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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.
#ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_RENAMER_H_
#define SRC_TINT_LANG_WGSL_AST_TRANSFORM_RENAMER_H_
#include <string>
#include <unordered_map>
#include "src/tint/lang/wgsl/ast/transform/transform.h"
namespace tint::ast::transform {
/// Renamer is a Transform that renames all the symbols in a program.
class Renamer final : public Castable<Renamer, Transform> {
public:
/// Data is outputted by the Renamer transform.
/// Data holds information about shader usage and constant buffer offsets.
struct Data final : public Castable<Data, transform::Data> {
/// Remappings is a map of old symbol name to new symbol name
using Remappings = std::unordered_map<std::string, std::string>;
/// Constructor
/// @param remappings the symbol remappings
explicit Data(Remappings&& remappings);
/// Copy constructor
Data(const Data&);
/// Destructor
~Data() override;
/// A map of old symbol name to new symbol name
const Remappings remappings;
};
/// Target is an enumerator of rename targets that can be used
enum class Target {
/// Rename every symbol.
kAll,
/// Only rename symbols that are reserved keywords in GLSL.
kGlslKeywords,
/// Only rename symbols that are reserved keywords in HLSL.
kHlslKeywords,
/// Only rename symbols that are reserved keywords in MSL.
kMslKeywords,
};
/// Optional configuration options for the transform.
/// If omitted, then the renamer will use Target::kAll.
struct Config final : public Castable<Config, transform::Data> {
/// Constructor
/// @param tgt the targets to rename
/// @param keep_unicode if false, symbols with non-ascii code-points are
/// renamed
explicit Config(Target tgt, bool keep_unicode = false);
/// Copy constructor
Config(const Config&);
/// Destructor
~Config() override;
/// The targets to rename
Target const target = Target::kAll;
/// If false, symbols with non-ascii code-points are renamed.
bool preserve_unicode = false;
};
/// Constructor using a the configuration provided in the input Data
Renamer();
/// Destructor
~Renamer() 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_RENAMER_H_