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 to_token(&self) -> Token

Losslessly convert an AST literal into a token.

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<__D: Decoder> Decodable<__D> for Lit

fn decode(__decoder: &mut __D) -> Self

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

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

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

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

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes