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// Tests that we suggest the right alternatives when
// a builder method cannot be resolved
use std::net::TcpStream;
trait SomeTrait {}
struct Foo<T> {
v : T
}
impl<T: SomeTrait + Default> Foo<T> {
// Should not be suggested if constraint on the impl not met
fn new() -> Self {
Self { v: T::default() }
}
}
struct Bar;
impl Bar {
// Should be suggested
fn build() -> Self {
Self {}
}
// Method with self can't be a builder.
// Should not be suggested
fn build_with_self(&self) -> Self {
Self {}
}
}
mod SomeMod {
use crate::Bar;
impl Bar {
// Public method. Should be suggested
pub fn build_public() -> Self {
Self {}
}
// Private method. Should not be suggested
fn build_private() -> Self {
Self {}
}
}
}
fn main() {
// `new` not found on `TcpStream` and `connect` should be suggested
let _stream = TcpStream::new();
//~^ ERROR no function or associated item named `new` found
// Although `new` is found on `<impl Foo<T>>` it should not be
// suggested because `u8` does not meet the `T: SomeTrait` constraint
let _foo = Foo::<u8>::new();
//~^ ERROR the function or associated item `new` exists for struct `Foo<u8>`, but its trait bounds were not satisfied
// Should suggest only `<impl Bar>::build()` and `SomeMod::<impl Bar>::build_public()`.
// Other methods should not suggested because they are private or are not a builder
let _bar = Bar::new();
//~^ ERROR no function or associated item named `new` found
}
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