Function run_guarded

codegraph-kernel/src/stack.rs:171–180

Run one extraction under the guard. A walk that tripped the guard returns a `defer:` error — the TS side's routine "take the wasm path" signal — regardless of what the truncated walk produced.

(f: impl FnOnce() -> Result<T, String>)

/// a `defer:` error — the TS side's routine "take the wasm path" signal —
/// regardless of what the truncated walk produced.
pub fn run_guarded<T>(f: impl FnOnce() -> Result<T, String>) -> Result<T, String> {
    begin();
    let out = f();
    if overflowed() {
        return Err(
            "defer: nesting too deep for the native walker — wasm recovery handles it".to_string(),
        );
    }
    out
}

#[cfg(test)]
mod tests {