Interfaces.h

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//===- Interfaces.h - Interface wrapper classes -----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef MLIR_TABLEGEN_INTERFACES_H_
#define MLIR_TABLEGEN_INTERFACES_H_
 
#include "mlir/Support/LLVM.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator.h"
 
namespace llvm {
class Init;
class Record;
} // namespace llvm
 
namespace mlir {
namespace tblgen {
 
// Wrapper class with helper methods for accessing InterfaceMethod defined
// in TableGen.
class InterfaceMethod {
public:
  // This struct represents a single method argument.
  struct Argument {
    StringRef type;
    StringRef name;
  };
 
  explicit InterfaceMethod(const llvm::Record *def);
 
  // Return the return type of this method.
  StringRef getReturnType() const;
 
  // Return the name of this method.
  StringRef getName() const;
 
  // Return if this method is static.
  bool isStatic() const;
 
  // Return the body for this method if it has one.
  std::optional<StringRef> getBody() const;
 
  // Return the default implementation for this method if it has one.
  std::optional<StringRef> getDefaultImplementation() const;
 
  // Return the description of this method if it has one.
  std::optional<StringRef> getDescription() const;
 
  // Arguments.
  ArrayRef<Argument> getArguments() const;
  bool arg_empty() const;
 
private:
  // The TableGen definition of this method.
  const llvm::Record *def;
 
  // The arguments of this method.
  SmallVector<Argument, 2> arguments;
};
 
//===----------------------------------------------------------------------===//
// Interface
//===----------------------------------------------------------------------===//
 
// Wrapper class with helper methods for accessing Interfaces defined in
// TableGen.
class Interface {
public:
  explicit Interface(const llvm::Record *def);
  Interface(const Interface &rhs) : def(rhs.def), methods(rhs.methods) {
    for (auto &base : rhs.baseInterfaces)
      baseInterfaces.push_back(std::make_unique<Interface>(*base));
  }
 
  // Return the name of this interface.
  StringRef getName() const;
 
  // Returns this interface's name prefixed with namespaces.
  std::string getFullyQualifiedName() const;
 
  // Return the C++ namespace of this interface.
  StringRef getCppNamespace() const;
 
  // Return the methods of this interface.
  ArrayRef<InterfaceMethod> getMethods() const;
 
  // Return the description of this method if it has one.
  std::optional<StringRef> getDescription() const;
 
  // Return the interfaces extra class declaration code.
  std::optional<StringRef> getExtraClassDeclaration() const;
 
  // Return the traits extra class declaration code.
  std::optional<StringRef> getExtraTraitClassDeclaration() const;
 
  // Return the extra class declaration code shared between the interface and
  // trait classes.
  std::optional<StringRef> getExtraSharedClassDeclaration() const;
 
  // Return the extra classof method code.
  std::optional<StringRef> getExtraClassOf() const;
 
  // Return the verify method body if it has one.
  std::optional<StringRef> getVerify() const;
 
  // Return the base interfaces of this interface.
  auto getBaseInterfaces() const {
    return llvm::make_pointee_range(baseInterfaces);
  }
 
  // If there's a verify method, return if it needs to access the ops in the
  // regions.
  bool verifyWithRegions() const;
 
  // Returns the Tablegen definition this interface was constructed from.
  const llvm::Record &getDef() const { return *def; }
 
private:
  // The TableGen definition of this interface.
  const llvm::Record *def;
 
  // The methods of this interface.
  SmallVector<InterfaceMethod, 8> methods;
 
  // The base interfaces of this interface.
  SmallVector<std::unique_ptr<Interface>> baseInterfaces;
};
 
// An interface that is registered to an Attribute.
struct AttrInterface : public Interface {
  using Interface::Interface;
 
  static bool classof(const Interface *interface);
};
// An interface that is registered to an Operation.
struct OpInterface : public Interface {
  using Interface::Interface;
 
  static bool classof(const Interface *interface);
};
// An interface that is registered to a Type.
struct TypeInterface : public Interface {
  using Interface::Interface;
 
  static bool classof(const Interface *interface);
};
} // namespace tblgen
} // namespace mlir
 
#endif // MLIR_TABLEGEN_INTERFACES_H_