TypeScript Generics Usage
Flags generic-type arity, unused type parameters, broad constraints, and missing constraints.
Generic type parameters are TypeScript's main tool for safe abstraction, but they have costs: each parameter is a degree of freedom callers must understand and satisfy. High arity (5+ type parameters), unused parameters, single-use parameters, and overly broad constraints all signal that a generic is overspecified for its actual use sites.
Severity guide
- info
- Generic usage is unusual but acceptable; review during a refactor.
- warning
- Generic shape will confuse callers or hide bugs; refactor recommended.
- critical
- Not currently emitted by this analysis.
Remediation
Reduce type-parameter arity, remove unused parameters, narrow over-broad constraints, and add constraints where they would prevent invalid uses.
Reduce type-parameter arity, remove unused parameters, narrow over-broad constraints, and add constraints where they would prevent invalid uses.