build/config/fuchsia_cxx_version.gni

# Copyright 2023 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

declare_args() {
  # **NOTE:** This is for **experimentation only** and should not normally be
  # changed.  Set the version of the C++ standard to compile for, 17 or 20.
  # Note also that GN code should never use this variable directly, but always
  # instead use the `fuchsia_cxx_version` variable.
  experimental_cxx_version = 17
}

assert(experimental_cxx_version == 17 || experimental_cxx_version == 20,
       "`experimental_cxx_version` must be either 17 or 20")

# The C++ standard version with which the Fuchsia build compiles C++ code.
# Possible values are 17 and 20 (as an integer).
#
# GN code both in fuchsia.git and in cooperating repositories should use only
# this variable, which can remain part of the Fuchsia build's internal GN API
# after the `experimental_cxx_version` build argument is removed.
fuchsia_cxx_version = experimental_cxx_version