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An identifier was used like a function name or a value was expected and the
identifier exists but it belongs to a different namespace.
Erroneous code example:
```compile_fail,E0423
struct Foo { a: bool };
let f = Foo();
// error: expected function, tuple struct or tuple variant, found `Foo`
// `Foo` is a struct name, but this expression uses it like a function name
```
Please verify you didn't misspell the name of what you actually wanted to use
here. Example:
```
fn Foo() -> u32 { 0 }
let f = Foo(); // ok!
```
It is common to forget the trailing `!` on macro invocations, which would also
yield this error:
```compile_fail,E0423
println("");
// error: expected function, tuple struct or tuple variant,
// found macro `println`
// did you mean `println!(...)`? (notice the trailing `!`)
```
Another case where this error is emitted is when a value is expected, but
something else is found:
```compile_fail,E0423
pub mod a {
pub const I: i32 = 1;
}
fn h1() -> i32 {
a.I
//~^ ERROR expected value, found module `a`
// did you mean `a::I`?
}
```
|
