute");
 }

 TEST_F(ParserImplTest, Attribute_Group_MissingValue) {
     auto p = parser("group()");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:7: expected signed integer literal for group attribute");
 }

 TEST_F(ParserImplTest, Attribute_Group_MissingInvalid) {
     auto p = parser("group(nan)");
     auto attr = p->attribute();
     EXPECT_FALSE(attr.matched);
     EXPECT_TRUE(attr.errored);
     EXPECT_EQ(attr.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:7: expected signed integer literal for group attribute");
 }

 }  // namespace
 }  // namespace tint::reader::wgsl
	// 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/tint/reader/wgsl/parser_impl_test_helper.h"

	namespace tint::reader::wgsl {
	namespace {

	TEST_F(ParserImplTest, Attribute_Location) {
	auto p = parser("location(4)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::LocationAttribute>());

	auto* loc = var_attr->As<ast::LocationAttribute>();
	EXPECT_EQ(loc->value, 4u);
	}

	TEST_F(ParserImplTest, Attribute_Location_MissingLeftParen) {
	auto p = parser("location 4)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:10: expected '(' for location attribute");
	}

	TEST_F(ParserImplTest, Attribute_Location_MissingRightParen) {
	auto p = parser("location(4");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:11: expected ')' for location attribute");
	}

	TEST_F(ParserImplTest, Attribute_Location_MissingValue) {
	auto p = parser("location()");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:10: expected signed integer literal for location attribute");
	}

	TEST_F(ParserImplTest, Attribute_Location_MissingInvalid) {
	auto p = parser("location(nan)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:10: expected signed integer literal for location attribute");
	}

	struct BuiltinData {
	const char* input;
	ast::Builtin result;
	};
	inline std::ostream& operator<<(std::ostream& out, BuiltinData data) {
	out << std::string(data.input);
	return out;
	}

	class BuiltinTest : public ParserImplTestWithParam<BuiltinData> {};

	TEST_P(BuiltinTest, Attribute_Builtin) {
	auto params = GetParam();
	auto p = parser(std::string("builtin(") + params.input + ")");

	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_TRUE(var_attr->Is<ast::BuiltinAttribute>());

	auto* builtin = var_attr->As<ast::BuiltinAttribute>();
	EXPECT_EQ(builtin->builtin, params.result);
	}
	INSTANTIATE_TEST_SUITE_P(
	ParserImplTest,
	BuiltinTest,
	testing::Values(BuiltinData{"position", ast::Builtin::kPosition},
	BuiltinData{"vertex_index", ast::Builtin::kVertexIndex},
	BuiltinData{"instance_index", ast::Builtin::kInstanceIndex},
	BuiltinData{"front_facing", ast::Builtin::kFrontFacing},
	BuiltinData{"frag_depth", ast::Builtin::kFragDepth},
	BuiltinData{"local_invocation_id", ast::Builtin::kLocalInvocationId},
	BuiltinData{"local_invocation_idx", ast::Builtin::kLocalInvocationIndex},
	BuiltinData{"local_invocation_index", ast::Builtin::kLocalInvocationIndex},
	BuiltinData{"global_invocation_id", ast::Builtin::kGlobalInvocationId},
	BuiltinData{"workgroup_id", ast::Builtin::kWorkgroupId},
	BuiltinData{"num_workgroups", ast::Builtin::kNumWorkgroups},
	BuiltinData{"sample_index", ast::Builtin::kSampleIndex},
	BuiltinData{"sample_mask", ast::Builtin::kSampleMask}));

	TEST_F(ParserImplTest, Attribute_Builtin_MissingLeftParen) {
	auto p = parser("builtin position)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected '(' for builtin attribute");
	}

	TEST_F(ParserImplTest, Attribute_Builtin_MissingRightParen) {
	auto p = parser("builtin(position");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:17: expected ')' for builtin attribute");
	}

	TEST_F(ParserImplTest, Attribute_Builtin_MissingValue) {
	auto p = parser("builtin()");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected identifier for builtin");
	}

	TEST_F(ParserImplTest, Attribute_Builtin_InvalidValue) {
	auto p = parser("builtin(other_thingy)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: invalid value for builtin attribute");
	}

