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.
28 lines
622 B
Rust
28 lines
622 B
Rust
mod stuff {
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pub struct Item {
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c_object: Box<CObj>,
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}
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pub struct CObj {
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name: Option<String>,
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}
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impl Item {
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pub fn new() -> Item {
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Item {
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c_object: Box::new(CObj { name: None }),
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}
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}
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}
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}
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macro_rules! check_ptr_exist {
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($var:expr, $member:ident) => (
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(*$var.c_object).$member.is_some()
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//~^ ERROR field `c_object` of struct `Item` is private
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);
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}
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fn main() {
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let item = stuff::Item::new();
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println!("{}", check_ptr_exist!(item, name));
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//~^ ERROR field `name` of struct `CObj` is private
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}
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