src/tint/lang/wgsl/reader/parser/statement_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/lang/wgsl/ast/break_statement.h"
 #include "src/tint/lang/wgsl/ast/continue_statement.h"
 #include "src/tint/lang/wgsl/ast/discard_statement.h"
 #include "src/tint/lang/wgsl/reader/parser/helper_test.h"

 namespace tint::wgsl::reader {
 namespace {

 TEST_F(WGSLParserTest, Statement) {
     auto p = parser("return;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::ReturnStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Semicolon) {
     auto p = parser(";");
     p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
 }

 TEST_F(WGSLParserTest, Statement_Return_NoValue) {
     auto p = parser("return;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::ReturnStatement>());
     auto* ret = e->As<ast::ReturnStatement>();
     ASSERT_EQ(ret->value, nullptr);
 }

 TEST_F(WGSLParserTest, Statement_Return_Value) {
     auto p = parser("return a + b * (.1 - .2);");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();

     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::ReturnStatement>());
     auto* ret = e->As<ast::ReturnStatement>();
     ASSERT_NE(ret->value, nullptr);
     EXPECT_TRUE(ret->value->Is<ast::BinaryExpression>());
 }

 TEST_F(WGSLParserTest, Statement_Return_MissingSemi) {
     auto p = parser("return");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:7: expected ';' for return statement");
 }

 TEST_F(WGSLParserTest, Statement_Return_Invalid) {
     auto p = parser("return if(a) {};");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:8: expected ';' for return statement");
 }

 TEST_F(WGSLParserTest, Statement_If) {
     auto p = parser("if (a) {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::IfStatement>());
 }

 TEST_F(WGSLParserTest, Statement_If_Invalid) {
     auto p = parser("if (a) { fn main() -> {}}");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:10: expected '}' for if statement");
 }

 TEST_F(WGSLParserTest, Statement_Variable) {
     auto p = parser("var a : i32 = 1;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::VariableDeclStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Variable_Invalid) {
     auto p = parser("var a : i32 =;");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:14: missing initializer for 'var' declaration");
 }

 TEST_F(WGSLParserTest, Statement_Variable_MissingSemicolon) {
     auto p = parser("var a : i32");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:12: expected ';' for variable declaration");
 }

 TEST_F(WGSLParserTest, Statement_Switch) {
     auto p = parser("switch (a) {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::SwitchStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Switch_Invalid) {
     auto p = parser("switch (a) { case: {}}");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:18: expected case selector expression or `default`");
 }

 TEST_F(WGSLParserTest, Statement_Loop) {
     auto p = parser("loop {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::LoopStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Loop_Invalid) {
     auto p = parser("loop discard; }");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:6: expected '{' for loop");
 }

 TEST_F(WGSLParserTest, Statement_Assignment) {
     auto p = parser("a = b;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Assignment_Invalid) {
     auto p = parser("a = if(b) {};");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:5: unable to parse right side of assignment");
 }

 TEST_F(WGSLParserTest, Statement_Assignment_MissingSemicolon) {
     auto p = parser("a = b");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:6: expected ';' for assignment statement");
 }

 TEST_F(WGSLParserTest, Statement_Break) {
     auto p = parser("break;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::BreakStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Break_MissingSemicolon) {
     auto p = parser("break");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:6: expected ';' for break statement");
 }

 TEST_F(WGSLParserTest, Statement_Continue) {
     auto p = parser("continue;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::ContinueStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Continue_MissingSemicolon) {
     auto p = parser("continue");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:9: expected ';' for continue statement");
 }

 TEST_F(WGSLParserTest, Statement_Discard) {
     auto p = parser("discard;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::DiscardStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Discard_MissingSemicolon) {
     auto p = parser("discard");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(e.value, nullptr);
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(p->error(), "1:8: expected ';' for discard statement");
 }

 TEST_F(WGSLParserTest, Statement_Body) {
     auto p = parser("{ var i: i32; }");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_TRUE(e->Is<ast::BlockStatement>());
     EXPECT_TRUE(e->As<ast::BlockStatement>()->statements[0]->Is<ast::VariableDeclStatement>());
 }

 TEST_F(WGSLParserTest, Statement_Body_Invalid) {
     auto p = parser("{ fn main() -> {}}");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:3: expected '}' for block statement");
 }

 TEST_F(WGSLParserTest, Statement_ConstAssert_WithParen) {
     auto p = parser("const_assert(true);");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* sa = As<ast::ConstAssert>(e.value);
     ASSERT_NE(sa, nullptr);
     EXPECT_EQ(sa->source.range.begin.line, 1u);
     EXPECT_EQ(sa->source.range.begin.column, 1u);
     EXPECT_EQ(sa->source.range.end.line, 1u);
     EXPECT_EQ(sa->source.range.end.column, 19u);

