| // Copyright 2022 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, MathExpression_Parses_Multiplicative) { |
| auto p = parser("a * b"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_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::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(ParserImplTest, MathExpression_Parses_Mixed_MultiplicativeStart) { |
| auto p = parser("a * b + c"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_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 |
| // op: + |
| // rhs: c |
| auto* rel = e->As<ast::BinaryExpression>(); |
| EXPECT_EQ(ast::BinaryOp::kAdd, 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("c")); |
| |
| ASSERT_TRUE(rel->lhs->Is<ast::BinaryExpression>()); |
| // lhs: a |
| // op: * |
| // rhs: b |
| rel = rel->lhs->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("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, MathExpression_Parses_Additive) { |
| auto p = parser("a + b"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_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::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, MathExpression_Parses_Mixed_AdditiveStart) { |
| auto p = parser("a + b * c"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_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 |
| // op: + |
| // rhs: b * c |
| 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::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, MathExpression_NoMatch_ReturnLHS) { |
| auto p = parser("a if"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_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); |
| } |
| |
| TEST_F(ParserImplTest, MathExpression_InvalidRHS) { |
| auto p = parser("a * if"); |
| auto lhs = p->unary_expression(); |
| auto e = p->expect_math_expression_post_unary_expression(lhs.value); |
| EXPECT_TRUE(e.errored); |
| EXPECT_TRUE(p->has_error()); |
| ASSERT_EQ(e.value, nullptr); |
| EXPECT_EQ("1:5: unable to parse right side of * expression", p->error()); |
| } |
| |
| } // namespace |
| } // namespace tint::reader::wgsl |