anti-slop-prefer-effect-match

Intent: a choice among several literal values of the same expression is a Match, not a chain of ternaries.

// ❌ no
const label = kind === "a" ? "A" : kind === "b" ? "B" : "Other"

// ✅ yes
const label = Match.value(kind).pipe(
    Match.when("a", () => "A"),
    Match.when("b", () => "B"),
    Match.orElse(() => "Other"),
)

Trigger: a ternary chain of at least two levels where every condition compares the same expression, by source text, with a literal (==, ===, !=, !==).

Exemptions and blind spots: a single ternary, chains comparing different expressions, and the same expression written differently (a.b vs a["b"]). A chain returned by a match handler also fires no-nested-match: extract the handler first, since a Match.value left inside it fires no-nested-match again.

Why: a ternary chain hides which value is the fallback and cannot be made exhaustive.

Options: none

Fix: none

Origin: absorbed from dmmulroy/anti-slop, MIT-licensed: see LICENSE.anti-slop.