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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef frontend_BinAST_macros_h
#define frontend_BinAST_macros_h

#include "vm/JSContext.h"

// Evaluate an expression EXPR, checking that the result is not falsy.
//
// Throw `cx->alreadyReportedError()` if it returns 0/nullptr.
#define BINJS_TRY(EXPR)                            \
  do {                                             \
    if (!EXPR) return cx_->alreadyReportedError(); \
  } while (false)

// Evaluate an expression EXPR, checking that the result is not falsy.
// In case of success, assign the result to VAR.
//
// Throw `cx->alreadyReportedError()` if it returns 0/nullptr.
#define BINJS_TRY_VAR(VAR, EXPR)                  \
  do {                                            \
    VAR = EXPR;                                   \
    if (!VAR) return cx_->alreadyReportedError(); \
  } while (false)

// Evaluate an expression EXPR, checking that the result is not falsy.
// In case of success, assign the result to a new variable VAR.
//
// Throw `cx->alreadyReportedError()` if it returns 0/nullptr.
#define BINJS_TRY_DECL(VAR, EXPR) \
  auto VAR = EXPR;                \
  if (!VAR) return cx_->alreadyReportedError();

#define BINJS_TRY_EMPL(VAR, EXPR)                            \
  do {                                                       \
    auto _tryEmplResult = EXPR;                              \
    if (!_tryEmplResult) return cx_->alreadyReportedError(); \
    VAR.emplace(_tryEmplResult.unwrap());                    \
  } while (false)

#define BINJS_MOZ_TRY_EMPLACE(VAR, EXPR)                 \
  do {                                                   \
    auto _tryEmplResult = EXPR;                          \
    if (_tryEmplResult.isErr())                          \
      return ::mozilla::Err(_tryEmplResult.unwrapErr()); \
    VAR.emplace(_tryEmplResult.unwrap());                \
  } while (false)

// Evaluate an expression EXPR, checking that the result is a success.
// In case of success, unwrap and assign the result to a new variable VAR.
//
// In case of error, propagate the error.
#define BINJS_MOZ_TRY_DECL(VAR, EXPR)                            \
  auto _##VAR = EXPR;                                            \
  if (_##VAR.isErr()) return ::mozilla::Err(_##VAR.unwrapErr()); \
  auto VAR = _##VAR.unwrap();

#endif  // frontend_BinAST_macros_h