debug.vi`

Debugging-related utilities.

`Show` `root/debug/Show.vi`

trait Show[T];
enum Show { ... }

const enabled: Bool;

Whether debug mode is enabled.

fn log[T; Cast[T, String]](msg: T);

fn backtrace() -> Option[&List[Frame]];

fn error[M, T; Cast[M, String]](msg: M) -> T;

fn error_with[M, T, U; Cast[M, String]](msg: M, ctx: T) -> U;

fn dbg[T; Show[T]](value: T) -> T;

fn dbg_msg[T; Show[T]](value: T, msg: String) -> T;

fn with_state[F](f: F) -> WithState[F];

struct WithState[F](...);

struct Frame({ col: N32, file: String, line: N32, path: List[String] });