94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_NAMER_H_
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#define SRC_NAMER_H_
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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#include "src/symbol_table.h"
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namespace tint {
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/// Base class for the namers.
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class Namer {
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public:
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/// Constructor
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/// @param symbols the symbol table this namer works with
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explicit Namer(SymbolTable* symbols);
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/// Destructor
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virtual ~Namer();
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/// Returns the name for `sym`
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/// @param sym the symbol to retrieve the name for
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/// @returns the sanitized version of `name` or "" if not found
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virtual std::string NameFor(const Symbol& sym) = 0;
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/// Generates a unique name for `prefix`
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/// @param prefix the prefix name
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/// @returns the unique name string
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std::string GenerateName(const std::string& prefix);
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protected:
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/// Checks if `name` has been used
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/// @param name the name to check
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/// @returns true if `name` has already been used
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bool IsUsed(const std::string& name);
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/// The symbol table
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SymbolTable* symbols_ = nullptr;
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private:
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// The list of names taken by the remapper
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std::unordered_set<std::string> used_;
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};
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/// A namer class which mangles the name
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class MangleNamer : public Namer {
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public:
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/// Constructor
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/// @param symbols the symbol table this namer works with
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explicit MangleNamer(SymbolTable* symbols);
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/// Destructor
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~MangleNamer() override;
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/// Returns a mangled name for `sym`
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/// @param sym the symbol to name
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/// @returns the name for `sym` or "" if not found
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std::string NameFor(const Symbol& sym) override;
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};
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/// A namer which returns the user provided name. This is unsafe in general as
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/// it passes user provided data through to the backend compiler. It is useful
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/// for development and debugging.
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class UnsafeNamer : public Namer {
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public:
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/// Constructor
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/// @param symbols the symbol table this namer works with
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explicit UnsafeNamer(SymbolTable* symbols);
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/// Destructor
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~UnsafeNamer() override;
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/// Returns `name`
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/// @param sym the symbol
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/// @returns `name` or "" if not found
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std::string NameFor(const Symbol& sym) override;
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};
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} // namespace tint
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#endif // SRC_NAMER_H_
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