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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/reader/wgsl/parser_impl_test_helper.h"
namespace tint::reader::wgsl {
namespace {
TEST_F(ParserImplTest, FunctionHeader) {
auto p = parser("fn main(a : i32, b: f32)");
auto f = p->function_header();
ASSERT_FALSE(p->has_error()) << p->error();
EXPECT_TRUE(f.matched);
EXPECT_FALSE(f.errored);
EXPECT_EQ(f->name, "main");
ASSERT_EQ(f->params.size(), 2u);
EXPECT_EQ(f->params[0]->symbol, p->builder().Symbols().Get("a"));
EXPECT_EQ(f->params[1]->symbol, p->builder().Symbols().Get("b"));
EXPECT_TRUE(f->return_type->Is<ast::Void>());
}
TEST_F(ParserImplTest, FunctionHeader_TrailingComma) {
auto p = parser("fn main(a :i32,)");
auto f = p->function_header();
EXPECT_TRUE(f.matched);
EXPECT_FALSE(f.errored);
EXPECT_EQ(f->name, "main");
ASSERT_EQ(f->params.size(), 1u);
EXPECT_EQ(f->params[0]->symbol, p->builder().Symbols().Get("a"));
EXPECT_TRUE(f->return_type->Is<ast::Void>());
}
TEST_F(ParserImplTest, FunctionHeader_AttributeReturnType) {
auto p = parser("fn main() -> @location(1) f32");
auto f = p->function_header();
ASSERT_FALSE(p->has_error()) << p->error();
EXPECT_TRUE(f.matched);
EXPECT_FALSE(f.errored);
EXPECT_EQ(f->name, "main");
EXPECT_EQ(f->params.size(), 0u);
EXPECT_TRUE(f->return_type->Is<ast::F32>());
ASSERT_EQ(f->return_type_attributes.size(), 1u);
auto* loc = f->return_type_attributes[0]->As<ast::LocationAttribute>();
ASSERT_TRUE(loc != nullptr);
EXPECT_EQ(loc->value, 1u);
}
TEST_F(ParserImplTest, FunctionHeader_InvariantReturnType) {
auto p = parser("fn main() -> @invariant f32");
auto f = p->function_header();
ASSERT_FALSE(p->has_error()) << p->error();
EXPECT_TRUE(f.matched);
EXPECT_FALSE(f.errored);
EXPECT_EQ(f->name, "main");
EXPECT_EQ(f->params.size(), 0u);
EXPECT_TRUE(f->return_type->Is<ast::F32>());
ASSERT_EQ(f->return_type_attributes.size(), 1u);
EXPECT_TRUE(f->return_type_attributes[0]->Is<ast::InvariantAttribute>());
}
TEST_F(ParserImplTest, FunctionHeader_MissingIdent) {
auto p = parser("fn ()");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:4: expected identifier for function declaration");
}
TEST_F(ParserImplTest, FunctionHeader_InvalidIdent) {
auto p = parser("fn 133main() -> i32");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:4: expected identifier for function declaration");
}
TEST_F(ParserImplTest, FunctionHeader_MissingParenLeft) {
auto p = parser("fn main) -> i32");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:8: expected '(' for function declaration");
}
TEST_F(ParserImplTest, FunctionHeader_InvalidParamList) {
auto p = parser("fn main(a :i32, ,) -> i32");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:17: expected ')' for function declaration");
}
TEST_F(ParserImplTest, FunctionHeader_MissingParenRight) {
auto p = parser("fn main( -> i32");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:10: expected ')' for function declaration");
}
TEST_F(ParserImplTest, FunctionHeader_MissingReturnType) {
auto p = parser("fn main() ->");
auto f = p->function_header();
EXPECT_FALSE(f.matched);
EXPECT_TRUE(f.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:13: unable to determine function return type");
}
} // namespace
} // namespace tint::reader::wgsl