meta.expr

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# Copyright (C) 2025 yuygfgg
# 
# This file is part of Vapoursynth-llvmexpr.
# 
# Vapoursynth-llvmexpr is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# Vapoursynth-llvmexpr is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with Vapoursynth-llvmexpr.  If not, see <https://www.gnu.org/licenses/>.
 
@define ___stdlib_meta_ERROR(msg) static_assert(0, msg)
 
@define ___stdlib_meta_ASSERT_CONST(expr, context, message) (is_consteval(expr) ? static_assert(expr, ___stdlib_meta__PASTE(context, message)) : ___stdlib_meta_ERROR(___stdlib_meta__PASTE(context, _must_be_a_constant_expression)))
 
@define ___stdlib_meta__PASTE(a, b) a@@b
 
@define ___stdlib_meta_PASTE(a, b) ___stdlib_meta__PASTE(a, b)
 
@define ___stdlib_meta__DEC(n) ((n) - 1)
 
@define ___stdlib_meta__JOIN(count, macro, sep) ((count) == 1 ? macro(0) : (___stdlib_meta__JOIN(___stdlib_meta__DEC(count), macro, sep) sep macro(___stdlib_meta__DEC(count))))
 
@define ___stdlib_meta_JOIN(count, macro, sep) (___stdlib_meta_ASSERT_CONST(count > 0, First_argument, _must_be_a_positive_integer) ? ___stdlib_meta__JOIN(count, macro, sep) : 0)
 
@define ___stdlib_meta__UNROLL(count, macro) ((count) == 1 ? macro(0) : ___stdlib_meta__UNROLL(___stdlib_meta__DEC(count), macro); macro(___stdlib_meta__DEC(count)))
 
@define ___stdlib_meta_UNROLL(count, macro) (___stdlib_meta_ASSERT_CONST(count > 0, First_argument, _must_be_a_positive_integer) ? ___stdlib_meta__UNROLL(count, macro) : 0)