Struct Enabled 

#[non_exhaustive]
pub struct Enabled {}

Token indicating that beta feature(s) are or can be enabled

When adding a new beta feature:

• Put an instance of beta::Enabled in the appropriate piece of parsed template syntax, For example, in the SubstDetails along with the O:: markers.

• When parsing, obtain the value from Enabled::new_for_syntax.

• Add a test case to tests/minimal-ui/disabled.rs which omits the beta_deftly option, and therefore fails, thus demonstrating that the feature gate works as intended.

Implementations

impl Enabled

pub fn new_for_dd_option(_: Span) -> Result<Self>

If the cargo feature is enabled, return Ok(Enabled)

Used when parsing the beta_deftly template option.

pub fn new_for_modules_feature(_: Span) -> Result<Self>

If the cargo feature is enabled, return Ok(Enabled)

Used for things that are inherently part of the modules feature, such as uses and define_derive_deftly_module!.

pub fn new_for_imported_definitions() -> Result<Enabled, &'static (dyn Fn(Span) -> Error + 'static)>

If the cargo feature is enabled, return Some.

Used when parsing template text imported from modules.

The rule is that modules have their own beta_deftly option, and beta features are allowed in module text iff the module enabled them. The importing template doesn’t need to.

pub fn new_for_syntax(span: Span) -> Result<Self>

If the beta_deftly template feature is enabled, return Ok(Enabled)

Used when parsing beta syntax, in templates.

Trait Implementations

impl Clone for Enabled

fn clone(&self) -> Enabled

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Enabled

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

Formats the value using the given formatter.

impl PartialEq for Enabled

fn eq(&self, other: &Enabled) -> 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 Copy for Enabled

impl Eq for Enabled

impl StructuralPartialEq for Enabled