Enum rustc_typeck::check::Diverges

pub enum Diverges {
    Maybe,
    Always,
    WarnedAlways,
}

🔬 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?

Tracks whether executing a node may exit normally (versus return/break/panic, which "diverge", leaving dead code in their wake). Tracked semi-automatically (through type variables marked as diverging), with some manual adjustments for control-flow primitives (approximating a CFG).

Variants

Maybe

🔬 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?

Potentially unknown, some cases converge, others require a CFG to determine them.

Always

🔬 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?

Definitely known to diverge and therefore not reach the next sibling or its parent.

WarnedAlways

🔬 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?

Same as Always but with a reachability warning already emitted

Methods

impl Diverges

fn always(self) -> bool

🔬 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?

Trait Implementations

impl Copy for Diverges

impl Clone for Diverges

fn clone(&self) -> Diverges

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Diverges

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

Formats the value using the given formatter.

impl PartialEq for Diverges

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

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

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Eq for Diverges

fn assert_receiver_is_total_eq(&self)

impl PartialOrd for Diverges

fn partial_cmp(&self, other: &Diverges) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use] fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use] fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use] fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use] fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for Diverges

fn cmp(&self, other: &Diverges) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl BitAnd for Diverges

type Output = Self

The resulting type after applying the & operator.

fn bitand(self, other: Self) -> Self

Performs the & operation.

impl BitOr for Diverges

type Output = Self

The resulting type after applying the | operator.

fn bitor(self, other: Self) -> Self

Performs the | operation.

impl BitAndAssign for Diverges

fn bitand_assign(&mut self, other: Self)

Performs the &= operation.

impl BitOrAssign for Diverges

fn bitor_assign(&mut self, other: Self)

Performs the |= operation.