src/tint/lang/wgsl/reader/parser/bitwise_expression_test.cc - dawn - Git at Google

 // Copyright 2022 The Dawn & Tint Authors
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 // 1. Redistributions of source code must retain the above copyright notice, this
 //    list of conditions and the following disclaimer.
 //
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 //    this list of conditions and the following disclaimer in the documentation
 //    and/or other materials provided with the distribution.
 //
 // 3. Neither the name of the copyright holder nor the names of its
 //    contributors may be used to endorse or promote products derived from
 //    this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include "src/tint/lang/wgsl/reader/parser/helper_test.h"

 namespace tint::wgsl::reader {
 namespace {

 TEST_F(WGSLParserTest, BitwiseExpr_NoOp) {
     auto p = parser("a true");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_FALSE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_EQ(e.value, nullptr);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Or_Parses) {
     auto p = parser("a | true");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     EXPECT_EQ(e->source.range.begin.line, 1u);
     EXPECT_EQ(e->source.range.begin.column, 1u);
     EXPECT_EQ(e->source.range.end.line, 1u);
     EXPECT_EQ(e->source.range.end.column, 9u);

     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kOr, rel->op);

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Or_Parses_Multiple) {
     auto p = parser("a | true | b");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     // lhs: (a | true)
     // rhs: b

     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kOr, rel->op);

     ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));

     ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

     // lhs: a
     // rhs: true
     rel = rel->lhs->As<ast::BinaryExpression>();

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Or_InvalidRHS) {
     auto p = parser("true | if (a) {}");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_FALSE(e.matched);
     EXPECT_TRUE(e.errored);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:8: unable to parse right side of | expression");
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Xor_Parses) {
     auto p = parser("a ^ true");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     EXPECT_EQ(e->source.range.begin.line, 1u);
     EXPECT_EQ(e->source.range.begin.column, 1u);
     EXPECT_EQ(e->source.range.end.line, 1u);
     EXPECT_EQ(e->source.range.end.column, 9u);

     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kXor, rel->op);

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Xor_Parses_Multiple) {
     auto p = parser("a ^ true ^ b");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     // lhs: (a ^ true)
     // rhs: b
     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kXor, rel->op);

     ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));

     ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

     // lhs: a
     // rhs: true
     rel = rel->lhs->As<ast::BinaryExpression>();

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_Xor_InvalidRHS) {
     auto p = parser("true ^ if (a) {}");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_FALSE(e.matched);
     EXPECT_TRUE(e.errored);
     EXPECT_EQ(e.value, nullptr);
     ASSERT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:8: unable to parse right side of ^ expression");
 }

 TEST_F(WGSLParserTest, BitwiseExpr_And_Parses) {
     auto p = parser("a & true");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     EXPECT_EQ(e->source.range.begin.line, 1u);
     EXPECT_EQ(e->source.range.begin.column, 1u);
     EXPECT_EQ(e->source.range.end.line, 1u);
     EXPECT_EQ(e->source.range.end.column, 9u);

     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_And_Parses_Multiple) {
     auto p = parser("a & true & b");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     // lhs: (a & true)
     // rhs: b
     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

     ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
     auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("b"));

     ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

     // lhs: a
     // rhs: true
     rel = rel->lhs->As<ast::BinaryExpression>();

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     ident_expr = rel->lhs->As<ast::IdentifierExpression>();
     EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("a"));

     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
     ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
 }

 TEST_F(WGSLParserTest, BitwiseExpr_And_Parses_AndAnd) {
     auto p = parser("a & true &&b");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     // bitwise_expression_post_unary_expression returns before parsing '&&'

     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     EXPECT_FALSE(p->has_error()) << p->error();
     ASSERT_NE(e.value, nullptr);

     // lhs: a
     // rhs: true
     ASSERT_TRUE(e->Is<ast::BinaryExpression>());
     auto* rel = e->As<ast::BinaryExpression>();
     EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

     ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
     ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
 }

 TEST_F(WGSLParserTest, BitwiseExpr_And_InvalidRHS) {
     auto p = parser("true & if (a) {}");
     auto lhs = p->unary_expression();
     auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
     EXPECT_FALSE(e.matched);
     EXPECT_TRUE(e.errored);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_TRUE(p->has_error());
     EXPECT_EQ(p->error(), "1:8: unable to parse right side of & expression");
 }