     EXPECT_TRUE(sa->condition->Is<ast::BoolLiteralExpression>());
     EXPECT_EQ(sa->condition->source.range.begin.line, 1u);
     EXPECT_EQ(sa->condition->source.range.begin.column, 14u);
     EXPECT_EQ(sa->condition->source.range.end.line, 1u);
     EXPECT_EQ(sa->condition->source.range.end.column, 18u);
 }

 TEST_F(WGSLParserTest, Statement_ConstAssert_WithoutParen) {
     auto p = parser("const_assert  true;");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* sa = As<ast::ConstAssert>(e.value);
     ASSERT_NE(sa, nullptr);
     EXPECT_EQ(sa->source.range.begin.line, 1u);
     EXPECT_EQ(sa->source.range.begin.column, 1u);
     EXPECT_EQ(sa->source.range.end.line, 1u);
     EXPECT_EQ(sa->source.range.end.column, 19u);

     EXPECT_TRUE(sa->condition->Is<ast::BoolLiteralExpression>());
     EXPECT_EQ(sa->condition->source.range.begin.line, 1u);
     EXPECT_EQ(sa->condition->source.range.begin.column, 15u);
     EXPECT_EQ(sa->condition->source.range.end.line, 1u);
     EXPECT_EQ(sa->condition->source.range.end.column, 19u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Block) {
     auto p = parser("@diagnostic(off, derivative_uniformity) {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::BlockStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_For) {
     auto p = parser("@diagnostic(off, derivative_uniformity) for (;false;) {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::ForLoopStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_If) {
     auto p = parser("@diagnostic(off, derivative_uniformity) if true {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::IfStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Loop) {
     auto p = parser("@diagnostic(off, derivative_uniformity) loop {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::LoopStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Switch) {
     auto p = parser("@diagnostic(off, derivative_uniformity) switch (0) { default{} }");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::SwitchStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_ConsumedAttributes_While) {
     auto p = parser("@diagnostic(off, derivative_uniformity) while (false) {}");
     auto e = p->statement();
     ASSERT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);

     auto* s = As<ast::WhileStatement>(e.value);
     ASSERT_NE(s, nullptr);
     EXPECT_EQ(s->attributes.Length(), 1u);
 }

 TEST_F(WGSLParserTest, Statement_UnexpectedAttributes) {
     auto p = parser("@diagnostic(off, derivative_uniformity) return;");
     auto e = p->statement();
     EXPECT_TRUE(p->has_error());
     EXPECT_FALSE(e.errored);
     EXPECT_TRUE(e.matched);
     EXPECT_NE(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:2: unexpected attributes");
 }

 }  // namespace
 }  // namespace tint::wgsl::reader
	// 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/lang/wgsl/ast/break_statement.h"
	#include "src/tint/lang/wgsl/ast/continue_statement.h"
	#include "src/tint/lang/wgsl/ast/discard_statement.h"
	#include "src/tint/lang/wgsl/reader/parser/helper_test.h"

	namespace tint::wgsl::reader {
	namespace {

	TEST_F(WGSLParserTest, Statement) {
	auto p = parser("return;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::ReturnStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Semicolon) {
	auto p = parser(";");
	p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	}

	TEST_F(WGSLParserTest, Statement_Return_NoValue) {
	auto p = parser("return;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::ReturnStatement>());
	auto* ret = e->As<ast::ReturnStatement>();
	ASSERT_EQ(ret->value, nullptr);
	}

	TEST_F(WGSLParserTest, Statement_Return_Value) {
	auto p = parser("return a + b * (.1 - .2);");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();

	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::ReturnStatement>());
	auto* ret = e->As<ast::ReturnStatement>();
	ASSERT_NE(ret->value, nullptr);
	EXPECT_TRUE(ret->value->Is<ast::BinaryExpression>());
	}

	TEST_F(WGSLParserTest, Statement_Return_MissingSemi) {
	auto p = parser("return");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:7: expected ';' for return statement");
	}

	TEST_F(WGSLParserTest, Statement_Return_Invalid) {
	auto p = parser("return if(a) {};");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:8: expected ';' for return statement");
	}

	TEST_F(WGSLParserTest, Statement_If) {
	auto p = parser("if (a) {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::IfStatement>());
	}

	TEST_F(WGSLParserTest, Statement_If_Invalid) {
	auto p = parser("if (a) { fn main() -> {}}");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:10: expected '}' for if statement");
	}

	TEST_F(WGSLParserTest, Statement_Variable) {
	auto p = parser("var a : i32 = 1;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::VariableDeclStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Variable_Invalid) {
	auto p = parser("var a : i32 =;");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:14: missing initializer for 'var' declaration");
	}

	TEST_F(WGSLParserTest, Statement_Variable_MissingSemicolon) {
	auto p = parser("var a : i32");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:12: expected ';' for variable declaration");
	}

	TEST_F(WGSLParserTest, Statement_Switch) {
	auto p = parser("switch (a) {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::SwitchStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Switch_Invalid) {
	auto p = parser("switch (a) { case: {}}");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:18: expected case selector expression or `default`");
	}

