Runtime-sink-file-reopen-truncate

Reopen the file sink behind a RuntimeSink in truncate mode. This helper is the explicit truncate-oriented direct recovery or reset shortcut.

Interface

pub fn RuntimeSink::file_reopen_truncate(self : RuntimeSink) -> Bool {

input

• self : RuntimeSink - Runtime sink whose file sink should be reopened in truncate mode.

output

• Bool - Whether reopen succeeded.

Explanation

Detailed rules explaining key parameters and behaviors

• Plain File runtime variants reopen in truncate mode.
• QueuedFile runtime variants forward reopen behavior to the wrapped inner file sink.
• This helper is a specialized shortcut for a common reset-style reopen mode.
• Non-file runtime variants return false.

How to Use

Here are some specific examples provided.

When Need A Fresh Output File

When a runtime file should be reopened from an empty state:

ignore(sink.file_reopen_truncate())

In this example, reopen behavior truncates the file before future writes continue.

When Want An Explicit Truncate Shortcut

When code should make destructive reopen intent obvious:

let ok = sink.file_reopen_truncate()

In this example, the call site expresses reset-style reopen behavior directly.

Error Case

e.g.:

• If the runtime sink is not file-backed, the method returns false.

• If callers want to preserve existing file content, file_reopen_append() is the correct API.

Notes

1. Use this helper when starting from a fresh file is intentional.

2. Truncate-mode reopen is a stronger action than generic reopen recovery.