[][src]Struct rustc::infer::error_reporting::nice_region_error::NiceRegionError

pub struct NiceRegionError<'cx, 'gcx: 'tcx, 'tcx: 'cx> {
    tcx: TyCtxt<'cx, 'gcx, 'tcx>,
    error: Option<RegionResolutionError<'tcx>>,
    regions: Option<(Span, Region<'tcx>, Region<'tcx>)>,
    tables: Option<&'cx TypeckTables<'tcx>>,
}
🔬 This is a nightly-only experimental API. (rustc_private)

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Fields

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Methods

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Print the error message for lifetime errors when both the concerned regions are anonymous.

Consider a case where we have

fn foo(x: &mut Vec<&u8>, y: &u8) {
    x.push(y);
}

The example gives

fn foo(x: &mut Vec<&u8>, y: &u8) {
                   ---      --- these references are declared with different lifetimes...
    x.push(y);
    ^ ...but data from `y` flows into `x` here

It has been extended for the case of structs too.

Consider the example

struct Ref<'a> { x: &'a u32 }
fn foo(mut x: Vec<Ref>, y: Ref) {
                  ---      --- these structs are declared with different lifetimes...
    x.push(y);
    ^ ...but data from `y` flows into `x` here
}

It will later be extended to trait objects.

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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This function calls the visit_ty method for the parameters corresponding to the anonymous regions. The nested_visitor.found_type contains the anonymous type.

Arguments

region - the anonymous region corresponding to the anon_anon conflict br - the bound region corresponding to the above region which is of type BrAnon(_)

Example

fn foo(x: &mut Vec<&u8>, y: &u8)
   { x.push(y); }

The function returns the nested type corresponding to the anonymous region for e.g. &u8 and Vec<&u8.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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When given a ConcreteFailure for a function with arguments containing a named region and an anonymous region, emit an descriptive diagnostic error.

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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Print the error message for lifetime errors when binding excapes a closure.

Consider a case where we have

fn with_int<F>(f: F) where F: FnOnce(&isize) {
    let x = 3;
    f(&x);
}
fn main() {
    let mut x = None;
    with_int(|y| x = Some(y));
}

the output will be

    let mut x = None;
        ----- borrowed data cannot be stored into here...
    with_int(|y| x = Some(y));
             ---          ^ cannot be stored outside of its closure
             |
             ...because it cannot outlive this closure

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Print the error message for lifetime errors when the return type is a static impl Trait.

impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl<'cx, 'gcx, 'tcx> NiceRegionError<'cx, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Auto Trait Implementations

impl<'cx, 'gcx, 'tcx> !Send for NiceRegionError<'cx, 'gcx, 'tcx>

impl<'cx, 'gcx, 'tcx> !Sync for NiceRegionError<'cx, 'gcx, 'tcx>

Blanket Implementations

impl<T> MaybeResult for T
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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impl<'a, T> Captures for T where
    T: ?Sized
[src]

impl<T> From for T
[src]

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
[src]

Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
[src]

Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
[src]

Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
[src]

🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<E> SpecializationError for E
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
[src]

impl<T> Send for T where
    T: ?Sized
[src]

impl<T> Sync for T where
    T: ?Sized
[src]

impl<T> Erased for T