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Sarj Sarj Sarj Standards

prefer-or-pattern

Merge adjacent case arms with identical bodies into one or-pattern.

SARJ070 Rule source Tests Catalog JSON

Why

An or-pattern expresses shared handling once and prevents identical arms from drifting apart.

Fix

Join the equivalent patterns with | and keep their shared body under the merged arm.

Examples

Before — flagged Adjacent match arms repeat one body
app/settings.py
def status(value):
    match value:
        case "queued":
            return "active"
        case "running":
            return "active"
After — preferred One or-pattern owns the shared body
app/settings.py
def status(value):
    match value:
        case "queued" | "running":
            return "active"