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=== tests/cases/compiler/noUnusedLocals_writeOnly.ts ===
function f(x = 0, b = false) {
>f : Symbol(f, Decl(noUnusedLocals_writeOnly.ts, 0, 0))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
>b : Symbol(b, Decl(noUnusedLocals_writeOnly.ts, 0, 17))
// None of these statements read from 'x', so it will be marked unused.
x = 1;
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
x++;
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
x /= 2;
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
([x] = [1]);
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
({ x } = { x: 1 });
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 6, 6))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 6, 14))
({ x: x } = { x: 1 });
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 7, 6))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 7, 17))
({ a: [{ b: x }] } = { a: [{ b: 1 }] });
>a : Symbol(a, Decl(noUnusedLocals_writeOnly.ts, 8, 6))
>b : Symbol(b, Decl(noUnusedLocals_writeOnly.ts, 8, 12))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 0, 11))
>a : Symbol(a, Decl(noUnusedLocals_writeOnly.ts, 8, 26))
>b : Symbol(b, Decl(noUnusedLocals_writeOnly.ts, 8, 32))
({ x = 2 } = { x: b ? 1 : undefined });
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 9, 6))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 9, 18))
>b : Symbol(b, Decl(noUnusedLocals_writeOnly.ts, 0, 17))
>undefined : Symbol(undefined)
let used = 1;
>used : Symbol(used, Decl(noUnusedLocals_writeOnly.ts, 10, 7))
({ x = used } = { x: b ? 1 : undefined });
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 11, 6))
>used : Symbol(used, Decl(noUnusedLocals_writeOnly.ts, 10, 7))
>x : Symbol(x, Decl(noUnusedLocals_writeOnly.ts, 11, 21))
>b : Symbol(b, Decl(noUnusedLocals_writeOnly.ts, 0, 17))
>undefined : Symbol(undefined)
let y = 0;
>y : Symbol(y, Decl(noUnusedLocals_writeOnly.ts, 13, 7))
// This is a write access to y, but not a write-*only* access.
f(y++);
>f : Symbol(f, Decl(noUnusedLocals_writeOnly.ts, 0, 0))
>y : Symbol(y, Decl(noUnusedLocals_writeOnly.ts, 13, 7))
let z = 0;
>z : Symbol(z, Decl(noUnusedLocals_writeOnly.ts, 17, 7))
f(z = 1); // This effectively doesn't use `z`, values just pass through it.
>f : Symbol(f, Decl(noUnusedLocals_writeOnly.ts, 0, 0))
>z : Symbol(z, Decl(noUnusedLocals_writeOnly.ts, 17, 7))
}
function f2(_: ReadonlyArray<number>): void {}
>f2 : Symbol(f2, Decl(noUnusedLocals_writeOnly.ts, 19, 1))
>_ : Symbol(_, Decl(noUnusedLocals_writeOnly.ts, 20, 12))
>ReadonlyArray : Symbol(ReadonlyArray, Decl(lib.es5.d.ts, --, --))
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