Struct RuleST02 

pub struct RuleST02;

ST02: Unnecessary CASE expression.

Detects two patterns:

1. Boolean wrapping: CASE WHEN cond THEN TRUE ELSE FALSE END → use cond directly
2. IS NULL fallback: CASE WHEN x IS NULL THEN y ELSE x END → use COALESCE(x, y)

Trait Implementations

impl Debug for RuleST02

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RuleST02

fn default() -> RuleST02

Returns the “default value” for a type.

impl Rule for RuleST02

fn code(&self) -> &'static str

Rule code, e.g. “LT01”.

fn name(&self) -> &'static str

Human-readable name, e.g. “layout.spacing”.

fn description(&self) -> &'static str

One-line description.

fn explanation(&self) -> &'static str

Multi-sentence explanation for AI consumers.

fn groups(&self) -> &[RuleGroup]

Rule group.

fn is_fixable(&self) -> bool

Can this rule auto-fix violations?

fn crawl_type(&self) -> CrawlType

Which segments should be visited.

fn eval(&self, ctx: &RuleContext<'_>) -> Vec<LintViolation>

Evaluate the rule at the given context, returning violations.

fn configure(&mut self, _settings: &HashMap<String, String>)

Configure the rule with key-value settings from config. Default implementation is a no-op.