zig/test/cases/x86_64-macos/assert_function.7.zig

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Zig

extern "c" fn write(usize, usize, usize) usize;
pub fn main() void {
var i: u32 = 0;
while (i < 4) : (i += 1) print();
assert(i == 4);
}
fn print() void {
_ = write(1, @ptrToInt("hello\n"), 6);
}
pub fn assert(ok: bool) void {
if (!ok) unreachable; // assertion failure
}
// run
//
// hello
// hello
// hello
// hello
//