Enum WarningKind 

pub enum WarningKind {
    UnusedVariable(String),
    UnusedFunction(String),
    UnreachableCode,
    UnreachablePattern(String),
    ComptimeDbgPresent(String),
}

The kind of compilation warning.

Variants

UnusedVariable(String)

A variable was declared but never used.

UnusedFunction(String)

A function was declared but never called.

UnreachableCode

Code that will never be executed.

UnreachablePattern(String)

A pattern that will never be matched because a previous pattern already covers it.

ComptimeDbgPresent(String)

A comptime-evaluated @dbg call was present during compilation.

Implementations

impl WarningKind

pub fn unused_variable_name(&self) -> Option<&str>

Returns the variable name if this is an UnusedVariable warning.

pub fn format_with_line(&self, line_number: Option<usize>) -> String

Format the warning message with an optional line number.

When line_number is Some, the line number is appended to the message for warnings that have a name (like unused variables). This helps disambiguate when multiple variables share the same name.

Trait Implementations

impl Clone for WarningKind

fn clone(&self) -> WarningKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WarningKind

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

Formats the value using the given formatter.

impl Display for WarningKind

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

Formats the value using the given formatter.

impl Error for WarningKind

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl PartialEq for WarningKind

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for WarningKind

impl StructuralPartialEq for WarningKind