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const builtin = @import("builtin");
const expect = @import("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" {
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" {
readFirstVarArg(.{{}});
}
test "pass args directly" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
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
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" {
try expect(foos[0](.{}));
try expect(!foos[1](.{}));
}
test "pass zero length array to var args param" {
doNothingWithFirstArg(.{""});
}
fn doNothingWithFirstArg(args: anytype) void {
_ = args[0];
}
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