pub enum InstrumentCoverage {
Expand description

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 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.




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



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



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



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

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

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Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.


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