//===- TypeRange.cpp ------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "mlir/IR/TypeRange.h"
#include "mlir/IR/Operation.h"

using namespace mlir;

//===----------------------------------------------------------------------===//
// TypeRange

TypeRange::TypeRange(ArrayRef<Type> types)
    : TypeRange(types.data(), types.size()) {
  assert(llvm::all_of(types, [](Type t) { return t; }) &&
         "attempting to construct a TypeRange with null types");
}
TypeRange::TypeRange(OperandRange values)
    : TypeRange(values.begin().getBase(), values.size()) {}
TypeRange::TypeRange(ResultRange values)
    : TypeRange(values.getBase(), values.size()) {}
TypeRange::TypeRange(ValueRange values) : TypeRange(OwnerT(), values.size()) {
  if (count == 0)
    return;
  ValueRange::OwnerT owner = values.begin().getBase();
  if (auto *result = owner.dyn_cast<detail::OpResultImpl *>())
    this->base = result;
  else if (auto *operand = owner.dyn_cast<OpOperand *>())
    this->base = operand;
  else
    this->base = owner.get<const Value *>();
}

/// See `llvm::detail::indexed_accessor_range_base` for details.
TypeRange::OwnerT TypeRange::offset_base(OwnerT object, ptrdiff_t index) {
  if (const auto *value = object.dyn_cast<const Value *>())
    return {value + index};
  if (auto *operand = object.dyn_cast<OpOperand *>())
    return {operand + index};
  if (auto *result = object.dyn_cast<detail::OpResultImpl *>())
    return {result->getNextResultAtOffset(index)};
  return {object.dyn_cast<const Type *>() + index};
}

/// See `llvm::detail::indexed_accessor_range_base` for details.
Type TypeRange::dereference_iterator(OwnerT object, ptrdiff_t index) {
  if (const auto *value = object.dyn_cast<const Value *>())
    return (value + index)->getType();
  if (auto *operand = object.dyn_cast<OpOperand *>())
    return (operand + index)->get().getType();
  if (auto *result = object.dyn_cast<detail::OpResultImpl *>())
    return result->getNextResultAtOffset(index)->getType();
  return object.dyn_cast<const Type *>()[index];
}
