Function: isTypeAssignableTo()

function isTypeAssignableTo(
    checker: Readonly<ts.TypeChecker>,
    sourceType: Readonly<ts.Type>,
    targetType: Readonly<ts.Type>
): boolean;

Defined in: _internal/typed-rule.ts:213

Determine whether one TypeScript type is assignable to another.

Parameters

checker

Readonly<ts.TypeChecker>

TypeScript type checker.

sourceType

Readonly<ts.Type>

Candidate source type.

targetType

Readonly<ts.Type>

Candidate target type.

Returns

boolean

true when assignable; otherwise false.

Remarks

Uses checker.isTypeAssignableTo when available and falls back to strict reference equality if the checker API is unavailable or throws.