Module tries 

Tries wrapper — the CONDITIONAL innermost op-level wrapper (SRD-82 Part 3b). tries: is its sigil: the TOTAL number of attempts an op may make.

• No tries in scope → the wrapper is not constructed; the op runs single-attempt (the outermost error-handler wrapper records the single-attempt tallies).
• tries: 1 → identical to no wrapper (single attempt); the cascade skips construction.
• tries: 0 → the op FAILS WITHOUT EXECUTING: every cycle yields a synthesised tries_zero op error, routed through the op’s error policy like any terminal failure. The explicit “never run this” knob.
• tries: N ≥ 2 → up to N total attempts; a retryable attempt failure re-runs the inner op until the budget is spent.

When constructed it owns the whole ATTEMPT→RESULT boundary: it runs the inner op (adapter) one-or-more times, owns the attempt_* counters, catches a per-attempt panic, and returns exactly ONE terminal outcome to the layers above. Everything above it — traversal, result-binding, metrics, the outermost error-handler wrapper — sees a single result, never the retries.

Retryability is the ADAPTER’s signal: an ExecutionError::Op whose retryable flag is set (CQL timeouts/overloads are). The errors: policy is deliberately NOT consulted here — the two surfaces are orthogonal; the policy’s retry verb participates only by INJECTING a tries budget at dispenser build (the SRD-82 Part 3b bridge), never by steering the loop per-cycle.

Structs

TriesDispenser

Wraps an inner dispenser with a bounded attempt loop over retryable attempt failures, owning the attempt_* metrics and the per-attempt panic catch. Constructed only when a tries budget of 0 or ≥ 2 resolves for the op (see the module doc; 1 / absent skip construction).

Constants

NAME