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// Copyright 2021 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/resolver/resolver.h"
#include "src/tint/resolver/resolver_test_helper.h"
using namespace tint::number_suffixes; // NOLINT
namespace tint::resolver {
namespace {
class ResolverOverrideTest : public ResolverTest {
protected:
/// Verify that the AST node `var` was resolved to an overridable constant
/// with an ID equal to `id`.
/// @param var the overridable constant AST node
/// @param id the expected constant ID
void ExpectOverrideId(const ast::Variable* var, uint16_t id) {
auto* sem = Sem().Get<sem::GlobalVariable>(var);
ASSERT_NE(sem, nullptr);
EXPECT_EQ(sem->Declaration(), var);
EXPECT_TRUE(sem->Declaration()->Is<ast::Override>());
EXPECT_EQ(sem->OverrideId().value, id);
EXPECT_FALSE(sem->ConstantValue());
}
};
TEST_F(ResolverOverrideTest, NonOverridable) {
auto* a = GlobalConst("a", ty.f32(), Expr(1_f));
EXPECT_TRUE(r()->Resolve()) << r()->error();
auto* sem_a = Sem().Get<sem::GlobalVariable>(a);
ASSERT_NE(sem_a, nullptr);
EXPECT_EQ(sem_a->Declaration(), a);
EXPECT_FALSE(sem_a->Declaration()->Is<ast::Override>());
EXPECT_TRUE(sem_a->ConstantValue());
}
TEST_F(ResolverOverrideTest, WithId) {
auto* a = Override("a", ty.f32(), Expr(1_f), Id(7u));
EXPECT_TRUE(r()->Resolve()) << r()->error();
ExpectOverrideId(a, 7u);
}
TEST_F(ResolverOverrideTest, WithoutId) {
auto* a = Override("a", ty.f32(), Expr(1_f));
EXPECT_TRUE(r()->Resolve()) << r()->error();
ExpectOverrideId(a, 0u);
}
TEST_F(ResolverOverrideTest, WithAndWithoutIds) {
std::vector<ast::Variable*> variables;
auto* a = Override("a", ty.f32(), Expr(1_f));
auto* b = Override("b", ty.f32(), Expr(1_f));
auto* c = Override("c", ty.f32(), Expr(1_f), Id(2u));
auto* d = Override("d", ty.f32(), Expr(1_f), Id(4u));
auto* e = Override("e", ty.f32(), Expr(1_f));
auto* f = Override("f", ty.f32(), Expr(1_f), Id(1u));
EXPECT_TRUE(r()->Resolve()) << r()->error();
// Verify that constant id allocation order is deterministic.
ExpectOverrideId(a, 0u);
ExpectOverrideId(b, 3u);
ExpectOverrideId(c, 2u);
ExpectOverrideId(d, 4u);
ExpectOverrideId(e, 5u);
ExpectOverrideId(f, 1u);
}
TEST_F(ResolverOverrideTest, DuplicateIds) {
Override("a", ty.f32(), Expr(1_f), Id(Source{{12, 34}}, 7u));
Override("b", ty.f32(), Expr(1_f), Id(Source{{56, 78}}, 7u));
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(), R"(56:78 error: override IDs must be unique
12:34 note: a override with an ID of 7 was previously declared here:)");
}
TEST_F(ResolverOverrideTest, IdTooLarge) {
Override("a", ty.f32(), Expr(1_f), Id(Source{{12, 34}}, 65536u));
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(), "12:34 error: override IDs must be between 0 and 65535");
}
TEST_F(ResolverOverrideTest, F16_TemporallyBan) {
Enable(ast::Extension::kF16);
Override(Source{{12, 34}}, "a", ty.f16(), Expr(1_h), Id(1u));
EXPECT_FALSE(r()->Resolve());
EXPECT_EQ(r()->error(), "12:34 error: 'override' of type f16 is not implemented yet");
}
} // namespace
} // namespace tint::resolver