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typeof doesn't work with #private fields - identifier expected #54337
Description
Bug Report
🔎 Search Terms
typeof, private field, class field, identifier expected
🕗 Version & Regression Information
- This changed between versions 4.3.5 and 4.4.4 (prior to 4.4.4,
typeofdidn't work at all). - I have tested in 5.0.4 (bug is there)
- I have tested in 5.1.0 Beta (bug is there).
⏯ Playground Link
Playground link with relevant code
💻 Code
class Foo {
private privateVal : number = 42;
testFunc() {
let d : typeof this.privateVal; //this works
d = this.privateVal + 1;
return d;
}
}
class Bar {
#privateVal : number = 42;
testFunc() {
let d : typeof this.#privateVal; //this fails: identifier expected
d = this.#privateVal + 1;
return d;
}
}🙁 Actual behavior
Code should have compiled. A private field / class field should be treated as an identifier.
🙂 Expected behavior
I'd expect typeof this.#privateVal; to be number.
Activity
MartinJohns commentedon May 21, 2023
Duplicate of #47595.
fatcerberus commentedon May 21, 2023
It appears this was fixed but later reverted because it caused a disruptive breaking change and requires architectural changes for a proper fix
typescript-bot commentedon May 24, 2023
This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.