Function isApplicableIndexType

test/fixtures/snapshot/typescript.js:59474–59480

(source, target)

                        undefined;
        }
        function isApplicableIndexType(source, target) {
            // A 'string' index signature applies to types assignable to 'string' or 'number', and a 'number' index
            // signature applies to types assignable to 'number', `${number}` and numeric string literal types.
            return isTypeAssignableTo(source, target) ||
                target === stringType && isTypeAssignableTo(source, numberType) ||
                target === numberType && (source === numericStringType || !!(source.flags & 128 /* TypeFlags.StringLiteral */) && ts.isNumericLiteralName(source.value));
        }
        function getIndexInfosOfStructuredType(type) {
            if (type.flags & 3670016 /* TypeFlags.StructuredType */) {
                var resolved = resolveStructuredTypeMembers(type);