	TEST_F(ParserImplTest, Attribute_Builtin_MissingInvalid) {
	auto p = parser("builtin(3)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected identifier for builtin");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_Flat) {
	auto p = parser("interpolate(flat)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

	auto* interp = var_attr->As<ast::InterpolateAttribute>();
	EXPECT_EQ(interp->type, ast::InterpolationType::kFlat);
	EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kNone);
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_Perspective_Center) {
	auto p = parser("interpolate(perspective, center)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

	auto* interp = var_attr->As<ast::InterpolateAttribute>();
	EXPECT_EQ(interp->type, ast::InterpolationType::kPerspective);
	EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kCenter);
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_Perspective_Centroid) {
	auto p = parser("interpolate(perspective, centroid)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

	auto* interp = var_attr->As<ast::InterpolateAttribute>();
	EXPECT_EQ(interp->type, ast::InterpolationType::kPerspective);
	EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kCentroid);
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_Linear_Sample) {
	auto p = parser("interpolate(linear, sample)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::InterpolateAttribute>());

	auto* interp = var_attr->As<ast::InterpolateAttribute>();
	EXPECT_EQ(interp->type, ast::InterpolationType::kLinear);
	EXPECT_EQ(interp->sampling, ast::InterpolationSampling::kSample);
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_MissingLeftParen) {
	auto p = parser("interpolate flat)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:13: expected '(' for interpolate attribute");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_MissingRightParen) {
	auto p = parser("interpolate(flat");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:17: expected ')' for interpolate attribute");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_MissingFirstValue) {
	auto p = parser("interpolate()");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:13: invalid interpolation type");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_InvalidFirstValue) {
	auto p = parser("interpolate(other_thingy)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:13: invalid interpolation type");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_MissingSecondValue) {
	auto p = parser("interpolate(perspective,)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:25: invalid interpolation sampling");
	}

	TEST_F(ParserImplTest, Attribute_Interpolate_InvalidSecondValue) {
	auto p = parser("interpolate(perspective, nope)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:26: invalid interpolation sampling");
	}

	TEST_F(ParserImplTest, Attribute_Binding) {
	auto p = parser("binding(4)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_NE(var_attr, nullptr);
	ASSERT_FALSE(p->has_error());
	ASSERT_TRUE(var_attr->Is<ast::BindingAttribute>());

	auto* binding = var_attr->As<ast::BindingAttribute>();
	EXPECT_EQ(binding->value, 4u);
	}

	TEST_F(ParserImplTest, Attribute_Binding_MissingLeftParen) {
	auto p = parser("binding 4)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected '(' for binding attribute");
	}

	TEST_F(ParserImplTest, Attribute_Binding_MissingRightParen) {
	auto p = parser("binding(4");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:10: expected ')' for binding attribute");
	}

	TEST_F(ParserImplTest, Attribute_Binding_MissingValue) {
	auto p = parser("binding()");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected signed integer literal for binding attribute");
	}

	TEST_F(ParserImplTest, Attribute_Binding_MissingInvalid) {
	auto p = parser("binding(nan)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:9: expected signed integer literal for binding attribute");
	}

	TEST_F(ParserImplTest, Attribute_group) {
	auto p = parser("group(4)");
	auto attr = p->attribute();
	EXPECT_TRUE(attr.matched);
	EXPECT_FALSE(attr.errored);
	ASSERT_NE(attr.value, nullptr);
	auto* var_attr = attr.value->As<ast::Attribute>();
	ASSERT_FALSE(p->has_error());
	ASSERT_NE(var_attr, nullptr);
	ASSERT_TRUE(var_attr->Is<ast::GroupAttribute>());

	auto* group = var_attr->As<ast::GroupAttribute>();
	EXPECT_EQ(group->value, 4u);
	}

	TEST_F(ParserImplTest, Attribute_Group_MissingLeftParen) {
	auto p = parser("group 2)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:7: expected '(' for group attribute");
	}

	TEST_F(ParserImplTest, Attribute_Group_MissingRightParen) {
	auto p = parser("group(2");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:8: expected ')' for group attribute");
	}

	TEST_F(ParserImplTest, Attribute_Group_MissingValue) {
	auto p = parser("group()");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:7: expected signed integer literal for group attribute");
	}

	TEST_F(ParserImplTest, Attribute_Group_MissingInvalid) {
	auto p = parser("group(nan)");
	auto attr = p->attribute();
	EXPECT_FALSE(attr.matched);
	EXPECT_TRUE(attr.errored);
	EXPECT_EQ(attr.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:7: expected signed integer literal for group attribute");
	}

	} // namespace
	} // namespace tint::reader::wgsl