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const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
fn add(args: anytype) i32 {
var sum = @as(i32, 0);
{
comptime var i: usize = 0;
inline while (i < args.len) : (i += 1) {
sum += args[i];
}
}
return sum;
}
test "add arbitrary args" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try expect(add(.{ @as(i32, 1), @as(i32, 2), @as(i32, 3), @as(i32, 4) }) == 10);
try expect(add(.{@as(i32, 1234)}) == 1234);
try expect(add(.{}) == 0);
}
fn readFirstVarArg(args: anytype) void {
_ = args[0];
}
test "send void arg to var args" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
readFirstVarArg(.{{}});
}
test "pass args directly" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try expect(addSomeStuff(.{ @as(i32, 1), @as(i32, 2), @as(i32, 3), @as(i32, 4) }) == 10);
try expect(addSomeStuff(.{@as(i32, 1234)}) == 1234);
try expect(addSomeStuff(.{}) == 0);
}
fn addSomeStuff(args: anytype) i32 {
return add(args);
}
test "runtime parameter before var args" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try expect((try extraFn(10, .{})) == 0);
try expect((try extraFn(10, .{false})) == 1);
try expect((try extraFn(10, .{ false, true })) == 2);
comptime {
try expect((try extraFn(10, .{})) == 0);
try expect((try extraFn(10, .{false})) == 1);
try expect((try extraFn(10, .{ false, true })) == 2);
}
}
fn extraFn(extra: u32, args: anytype) !usize {
_ = extra;
if (args.len >= 1) {
try expect(args[0] == false);
}
if (args.len >= 2) {
try expect(args[1] == true);
}
return args.len;
}
const foos = [_]fn (anytype) bool{
foo1,
foo2,
};
fn foo1(args: anytype) bool {
_ = args;
return true;
}
fn foo2(args: anytype) bool {
_ = args;
return false;
}
test "array of var args functions" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
try expect(foos[0](.{}));
try expect(!foos[1](.{}));
}
test "pass zero length array to var args param" {
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
doNothingWithFirstArg(.{""});
}
fn doNothingWithFirstArg(args: anytype) void {
_ = args[0];
}
test "simple variadic function" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.os.tag != .macos and comptime builtin.cpu.arch.isAARCH64()) {
// https://github.com/ziglang/zig/issues/14096
return error.SkipZigTest;
}
if (builtin.cpu.arch == .x86_64 and builtin.os.tag == .windows) return error.SkipZigTest; // TODO
const S = struct {
fn simple(...) callconv(.C) c_int {
var ap = @cVaStart();
defer @cVaEnd(&ap);
return @cVaArg(&ap, c_int);
}
fn compatible(_: c_int, ...) callconv(.C) c_int {
var ap = @cVaStart();
defer @cVaEnd(&ap);
return @cVaArg(&ap, c_int);
}
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;
}
};
if (builtin.zig_backend != .stage2_c) {
// pre C23 doesn't support varargs without a preceding runtime arg.
try std.testing.expectEqual(@as(c_int, 0), S.simple(@as(c_int, 0)));
try std.testing.expectEqual(@as(c_int, 1024), S.simple(@as(c_int, 1024)));
}
try std.testing.expectEqual(@as(c_int, 0), S.compatible(undefined, @as(c_int, 0)));
try std.testing.expectEqual(@as(c_int, 1024), S.compatible(undefined, @as(c_int, 1024)));
try std.testing.expectEqual(@as(c_int, 0), S.add(0));
try std.testing.expectEqual(@as(c_int, 1), S.add(1, @as(c_int, 1)));
try std.testing.expectEqual(@as(c_int, 3), S.add(2, @as(c_int, 1), @as(c_int, 2)));
}
test "variadic functions" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.os.tag != .macos and comptime builtin.cpu.arch.isAARCH64()) {
// https://github.com/ziglang/zig/issues/14096
return error.SkipZigTest;
}
if (builtin.cpu.arch == .x86_64 and builtin.os.tag == .windows) return error.SkipZigTest; // TODO
const S = struct {
fn printf(list_ptr: *std.ArrayList(u8), format: [*:0]const u8, ...) callconv(.C) void {
var ap = @cVaStart();
defer @cVaEnd(&ap);
vprintf(list_ptr, format, &ap);
}
fn vprintf(
list: *std.ArrayList(u8),
format: [*:0]const u8,
ap: *std.builtin.VaList,
) callconv(.C) void {
for (std.mem.span(format)) |c| switch (c) {
's' => {
const arg = @cVaArg(ap, [*:0]const u8);
list.writer().print("{s}", .{arg}) catch return;
},
'd' => {
const arg = @cVaArg(ap, c_int);
list.writer().print("{d}", .{arg}) catch return;
},
else => unreachable,
};
}
};
var list = std.ArrayList(u8).init(std.testing.allocator);
defer list.deinit();
S.printf(&list, "dsd", @as(c_int, 1), @as([*:0]const u8, "hello"), @as(c_int, 5));
try std.testing.expectEqualStrings("1hello5", list.items);
}
test "copy VaList" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.os.tag != .macos and comptime builtin.cpu.arch.isAARCH64()) {
// https://github.com/ziglang/zig/issues/14096
return error.SkipZigTest;
}
if (builtin.cpu.arch == .x86_64 and builtin.os.tag == .windows) return error.SkipZigTest; // TODO
const S = struct {
fn add(count: c_int, ...) callconv(.C) c_int {
var ap = @cVaStart();
defer @cVaEnd(&ap);
var copy = @cVaCopy(&ap);
defer @cVaEnd(©);
var i: usize = 0;
var sum: c_int = 0;
while (i < count) : (i += 1) {
sum += @cVaArg(&ap, c_int);
sum += @cVaArg(©, c_int) * 2;
}
return sum;
}
};
try std.testing.expectEqual(@as(c_int, 0), S.add(0));
try std.testing.expectEqual(@as(c_int, 3), S.add(1, @as(c_int, 1)));
try std.testing.expectEqual(@as(c_int, 9), S.add(2, @as(c_int, 1), @as(c_int, 2)));
}
test "unused VaList arg" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.os.tag != .macos and comptime builtin.cpu.arch.isAARCH64()) {
// 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; // TODO
}
const S = struct {
fn thirdArg(dummy: c_int, ...) callconv(.C) c_int {
_ = dummy;
var ap = @cVaStart();
defer @cVaEnd(&ap);
_ = @cVaArg(&ap, c_int);
return @cVaArg(&ap, c_int);
}
};
const x = S.thirdArg(0, @as(c_int, 1), @as(c_int, 2));
try std.testing.expectEqual(@as(c_int, 2), x);
}
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