Enum rustc_session::config::InstrumentCoverage

pub enum InstrumentCoverage {
    All,
    ExceptUnusedGenerics,
    ExceptUnusedFunctions,
    Off,
}

The different settings that the -C instrument-coverage flag can have.

Coverage instrumentation now supports combining -C instrument-coverage with compiler and linker optimization (enabled with -O or -C opt-level=1 and higher). Nevertheless, there are many variables, depending on options selected, code structure, and enabled attributes. If errors are encountered, either while compiling or when generating llvm-cov show reports, consider lowering the optimization level, including or excluding -C link-dead-code, or using -Zunstable-options -C instrument-coverage=except-unused-functions or -Zunstable-options -C instrument-coverage=except-unused-generics.

Note that ExceptUnusedFunctions means: When mapgen.rs generates the coverage map, it will not attempt to generate synthetic functions for unused (and not code-generated) functions (whether they are generic or not). As a result, non-codegenned functions will not be included in the coverage map, and will not appear, as covered or uncovered, in coverage reports.

ExceptUnusedGenerics will add synthetic functions to the coverage map, unless the function has type parameters.

Variants

All

Default -C instrument-coverage or -C instrument-coverage=statement

ExceptUnusedGenerics

-Zunstable-options -C instrument-coverage=except-unused-generics

ExceptUnusedFunctions

-Zunstable-options -C instrument-coverage=except-unused-functions

Off

-C instrument-coverage=off (or no, etc.)

Trait Implementations

impl Clone for InstrumentCoverage

fn clone(&self) -> InstrumentCoverage

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InstrumentCoverage

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

Formats the value using the given formatter.

impl DepTrackingHash for InstrumentCoverage

fn hash(
    &self,
    hasher: &mut DefaultHasher,
    _: ErrorOutputType,
    _for_crate_hash: bool
)

impl Hash for InstrumentCoverage

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<InstrumentCoverage> for InstrumentCoverage

fn eq(&self, other: &InstrumentCoverage) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for InstrumentCoverage

impl StructuralPartialEq for InstrumentCoverage

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: 1 byte

Size for each variant:

• All: 0 bytes
• ExceptUnusedGenerics: 0 bytes
• ExceptUnusedFunctions: 0 bytes
• Off: 0 bytes