| // 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/reader/wgsl/parser_impl_test_helper.h" |
| |
| namespace tint::reader::wgsl { |
| namespace { |
| |
| TEST_F(ParserImplTest, Empty) { |
| auto p = parser(""); |
| ASSERT_TRUE(p->Parse()) << p->error(); |
| } |
| |
| TEST_F(ParserImplTest, Parses) { |
| auto p = parser(R"( |
| @fragment |
| fn main() -> @location(0) vec4<f32> { |
| return vec4<f32>(.4, .2, .3, 1); |
| } |
| )"); |
| ASSERT_TRUE(p->Parse()) << p->error(); |
| |
| Program program = p->program(); |
| ASSERT_EQ(1u, program.AST().Functions().Length()); |
| } |
| |
| TEST_F(ParserImplTest, Parses_ExtraSemicolons) { |
| auto p = parser(R"( |
| ; |
| struct S { |
| a : f32, |
| };; |
| ; |
| fn foo() -> S { |
| ; |
| return S();;; |
| ; |
| };; |
| ; |
| )"); |
| ASSERT_TRUE(p->Parse()) << p->error(); |
| |
| Program program = p->program(); |
| ASSERT_EQ(1u, program.AST().Functions().Length()); |
| ASSERT_EQ(1u, program.AST().TypeDecls().Length()); |
| } |
| |
| TEST_F(ParserImplTest, HandlesError) { |
| auto p = parser(R"( |
| fn main() -> { // missing return type |
| return; |
| })"); |
| |
| ASSERT_FALSE(p->Parse()); |
| ASSERT_TRUE(p->has_error()); |
| EXPECT_EQ(p->error(), "2:15: unable to determine function return type"); |
| } |
| |
| TEST_F(ParserImplTest, HandlesUnexpectedToken) { |
| auto p = parser(R"( |
| fn main() { |
| } |
| foobar |
| )"); |
| |
| ASSERT_FALSE(p->Parse()); |
| ASSERT_TRUE(p->has_error()); |
| EXPECT_EQ(p->error(), "4:1: unexpected token"); |
| } |
| |
| TEST_F(ParserImplTest, HandlesBadToken_InMiddle) { |
| auto p = parser(R"( |
| fn main() { |
| let f = 0x1p10000000000000000000; // Exponent too big for hex float |
| return; |
| })"); |
| |
| ASSERT_FALSE(p->Parse()); |
| ASSERT_TRUE(p->has_error()); |
| EXPECT_EQ(p->error(), "3:11: exponent is too large for hex float"); |
| } |
| |
| TEST_F(ParserImplTest, HandlesBadToken_AtModuleScope) { |
| auto p = parser(R"( |
| fn main() { |
| return; |
| } |
| 0x1p10000000000000000000 |
| )"); |
| |
| ASSERT_FALSE(p->Parse()); |
| ASSERT_TRUE(p->has_error()); |
| EXPECT_EQ(p->error(), "5:1: exponent is too large for hex float"); |
| } |
| |
| TEST_F(ParserImplTest, Comments_TerminatedBlockComment) { |
| auto p = parser(R"( |
| /** |
| * Here is my shader. |
| * |
| * /* I can nest /**/ comments. */ |
| * // I can nest line comments too. |
| **/ |
| @fragment // This is the stage |
| fn main(/* |
| no |
| parameters |
| */) -> @location(0) vec4<f32> { |
| return/*block_comments_delimit_tokens*/vec4<f32>(.4, .2, .3, 1); |
| }/* block comments are OK at EOF...*/)"); |
| |
| ASSERT_TRUE(p->Parse()) << p->error(); |
| ASSERT_EQ(1u, p->program().AST().Functions().Length()); |
| } |
| |
| TEST_F(ParserImplTest, Comments_UnterminatedBlockComment) { |
| auto p = parser(R"( |
| @fragment |
| fn main() -> @location(0) vec4<f32> { |
| return vec4<f32>(.4, .2, .3, 1); |
| } /* unterminated block comments are invalid ...)"); |
| |
| ASSERT_FALSE(p->Parse()); |
| ASSERT_TRUE(p->has_error()); |
| EXPECT_EQ(p->error(), "5:3: unterminated block comment") << p->error(); |
| } |
| |
| TEST_F(ParserImplTest, Peek) { |
| auto p = parser("a == if"); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIdentifier)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kEqualEqual, 1)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIf, 2)); |
| } |
| |
| TEST_F(ParserImplTest, Peek_Placeholder) { |
| auto p = parser(">> if"); |
| EXPECT_TRUE(p->peek_is(Token::Type::kShiftRight)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIf, 1)); |
| } |
| |
| TEST_F(ParserImplTest, Peek_PastPlaceholder) { |
| auto p = parser(">= vec2<u32>"); |
| auto& n = p->next(); |
| ASSERT_TRUE(n.Is(Token::Type::kGreaterThanEqual)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIdentifier)) |
| << "expected: vec2 got: " << p->peek().to_name(); |
| EXPECT_TRUE(p->peek_is(Token::Type::kTemplateArgsLeft, 1)) |
| << "expected: < got: " << p->peek(1).to_name(); |
| } |
| |
| TEST_F(ParserImplTest, Peek_MultiplePlaceholder) { |
| auto p = parser(">= >= vec2<u32>"); |
| auto& n = p->next(); |
| ASSERT_TRUE(n.Is(Token::Type::kGreaterThanEqual)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kGreaterThanEqual)) |
| << "expected: >= got: " << p->peek().to_name(); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIdentifier, 1)) |
| << "expected: vec2 got: " << p->peek(1).to_name(); |
| EXPECT_TRUE(p->peek_is(Token::Type::kTemplateArgsLeft, 2)) |
| << "expected: < got: " << p->peek(2).to_name(); |
| } |
| |
| TEST_F(ParserImplTest, Peek_PastEnd) { |
| auto p = parser(">"); |
| EXPECT_TRUE(p->peek_is(Token::Type::kGreaterThan)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kEOF, 1)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kEOF, 2)); |
| } |
| |
| TEST_F(ParserImplTest, Peek_PastEnd_WalkingPlaceholders) { |
| auto p = parser(">= >="); |
| auto& n = p->next(); |
| ASSERT_TRUE(n.Is(Token::Type::kGreaterThanEqual)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kGreaterThanEqual)) |
| << "expected: <= got: " << p->peek().to_name(); |
| EXPECT_TRUE(p->peek_is(Token::Type::kEOF, 1)) << "expected: EOF got: " << p->peek(1).to_name(); |
| } |
| |
| TEST_F(ParserImplTest, Peek_AfterSplit) { |
| auto p = parser(">= vec2<u32>"); |
| auto& n = p->next(); |
| ASSERT_TRUE(n.Is(Token::Type::kGreaterThanEqual)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kIdentifier)) |
| << "expected: vec2 got: " << p->peek().to_name(); |
| |
| p->split_token(Token::Type::kGreaterThan, Token::Type::kEqual); |
| ASSERT_TRUE(n.Is(Token::Type::kGreaterThan)); |
| EXPECT_TRUE(p->peek_is(Token::Type::kEqual)) << "expected: = got: " << p->peek().to_name(); |
| } |
| |
| } // namespace |
| } // namespace tint::reader::wgsl |