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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/lang/wgsl/reader/parser/helper_test.h"
namespace tint::wgsl::reader {
namespace {
TEST_F(WGSLParserTest, MultiplicativeExpression_Parses_Multiply) {
auto p = parser("a * b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kMultiply, 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::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, MultiplicativeExpression_Parses_Multiply_UnaryIndirect) {
auto p = parser("a **b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kMultiply, 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::UnaryOpExpression>());
auto* unary = rel->rhs->As<ast::UnaryOpExpression>();
EXPECT_EQ(core::UnaryOp::kIndirection, unary->op);
ASSERT_TRUE(unary->expr->Is<ast::IdentifierExpression>());
ident_expr = unary->expr->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, MultiplicativeExpression_Parses_Divide) {
auto p = parser("a / b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kDivide, 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::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, MultiplicativeExpression_Parses_Modulo) {
auto p = parser("a % b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kModulo, 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::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, MultiplicativeExpression_Parses_Grouping) {
auto p = parser("a * b / c % d * e");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
// lhs: ((a * b) / c) % d
// op: *
// rhs: e
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kMultiply, 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("e"));
ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());
// lhs: (a * b) / c
// op: %
// rhs: d
rel = rel->lhs->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kModulo, rel->op);
ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("d"));
ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());
// lhs: a * b
// op: /
// rhs: c
rel = rel->lhs->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kDivide, rel->op);
ASSERT_TRUE(rel->rhs->Is<ast::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("c"));
ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());
// lhs: a
// op: *
// rhs: b
rel = rel->lhs->As<ast::BinaryExpression>();
EXPECT_EQ(core::BinaryOp::kMultiply, rel->op);
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::IdentifierExpression>());
ident_expr = rel->rhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, MultiplicativeExpression_InvalidRHS) {
auto p = parser("a * if (a) {}");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
ASSERT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:5: unable to parse right side of * expression");
}
TEST_F(WGSLParserTest, MultiplicativeExpression_NoMatch_ReturnsLHS) {
auto p = parser("a + b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
EXPECT_EQ(lhs.value, e.value);
}
} // namespace
} // namespace tint::wgsl::reader