Enum rustc_hir::hir::ParamName

pub enum ParamName {
    Plain(Ident),
    Fresh(usize),
    Error,
}

Variants

Plain(Ident)

Some user-given name like T or 'x.

Fresh(usize)

Synthetic name generated when user elided a lifetime in an impl header.

E.g., the lifetimes in cases like these:

impl Foo for &u32
impl Foo<'_> for u32

in that case, we rewrite to

impl<'f> Foo for &'f u32
impl<'f> Foo<'f> for u32

where 'f is something like Fresh(0). The indices are unique per impl, but not necessarily continuous.

Error

Indicates an illegal name was given and an error has been reported (so we should squelch other derived errors). Occurs when, e.g., '_ is used in the wrong place.

Implementations

impl ParamName

pub fn ident(&self) -> Ident

pub fn normalize_to_macros_2_0(&self) -> ParamName

Trait Implementations

impl Clone for ParamName

pub fn clone(&self) -> ParamName

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ParamName

impl Debug for ParamName

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

Formats the value using the given formatter.

impl<__E: Encoder> Encodable<__E> for ParamName

pub fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl Eq for ParamName

impl Hash for ParamName

pub fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<__CTX> HashStable<__CTX> for ParamName where
    __CTX: HashStableContext, 

pub fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

impl PartialEq<ParamName> for ParamName

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

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

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

This method tests for !=.

impl StructuralEq for ParamName

impl StructuralPartialEq for ParamName