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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_impl_test_helper.h"
namespace tint::reader::wgsl {
namespace {
TEST_F(ParserImplTest, AdditiveExpression_Parses_Plus) {
auto p = parser("a + b");
auto lhs = p->unary_expression();
auto e = p->expect_additive_expression_post_unary_expression(lhs.value);
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, 3u);
EXPECT_EQ(e->source.range.end.line, 1u);
EXPECT_EQ(e->source.range.end.column, 4u);
ASSERT_TRUE(e->Is<ast::BinaryExpression>());
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(ast::BinaryOp::kAdd, 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(ParserImplTest, AdditiveExpression_Parses_Minus) {
auto p = parser("a - b");
auto lhs = p->unary_expression();
auto e = p->expect_additive_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(ast::BinaryOp::kSubtract, 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(ParserImplTest, AdditiveExpression_Parses_MinusMinus) {
auto p = parser("a--b");
auto lhs = p->unary_expression();
auto e = p->expect_additive_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(ast::BinaryOp::kSubtract, 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(ast::UnaryOp::kNegation, 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(ParserImplTest, AdditiveExpression_Parses_MultipleOps) {
auto p = parser("a - b + c - d");
auto lhs = p->unary_expression();
auto e = p->expect_additive_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
// op: -
// rhs: d
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(ast::BinaryOp::kSubtract, 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("d"));
ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());
// lhs: a - b
// op: +
// rhs: c
rel = rel->lhs->As<ast::BinaryExpression>();
EXPECT_EQ(ast::BinaryOp::kAdd, 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(ast::BinaryOp::kSubtract, 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(ParserImplTest, AdditiveExpression_Parses_MultipleOps_MixedMultiplication) {
auto p = parser("a - b * c - d");
auto lhs = p->unary_expression();
auto e = p->expect_additive_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)
// op: -
// rhs: d
auto* rel = e->As<ast::BinaryExpression>();
EXPECT_EQ(ast::BinaryOp::kSubtract, 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("d"));
ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>());
// lhs: a
// op: -
// rhs: b * c
rel = rel->lhs->As<ast::BinaryExpression>();
EXPECT_EQ(ast::BinaryOp::kSubtract, 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::BinaryExpression>());
// lhs: b
// op: *
// rhs: c
rel = rel->rhs->As<ast::BinaryExpression>();
EXPECT_EQ(ast::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("b"));
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"));
}
TEST_F(ParserImplTest, AdditiveExpression_InvalidRHS) {
auto p = parser("a + if (a) {}");
auto lhs = p->unary_expression();
auto e = p->expect_additive_expression_post_unary_expression(lhs.value);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:5: unable to parse right side of + expression");
}
TEST_F(ParserImplTest, AdditiveExpression_NoMatch_ReturnsLHS) {
auto p = parser("a true");
auto lhs = p->unary_expression();
auto e = p->expect_additive_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::reader::wgsl