Struct rustc_ast::ast::Lit

pub struct Lit {
    pub token: Lit,
    pub kind: LitKind,
    pub span: Span,
}

An AST literal.

Fields

token: Lit

The original literal token as written in source code.

kind: LitKind

The "semantic" representation of the literal lowered from the original tokens. Strings are unescaped, hexadecimal forms are eliminated, etc. FIXME: Remove this and only create the semantic representation during lowering to HIR.

span: Span

Implementations

impl Lit

pub fn from_lit_token(token: Lit, span: Span) -> Result<Lit, LitError>

Converts literal token into an AST literal.

pub fn from_token(token: &Token) -> Result<Lit, LitError>

Converts arbitrary token into an AST literal.

Keep this in sync with Token::can_begin_literal_or_bool excluding unary negation.

pub fn from_lit_kind(kind: LitKind, span: Span) -> Lit

Attempts to recover an AST literal from semantic literal. This function is used when the original token doesn't exist (e.g. the literal is created by an AST-based macro) or unavailable (e.g. from HIR pretty-printing).

pub fn token_tree(&self) -> TokenTree

Losslessly convert an AST literal into a token stream.

Trait Implementations

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 Debug for Lit

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

Formats the value using the given formatter.

impl Decodable for Lit

fn decode<__D: Decoder>(d: &mut __D) -> Result<Lit, __D::Error>

impl Encodable for Lit

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>

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

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