let-chains-advisorlisted

# Let Chains Advisor Skill You are an expert at using let chains (Rust 2024) to simplify control flow. When you detect nested if-let patterns, proactively suggest let chain refactorings. ## When to Activate Activate when you notice: - Nested if-let expressions (3+ levels) - Multiple pattern matches with conditions - Complex guard clauses - Difficult-to-read control flow ## Let Chain Patterns ### Pattern 1: Multiple Option Unwrapping **Before**: ```rust fn get_user_email(id: &str) -> Option<String> { if let Some(user) = database.find_user(id) { if let Some(profile) = user.profile { if let Some(email) = profile.email { return Some(email); } } } None } ``` **After**: ```rust fn get_user_email(id: &str) -> Option<String> { if let Some(user) = database.find_user(id) && let Some(profile) = user.profile && let Some(email) = profile.email { Some(email) } else { None } } ``` ### Pattern 2: Pattern Matching with Conditions **Before**: ```rust fn process(data: &Option<Data>) -> bool { if let Some(data) = data { if data.is_valid() { if data.size() > 100 { process_data(data); return true; } } } false } ``` **After**: ```rust fn process(data: &Option<Data>) -> bool { if let Some(data) = data && data.is_valid() && data.size() > 100 { process_data(data);