 }  // namespace
 }  // namespace tint::wgsl::reader
	// Copyright 2022 The Dawn & Tint Authors
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// 1. Redistributions of source code must retain the above copyright notice, this
	// list of conditions and the following disclaimer.
	//
	// 2. Redistributions in binary form must reproduce the above copyright notice,
	// this list of conditions and the following disclaimer in the documentation
	// and/or other materials provided with the distribution.
	//
	// 3. Neither the name of the copyright holder nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include "src/tint/lang/wgsl/reader/parser/helper_test.h"

	namespace tint::wgsl::reader {
	namespace {

	TEST_F(WGSLParserTest, BitwiseExpr_NoOp) {
	auto p = parser("a true");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_FALSE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_EQ(e.value, nullptr);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Or_Parses) {
	auto p = parser("a \| true");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	EXPECT_EQ(e->source.range.begin.line, 1u);
	EXPECT_EQ(e->source.range.begin.column, 1u);
	EXPECT_EQ(e->source.range.end.line, 1u);
	EXPECT_EQ(e->source.range.end.column, 9u);

	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kOr, rel->op);

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Or_Parses_Multiple) {
	auto p = parser("a \| true \| b");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	// lhs: (a \| true)
	// rhs: b

	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kOr, rel->op);

	ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));

	ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

	// lhs: a
	// rhs: true
	rel = rel->lhs->As<ast::BinaryExpression>();

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Or_InvalidRHS) {
	auto p = parser("true \| if (a) {}");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_FALSE(e.matched);
	EXPECT_TRUE(e.errored);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:8: unable to parse right side of \| expression");
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Xor_Parses) {
	auto p = parser("a ^ true");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	EXPECT_EQ(e->source.range.begin.line, 1u);
	EXPECT_EQ(e->source.range.begin.column, 1u);
	EXPECT_EQ(e->source.range.end.line, 1u);
	EXPECT_EQ(e->source.range.end.column, 9u);

	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kXor, rel->op);

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Xor_Parses_Multiple) {
	auto p = parser("a ^ true ^ b");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	// lhs: (a ^ true)
	// rhs: b
	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kXor, rel->op);

	ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));

	ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

	// lhs: a
	// rhs: true
	rel = rel->lhs->As<ast::BinaryExpression>();

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_Xor_InvalidRHS) {
	auto p = parser("true ^ if (a) {}");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_FALSE(e.matched);
	EXPECT_TRUE(e.errored);
	EXPECT_EQ(e.value, nullptr);
	ASSERT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:8: unable to parse right side of ^ expression");
	}

	TEST_F(WGSLParserTest, BitwiseExpr_And_Parses) {
	auto p = parser("a & true");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	EXPECT_EQ(e->source.range.begin.line, 1u);
	EXPECT_EQ(e->source.range.begin.column, 1u);
	EXPECT_EQ(e->source.range.end.line, 1u);
	EXPECT_EQ(e->source.range.end.column, 9u);

	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_And_Parses_Multiple) {
	auto p = parser("a & true & b");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	// lhs: (a & true)
	// rhs: b
	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

	ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
	auto* ident_expr = rel->rhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("b"));

	ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());

	// lhs: a
	// rhs: true
	rel = rel->lhs->As<ast::BinaryExpression>();

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	ident_expr = rel->lhs->As<ast::IdentifierExpression>();
	EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Register("a"));

	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	ASSERT_TRUE(rel->rhs->As<ast::BoolLiteralExpression>()->value);
	}

	TEST_F(WGSLParserTest, BitwiseExpr_And_Parses_AndAnd) {
	auto p = parser("a & true &&b");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	// bitwise_expression_post_unary_expression returns before parsing '&&'

	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	EXPECT_FALSE(p->has_error()) << p->error();
	ASSERT_NE(e.value, nullptr);

	// lhs: a
	// rhs: true
	ASSERT_TRUE(e->Is<ast::BinaryExpression>());
	auto* rel = e->As<ast::BinaryExpression>();
	EXPECT_EQ(core::BinaryOp::kAnd, rel->op);

	ASSERT_TRUE(rel->lhs->Is<ast::IdentifierExpression>());
	ASSERT_TRUE(rel->rhs->Is<ast::BoolLiteralExpression>());
	}

	TEST_F(WGSLParserTest, BitwiseExpr_And_InvalidRHS) {
	auto p = parser("true & if (a) {}");
	auto lhs = p->unary_expression();
	auto e = p->bitwise_expression_post_unary_expression(lhs.value, lhs->source);
	EXPECT_FALSE(e.matched);
	EXPECT_TRUE(e.errored);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_TRUE(p->has_error());
	EXPECT_EQ(p->error(), "1:8: unable to parse right side of & expression");
	}

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