# Struct rustc_codegen_llvm::coverageinfo::ffi::CounterMappingRegion

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    #[repr(C)]pub struct CounterMappingRegion {
        counter: Counter,
        false_counter: Counter,
        file_id: u32,
        expanded_file_id: u32,
        start_line: u32,
        start_col: u32,
        end_line: u32,
        end_col: u32,
        kind: RegionKind,
    }

Expand description

This struct provides LLVM’s representation of a “CoverageMappingRegion”, encoded into the coverage map, in accordance with the LLVM Code Coverage Mapping Format. The struct composes fields representing the `Counter` type and value(s) (injected counter ID, or expression type and operands), the source file (an indirect index into a “filenames array”, encoded separately), and source location (start and end positions of the represented code region).

Corresponds to struct `llvm::coverage::CounterMappingRegion`.

Must match the layout of `LLVMRustCounterMappingRegion`.

## Fields§

§`counter: Counter`

The counter type and type-dependent counter data, if any.

§`false_counter: Counter`

If the `RegionKind` is a `BranchRegion`, this represents the counter for the false branch of the region.

§`file_id: u32`

An indirect reference to the source filename. In the LLVM Coverage Mapping Format, the file_id is an index into a function-specific `virtual_file_mapping` array of indexes that, in turn, are used to look up the filename for this region.

§`expanded_file_id: u32`

If the `RegionKind` is an `ExpansionRegion`, the `expanded_file_id` can be used to find the mapping regions created as a result of macro expansion, by checking if their file id matches the expanded file id.

§`start_line: u32`

1-based starting line of the mapping region.

§`start_col: u32`

1-based starting column of the mapping region.

§`end_line: u32`

1-based ending line of the mapping region.

§`end_col: u32`

1-based ending column of the mapping region. If the high bit is set, the current mapping region is a gap area.

§`kind: RegionKind`

## Implementations§

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### impl CounterMappingRegion

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#### pub(crate) fn from_mapping( mapping_kind: &MappingKind, local_file_id: u32, code_region: &CodeRegion ) -> Self

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#### pub(crate) fn code_region( counter: Counter, file_id: u32, start_line: u32, start_col: u32, end_line: u32, end_col: u32 ) -> Self

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#### pub(crate) fn branch_region( counter: Counter, false_counter: Counter, file_id: u32, start_line: u32, start_col: u32, end_line: u32, end_col: u32 ) -> Self

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#### pub(crate) fn expansion_region( file_id: u32, expanded_file_id: u32, start_line: u32, start_col: u32, end_line: u32, end_col: u32 ) -> Self

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#### pub(crate) fn skipped_region( file_id: u32, start_line: u32, start_col: u32, end_line: u32, end_col: u32 ) -> Self

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#### pub(crate) fn gap_region( counter: Counter, file_id: u32, start_line: u32, start_col: u32, end_line: u32, end_col: u32 ) -> Self

## Trait Implementations§

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### impl Clone for CounterMappingRegion

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#### fn clone(&self) -> CounterMappingRegion

Returns a copy of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for CounterMappingRegion

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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### impl Copy for CounterMappingRegion

## Auto Trait Implementations§

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### impl DynSend for CounterMappingRegion

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### impl DynSync for CounterMappingRegion

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### impl Freeze for CounterMappingRegion

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### impl RefUnwindSafe for CounterMappingRegion

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### impl Send for CounterMappingRegion

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### impl Sync for CounterMappingRegion

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### impl Unpin for CounterMappingRegion

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### impl UnwindSafe for CounterMappingRegion

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment = _

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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#### fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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#### fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> Filterable for T

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#### fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<P> IntoQueryParam<P> for P

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#### fn into_query_param(self) -> P

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### impl<T> MaybeResult<T> for T

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#### type Error = !

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#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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### impl<T> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T> ToOwned for T
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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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### impl<'tcx, T> ToPredicate<'tcx, T> for T

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### impl<T, U> TryFrom<U> for T
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#### type Error = Infallible

The type returned in the event of a conversion error.
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Performs the conversion.
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### impl<T, U> TryInto<U> for T
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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<V, T> VZip<V> for T
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#### fn vzip(self) -> V

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### impl<Tcx, T> Value<Tcx> for T
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#### default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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### impl<'a, T> Captures<'a> for T
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where T: 'static,

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where T: Send + Sync,

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 44 bytes