// `log.sx` leveled logging + the `is_comptime()` builtin (ERR step E4.1,
// slice 1). `log.{warn,info,err,debug}` interpolate like `print` and write
// `LEVEL: <msg>` to stderr. `is_comptime()` is `true` under `#run` (the
// comptime interpreter) and folds to `false` in compiled code, so a gated
// branch dead-codes out of the runtime binary.
//
// (`log.error` is spelled `log.err` — `error` is a reserved keyword. The
// `process.exit` / `assert` part of E4.1 is blocked on `noreturn` codegen,
// issue 0058.)
//
// The test runner merges stderr+stdout; the log lines (stderr) precede the
// single stdout line. Expected exit code: 0.

#import "modules/std.sx";
log :: #import "modules/std/log.sx";

probe :: () -> s32 {
    if is_comptime() { return 1; }       // comptime interpreter path
    return 2;                             // compiled-code path
}

CT :: #run probe();                       // folds to 1 (run in the interpreter)

main :: () -> s32 {
    log.warn("disk {}% full", 91);
    log.info("user {} connected", "alice");
    log.err("bad fd {}", 7);
    log.debug("trace x={}", 42);
    print("[stdout] is_comptime runtime={} comptime={}\n", probe(), CT);
    return 0;
}