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const std = @import("std");
const testing = std.testing;
const builtin = @import("builtin");
fn add(count: c_int, ...) callconv(.c) c_int {
var ap = @cVaStart();
defer @cVaEnd(&ap);
var i: usize = 0;
var sum: c_int = 0;
while (i < count) : (i += 1) {
sum += @cVaArg(&ap, c_int);
}
return sum;
}
test "defining a variadic function" {
if (builtin.cpu.arch == .aarch64 and builtin.os.tag != .macos) {
// https://github.com/ziglang/zig/issues/14096
return error.SkipZigTest;
}
if (builtin.cpu.arch == .x86_64 and builtin.os.tag == .windows) {
// https://github.com/ziglang/zig/issues/16961
return error.SkipZigTest;
}
if (builtin.cpu.arch == .s390x) {
// https://github.com/ziglang/zig/issues/21350#issuecomment-3543006475
return error.SkipZigTest;
}
try std.testing.expectEqual(@as(c_int, 0), add(0));
try std.testing.expectEqual(@as(c_int, 1), add(1, @as(c_int, 1)));
try std.testing.expectEqual(@as(c_int, 3), add(2, @as(c_int, 1), @as(c_int, 2)));
}
// test
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