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tests/cases/conformance/controlFlow/controlFlowIIFE.ts(64,5): error TS2454: Variable 'v' is used before being assigned.
tests/cases/conformance/controlFlow/controlFlowIIFE.ts(72,5): error TS2454: Variable 'v' is used before being assigned.
==== tests/cases/conformance/controlFlow/controlFlowIIFE.ts (2 errors) ====
declare function getStringOrNumber(): string | number;
function f1() {
let x = getStringOrNumber();
if (typeof x === "string") {
let n = function() {
return x.length;
}();
}
}
function f2() {
let x = getStringOrNumber();
if (typeof x === "string") {
let n = (function() {
return x.length;
})();
}
}
function f3() {
let x = getStringOrNumber();
let y: number;
if (typeof x === "string") {
let n = (z => x.length + y + z)(y = 1);
}
}
// Repros from #8381
let maybeNumber: number | undefined;
(function () {
maybeNumber = 1;
})();
maybeNumber++;
if (maybeNumber !== undefined) {
maybeNumber++;
}
let test: string | undefined;
if (!test) {
throw new Error('Test is not defined');
}
(() => {
test.slice(1); // No error
})();
// Repro from #23565
function f4() {
let v: number;
(function() {
v = 1;
})();
v;
}
function f5() {
let v: number;
(function*() {
yield 1;
v = 1;
})();
v; // still undefined
~
!!! error TS2454: Variable 'v' is used before being assigned.
}
function f6() {
let v: number;
(async function() {
v = await 1;
})();
v; // still undefined
~
!!! error TS2454: Variable 'v' is used before being assigned.
}
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