// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

#include "toolchain/sem_ir/inst.h"

namespace Carbon::SemIR {

auto Inst::Print(llvm::raw_ostream& out) const -> void {
  out << "{kind: " << kind();

  auto print_args = [&](auto info) {
    using Info = decltype(info);
    if constexpr (Info::NumArgs > 0) {
      out << ", arg0: " << FromRaw<typename Info::template ArgType<0>>(arg0_);
    }
    if constexpr (Info::NumArgs > 1) {
      out << ", arg1: " << FromRaw<typename Info::template ArgType<1>>(arg1_);
    }
  };

  switch (kind()) {
#define CARBON_SEM_IR_INST_KIND(Name)               \
  case Name::Kind:                                  \
    print_args(Internal::InstLikeTypeInfo<Name>()); \
    break;
#include "toolchain/sem_ir/inst_kind.def"
  }
  if (type_id_.has_value()) {
    out << ", type: " << type_id_;
  }
  out << "}";
}

// Returns the IdKind of an instruction's argument, or None if there is no
// argument with that index.
template <typename InstKind, int ArgIndex>
static constexpr auto IdKindFor() -> IdKind {
  using Info = Internal::InstLikeTypeInfo<InstKind>;
  if constexpr (ArgIndex < Info::NumArgs) {
    return IdKind::For<typename Info::template ArgType<ArgIndex>>;
  } else {
    return IdKind::None;
  }
}

const std::pair<IdKind, IdKind> Inst::ArgKindTable[] = {
#define CARBON_SEM_IR_INST_KIND(Name) \
  {IdKindFor<Name, 0>(), IdKindFor<Name, 1>()},
#include "toolchain/sem_ir/inst_kind.def"
};

}  // namespace Carbon::SemIR