Struct LitBool 

pub struct LitBool {
    pub value: bool,
    pub span: Span,
}

A parsed boolean literal bundled with its source location.

true and false are identifier tokens in Rust’s token stream, not literal tokens. The FromLit implementation overrides FromLit::from_ident to handle them. FromLit::from_lit always returns an error.

Use LitBool when you need the span. Use bool when you only need the value.

Example

use litext::{litext, TokenStream};
use litext::literal::LitBool;

pub fn my_macro(input: TokenStream) -> TokenStream {
    let lit: LitBool = litext!(input as LitBool);
    if !lit.value() {
        return comperr::error(lit.span(), "feature must be enabled");
    }
    quote::quote! { /* use lit.value() */ }
}

Fields

value: bool

The parsed boolean value.

span: Span

The source location of the literal.

Implementations

impl LitBool

pub const fn new(value: bool, span: Span) -> Self

Creates a new LitBool from a value and a span.

pub const fn value(&self) -> bool

Returns the parsed boolean value.

pub const fn span(&self) -> Span

Returns the source span of the literal.

Trait Implementations

impl FromLit for LitBool

fn from_lit(lit: Literal) -> Result<Self, TokenStream>

Attempts to extract a value from a Literal token.

fn from_ident(ident: Ident) -> Result<Self, TokenStream>

Attempts to extract a value from an Ident token.

fn from_negative_lit(lit: Literal) -> Result<Self, TokenStream>

Attempts to extract a value from a negative Literal token.

impl ToTokens for LitBool

fn to_token_stream(&self) -> TokenStream

true and false are Ident tokens, not Literal tokens.