	TEST_F(WGSLParserTest, Statement_Loop) {
	auto p = parser("loop {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::LoopStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Loop_Invalid) {
	auto p = parser("loop discard; }");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:6: expected '{' for loop");
	}

	TEST_F(WGSLParserTest, Statement_Assignment) {
	auto p = parser("a = b;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Assignment_Invalid) {
	auto p = parser("a = if(b) {};");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:5: unable to parse right side of assignment");
	}

	TEST_F(WGSLParserTest, Statement_Assignment_MissingSemicolon) {
	auto p = parser("a = b");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:6: expected ';' for assignment statement");
	}

	TEST_F(WGSLParserTest, Statement_Break) {
	auto p = parser("break;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::BreakStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Break_MissingSemicolon) {
	auto p = parser("break");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:6: expected ';' for break statement");
	}

	TEST_F(WGSLParserTest, Statement_Continue) {
	auto p = parser("continue;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::ContinueStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Continue_MissingSemicolon) {
	auto p = parser("continue");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:9: expected ';' for continue statement");
	}

	TEST_F(WGSLParserTest, Statement_Discard) {
	auto p = parser("discard;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::DiscardStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Discard_MissingSemicolon) {
	auto p = parser("discard");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(e.value, nullptr);
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(p->error(), "1:8: expected ';' for discard statement");
	}

	TEST_F(WGSLParserTest, Statement_Body) {
	auto p = parser("{ var i: i32; }");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_TRUE(e->Is<ast::BlockStatement>());
	EXPECT_TRUE(e->As<ast::BlockStatement>()->statements[0]->Is<ast::VariableDeclStatement>());
	}

	TEST_F(WGSLParserTest, Statement_Body_Invalid) {
	auto p = parser("{ fn main() -> {}}");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:3: expected '}' for block statement");
	}

	TEST_F(WGSLParserTest, Statement_ConstAssert_WithParen) {
	auto p = parser("const_assert(true);");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* sa = As<ast::ConstAssert>(e.value);
	ASSERT_NE(sa, nullptr);
	EXPECT_EQ(sa->source.range.begin.line, 1u);
	EXPECT_EQ(sa->source.range.begin.column, 1u);
	EXPECT_EQ(sa->source.range.end.line, 1u);
	EXPECT_EQ(sa->source.range.end.column, 19u);

	EXPECT_TRUE(sa->condition->Is<ast::BoolLiteralExpression>());
	EXPECT_EQ(sa->condition->source.range.begin.line, 1u);
	EXPECT_EQ(sa->condition->source.range.begin.column, 14u);
	EXPECT_EQ(sa->condition->source.range.end.line, 1u);
	EXPECT_EQ(sa->condition->source.range.end.column, 18u);
	}

	TEST_F(WGSLParserTest, Statement_ConstAssert_WithoutParen) {
	auto p = parser("const_assert true;");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* sa = As<ast::ConstAssert>(e.value);
	ASSERT_NE(sa, nullptr);
	EXPECT_EQ(sa->source.range.begin.line, 1u);
	EXPECT_EQ(sa->source.range.begin.column, 1u);
	EXPECT_EQ(sa->source.range.end.line, 1u);
	EXPECT_EQ(sa->source.range.end.column, 19u);

	EXPECT_TRUE(sa->condition->Is<ast::BoolLiteralExpression>());
	EXPECT_EQ(sa->condition->source.range.begin.line, 1u);
	EXPECT_EQ(sa->condition->source.range.begin.column, 15u);
	EXPECT_EQ(sa->condition->source.range.end.line, 1u);
	EXPECT_EQ(sa->condition->source.range.end.column, 19u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Block) {
	auto p = parser("@diagnostic(off, derivative_uniformity) {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::BlockStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_For) {
	auto p = parser("@diagnostic(off, derivative_uniformity) for (;false;) {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::ForLoopStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_If) {
	auto p = parser("@diagnostic(off, derivative_uniformity) if true {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::IfStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Loop) {
	auto p = parser("@diagnostic(off, derivative_uniformity) loop {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::LoopStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_Switch) {
	auto p = parser("@diagnostic(off, derivative_uniformity) switch (0) { default{} }");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::SwitchStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_ConsumedAttributes_While) {
	auto p = parser("@diagnostic(off, derivative_uniformity) while (false) {}");
	auto e = p->statement();
	ASSERT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);

	auto* s = As<ast::WhileStatement>(e.value);
	ASSERT_NE(s, nullptr);
	EXPECT_EQ(s->attributes.Length(), 1u);
	}

	TEST_F(WGSLParserTest, Statement_UnexpectedAttributes) {
	auto p = parser("@diagnostic(off, derivative_uniformity) return;");
	auto e = p->statement();
	EXPECT_TRUE(p->has_error());
	EXPECT_FALSE(e.errored);
	EXPECT_TRUE(e.matched);
	EXPECT_NE(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:2: unexpected attributes");
	}

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