Enum syn::Lit

pub enum Lit {
    Str(LitStr),
    ByteStr(LitByteStr),
    Byte(LitByte),
    Char(LitChar),
    Int(LitInt),
    Float(LitFloat),
    Bool(LitBool),
    Verbatim(LitVerbatim),
}

A Rust literal such as a string or integer or boolean.

This type is available if Syn is built with the "derive" or "full" feature.

Syntax tree enum

This type is a syntax tree enum.

Variants

Str(LitStr)

A UTF-8 string literal: "foo".

This type is available if Syn is built with the "derive" or "full" feature.

ByteStr(LitByteStr)

A byte string literal: b"foo".

This type is available if Syn is built with the "derive" or "full" feature.

Byte(LitByte)

A byte literal: b'f'.

This type is available if Syn is built with the "derive" or "full" feature.

Char(LitChar)

A character literal: 'a'.

This type is available if Syn is built with the "derive" or "full" feature.

Int(LitInt)

An integer literal: 1 or 1u16.

Holds up to 64 bits of data. Use LitVerbatim for any larger integer literal.

This type is available if Syn is built with the "derive" or "full" feature.

Float(LitFloat)

A floating point literal: 1f64 or 1.0e10f64.

Must be finite. May not be infinte or NaN.

This type is available if Syn is built with the "derive" or "full" feature.

Bool(LitBool)

A boolean literal: true or false.

This type is available if Syn is built with the "derive" or "full" feature.

Verbatim(LitVerbatim)

A raw token literal not interpreted by Syn, possibly because it represents an integer larger than 64 bits.

This type is available if Syn is built with the "derive" or "full" feature.

Methods

impl Lit

pub fn new(token: Literal) -> Self

Interpret a Syn literal from a proc-macro2 literal.

Not all proc-macro2 literals are valid Syn literals. In particular, doc comments are considered by proc-macro2 to be literals but in Syn they are Attribute.

Panics

Panics if the input is a doc comment literal.

Trait Implementations

impl Token for Lit

fn peek(cursor: Cursor) -> bool

fn display() -> &'static str

impl Parse for Lit

fn parse(input: ParseStream) -> Result<Self>

impl PartialEq<Lit> for Lit

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

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

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

This method tests for !=.

impl Clone for Lit

fn clone(&self) -> Lit

Returns a copy of the value.

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

Performs copy-assignment from source.

impl From<Lit> for NestedMeta

fn from(e: Lit) -> NestedMeta

Performs the conversion.

impl From<LitStr> for Lit

fn from(e: LitStr) -> Lit

Performs the conversion.

impl From<LitByteStr> for Lit

fn from(e: LitByteStr) -> Lit

Performs the conversion.

impl From<LitByte> for Lit

fn from(e: LitByte) -> Lit

Performs the conversion.

impl From<LitChar> for Lit

fn from(e: LitChar) -> Lit

Performs the conversion.

impl From<LitInt> for Lit

fn from(e: LitInt) -> Lit

Performs the conversion.

impl From<LitFloat> for Lit

fn from(e: LitFloat) -> Lit

Performs the conversion.

impl From<LitBool> for Lit

fn from(e: LitBool) -> Lit

Performs the conversion.

impl From<LitVerbatim> for Lit

fn from(e: LitVerbatim) -> Lit

Performs the conversion.

impl Eq for Lit

impl Debug for Lit

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

Formats the value using the given formatter.

impl Hash for Lit

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, 

Feeds a slice of this type into the given [Hasher].

impl ToTokens for Lit

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn into_token_stream(self) -> TokenStream

Convert self directly into a TokenStream object.