07e7823c01
If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
15 lines
354 B
Rust
15 lines
354 B
Rust
fn main() {
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let mut v = vec!["hello", "this", "is", "a", "test"];
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let v2 = Vec::new();
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v.into_iter().map(|s|s.to_owned()).collect::<Vec<_>>();
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let mut a = String::new();
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for i in v {
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a = *i.to_string();
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//~^ ERROR mismatched types
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//~| NOTE expected struct `String`, found `str`
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v2.push(a);
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}
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}
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