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tests/cases/conformance/jsdoc/a.js(4,5): error TS2322: Type 'null' is not assignable to type 'number | undefined'.
tests/cases/conformance/jsdoc/a.js(8,3): error TS2345: Argument of type 'null' is not assignable to parameter of type 'number | undefined'.
==== tests/cases/conformance/jsdoc/a.js (2 errors) ====
/** @param {number=} a */
function f(a) {
a = 1
a = null // should not be allowed
~
!!! error TS2322: Type 'null' is not assignable to type 'number | undefined'.
a = undefined
}
f()
f(null) // should not be allowed
~~~~
!!! error TS2345: Argument of type 'null' is not assignable to parameter of type 'number | undefined'.
f(undefined)
f(1)
/** @param {???!?number?=} a */
function g(a) {
a = 1
a = null
a = undefined
}
g()
g(null)
g(undefined)
g(1)
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