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// 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.
#ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_SUBSTITUTE_OVERRIDE_H_
#define SRC_TINT_LANG_WGSL_AST_TRANSFORM_SUBSTITUTE_OVERRIDE_H_
#include <string>
#include <unordered_map>
#include "src/tint/api/common/override_id.h"
#include "src/tint/lang/wgsl/ast/transform/transform.h"
#include "src/tint/utils/reflection/reflection.h"
namespace tint::ast::transform {
/// A transform that replaces overrides with the constant values provided.
///
/// # Example
/// ```
/// override width: f32;
/// @id(1) override height: i32 = 4;
/// override depth = 1i;
/// ```
///
/// When transformed with `width` -> 1, `1` -> 22, `depth` -> 42
///
/// ```
/// const width: f32 = 1f;
/// const height: i32 = 22i;
/// const depth = 42i;
/// ```
///
/// @see crbug.com/tint/1582
class SubstituteOverride final : public Castable<SubstituteOverride, Transform> {
public:
/// Configuration options for the transform
struct Config final : public Castable<Config, Data> {
/// Constructor
Config();
/// Copy constructor
Config(const Config&);
/// Destructor
~Config() override;
/// Assignment operator
/// @returns this Config
Config& operator=(const Config&);
/// The map of override identifier to the override value.
/// The value is always a double coming into the transform and will be
/// converted to the correct type through and initializer.
std::unordered_map<OverrideId, double> map;
/// Reflect the fields of this class so that it can be used by tint::ForeachField()
TINT_REFLECT(map);
};
/// Constructor
SubstituteOverride();
/// Destructor
~SubstituteOverride() override;
/// @copydoc Transform::Apply
ApplyResult Apply(const Program& program,
const DataMap& inputs,
DataMap& outputs) const override;
};
} // namespace tint::ast::transform
#endif // SRC_TINT_LANG_WGSL_AST_TRANSFORM_SUBSTITUTE_OVERRIDE_H_