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// Copyright 2020 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,
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// 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, MultiplicativeExpression_Parses_Multiply) {
auto p = parser("a * b");
auto lhs = p->unary_expression();
auto e = p->expect_multiplicative_expression_post_unary_expression(lhs.value, lhs->source);
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, lhs->source);
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, lhs->source);
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, lhs->source);
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, lhs->source);
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, lhs->source);
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, lhs->source);
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