Struct CustomProcMacroExpander

pub struct CustomProcMacroExpander { /* private fields */ }

A custom proc-macro expander handle. This handle together with its crate resolves to a ProcMacro

Implementations

impl CustomProcMacroExpander

pub fn new(proc_macro_id: u32) -> Self

pub const fn missing_expander() -> Self

An expander that always errors due to the actual proc-macro expander missing.

pub const fn disabled() -> Self

A dummy expander that always errors. This expander is used for macros that have been disabled.

pub const fn disabled_proc_attr() -> Self

A dummy expander that always errors. This expander is used for attribute macros when proc-macro attribute expansion is disabled.

pub const fn is_missing(&self) -> bool

The macro-expander is missing or has yet to be build.

pub const fn is_disabled(&self) -> bool

The macro is explicitly disabled and cannot be expanded.

pub const fn is_disabled_proc_attr(&self) -> bool

The macro is explicitly disabled due to proc-macro attribute expansion being disabled.

pub fn as_expand_error(&self, def_crate: CrateId) -> Option<ExpandErrorKind>

The macro is explicitly disabled due to proc-macro attribute expansion being disabled.

pub fn expand( self, db: &dyn ExpandDatabase, def_crate: CrateId, calling_crate: CrateId, tt: &Subtree, attr_arg: Option<&Subtree>, def_site: Span, call_site: Span, mixed_site: Span, ) -> ExpandResult<Subtree>

Trait Implementations

impl Clone for CustomProcMacroExpander

fn clone(&self) -> CustomProcMacroExpander

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CustomProcMacroExpander

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

Formats the value using the given formatter.

impl Hash for CustomProcMacroExpander

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 for CustomProcMacroExpander

fn eq(&self, other: &CustomProcMacroExpander) -> 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 CustomProcMacroExpander

impl Eq for CustomProcMacroExpander

impl StructuralPartialEq for CustomProcMacroExpander