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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/ast/id_attribute.h"
#include "src/tint/writer/glsl/test_helper.h"
using namespace tint::number_suffixes; // NOLINT
namespace tint::writer::glsl {
namespace {
using GlslGeneratorImplTest_ModuleConstant = TestHelper;
TEST_F(GlslGeneratorImplTest_ModuleConstant, Emit_ModuleConstant) {
auto* var = Let("pos", ty.array<f32, 3>(), array<f32, 3>(1_f, 2_f, 3_f));
WrapInFunction(Decl(var));
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.EmitProgramConstVariable(var)) << gen.error();
EXPECT_EQ(gen.result(), "const float pos[3] = float[3](1.0f, 2.0f, 3.0f);\n");
}
TEST_F(GlslGeneratorImplTest_ModuleConstant, Emit_SpecConstant) {
auto* var = Override("pos", ty.f32(), Expr(3_f),
ast::AttributeList{
Id(23),
});
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.EmitProgramConstVariable(var)) << gen.error();
EXPECT_EQ(gen.result(), R"(#ifndef WGSL_SPEC_CONSTANT_23
#define WGSL_SPEC_CONSTANT_23 3.0f
#endif
const float pos = WGSL_SPEC_CONSTANT_23;
)");
}
TEST_F(GlslGeneratorImplTest_ModuleConstant, Emit_SpecConstant_NoConstructor) {
auto* var = Override("pos", ty.f32(), nullptr,
ast::AttributeList{
Id(23),
});
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.EmitProgramConstVariable(var)) << gen.error();
EXPECT_EQ(gen.result(), R"(#ifndef WGSL_SPEC_CONSTANT_23
#error spec constant required for constant id 23
#endif
const float pos = WGSL_SPEC_CONSTANT_23;
)");
}
TEST_F(GlslGeneratorImplTest_ModuleConstant, Emit_SpecConstant_NoId) {
auto* a = Override("a", ty.f32(), Expr(3_f),
ast::AttributeList{
Id(0),
});
auto* b = Override("b", ty.f32(), Expr(2_f));
GeneratorImpl& gen = Build();
ASSERT_TRUE(gen.EmitProgramConstVariable(a)) << gen.error();
ASSERT_TRUE(gen.EmitProgramConstVariable(b)) << gen.error();
EXPECT_EQ(gen.result(), R"(#ifndef WGSL_SPEC_CONSTANT_0
#define WGSL_SPEC_CONSTANT_0 3.0f
#endif
const float a = WGSL_SPEC_CONSTANT_0;
#ifndef WGSL_SPEC_CONSTANT_1
#define WGSL_SPEC_CONSTANT_1 2.0f
#endif
const float b = WGSL_SPEC_CONSTANT_1;
)");
}
} // namespace
} // namespace tint::writer::glsl