blob: c8c30cfac67856b9990676111cce4328f6b5c9cd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
const builtin = @import("builtin");
extern "c" fn write(usize, usize, usize) usize;
pub fn main() void {
var i: u32 = 0;
inline while (i < 4) : (i += 1) print();
assert(i == 4);
}
fn print() void {
switch (builtin.os.tag) {
.linux => {
asm volatile ("syscall"
:
: [number] "{rax}" (1),
[arg1] "{rdi}" (1),
[arg2] "{rsi}" (@ptrToInt("hello\n")),
[arg3] "{rdx}" (6),
: "rcx", "r11", "memory"
);
},
.macos => {
_ = write(1, @ptrToInt("hello\n"), 6);
},
else => unreachable,
}
}
pub fn assert(ok: bool) void {
if (!ok) unreachable; // assertion failure
}
// error
//
// :3:21: error: unable to resolve comptime value
|
