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// 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/ast/unary_op_expression.h"
#include "src/tint/reader/wgsl/parser_impl_test_helper.h"
namespace tint::reader::wgsl {
namespace {
TEST_F(ParserImplTest, UnaryExpression_Postix) {
auto p = parser("a[2]");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::IndexAccessorExpression>());
auto* idx = e->As<ast::IndexAccessorExpression>();
ASSERT_TRUE(idx->object->Is<ast::IdentifierExpression>());
auto* ident = idx->object->As<ast::IdentifierExpression>();
EXPECT_EQ(ident->symbol, p->builder().Symbols().Get("a"));
ASSERT_TRUE(idx->index->Is<ast::IntLiteralExpression>());
ASSERT_EQ(idx->index->As<ast::IntLiteralExpression>()->value, 2);
ASSERT_EQ(idx->index->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
}
TEST_F(ParserImplTest, UnaryExpression_Minus) {
auto p = parser("- 1");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
ASSERT_EQ(u->op, ast::UnaryOp::kNegation);
ASSERT_TRUE(u->expr->Is<ast::IntLiteralExpression>());
EXPECT_EQ(u->expr->As<ast::IntLiteralExpression>()->value, 1);
ASSERT_EQ(u->expr->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
}
TEST_F(ParserImplTest, UnaryExpression_AddressOf) {
auto p = parser("&x");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
EXPECT_EQ(u->op, ast::UnaryOp::kAddressOf);
EXPECT_TRUE(u->expr->Is<ast::IdentifierExpression>());
}
TEST_F(ParserImplTest, UnaryExpression_Dereference) {
auto p = parser("*x");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
EXPECT_EQ(u->op, ast::UnaryOp::kIndirection);
EXPECT_TRUE(u->expr->Is<ast::IdentifierExpression>());
}
TEST_F(ParserImplTest, UnaryExpression_AddressOf_Precedence) {
auto p = parser("&x.y");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
EXPECT_EQ(u->op, ast::UnaryOp::kAddressOf);
EXPECT_TRUE(u->expr->Is<ast::MemberAccessorExpression>());
}
TEST_F(ParserImplTest, UnaryExpression_Dereference_Precedence) {
auto p = parser("*x.y");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
EXPECT_EQ(u->op, ast::UnaryOp::kIndirection);
EXPECT_TRUE(u->expr->Is<ast::MemberAccessorExpression>());
}
TEST_F(ParserImplTest, UnaryExpression_Minus_InvalidRHS) {
auto p = parser("-if(a) {}");
auto e = p->unary_expression();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:2: unable to parse right side of - expression");
}
TEST_F(ParserImplTest, UnaryExpression_Bang) {
auto p = parser("!1");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
ASSERT_EQ(u->op, ast::UnaryOp::kNot);
ASSERT_TRUE(u->expr->Is<ast::IntLiteralExpression>());
EXPECT_EQ(u->expr->As<ast::IntLiteralExpression>()->value, 1);
ASSERT_EQ(u->expr->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
}
TEST_F(ParserImplTest, UnaryExpression_Bang_InvalidRHS) {
auto p = parser("!if (a) {}");
auto e = p->unary_expression();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:2: unable to parse right side of ! expression");
}
TEST_F(ParserImplTest, UnaryExpression_Tilde) {
auto p = parser("~1");
auto e = p->unary_expression();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::UnaryOpExpression>());
auto* u = e->As<ast::UnaryOpExpression>();
ASSERT_EQ(u->op, ast::UnaryOp::kComplement);
ASSERT_TRUE(u->expr->Is<ast::IntLiteralExpression>());
EXPECT_EQ(u->expr->As<ast::IntLiteralExpression>()->value, 1);
ASSERT_EQ(u->expr->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
}
TEST_F(ParserImplTest, UnaryExpression_PrefixPlusPlus) {
auto p = parser("++a");
auto e = p->unary_expression();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(),
"1:1: prefix increment and decrement operators are reserved for a "
"future WGSL version");
}
TEST_F(ParserImplTest, UnaryExpression_PrefixMinusMinus) {
auto p = parser("--a");
auto e = p->unary_expression();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(),
"1:1: prefix increment and decrement operators are reserved for a "
"future WGSL version");
}
} // namespace
} // namespace tint::reader::wgsl