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