INNER CODE UNIT · Rust

into_literal

rusqlite/rusqlite · rusqlite-macros/src/lib.rs:77

fn into_literal(ts: &TokenTree) -> Option<Literal> {
    match ts {
        TokenTree::Literal(l) => Some(l.clone()),
        TokenTree::Group(g) => match g.delimiter() {
            Delimiter::None => match g.stream().into_iter().collect::<Vec<_>>().as_slice() {
                [TokenTree::Literal(l)] => Some(l.clone()),
                _ => None,
            },
            Delimiter::Parenthesis | Delimiter::Brace | Delimiter::Bracket => None,
        },
        _ => None,
    }
}

fn respan(ts: TokenStream, span: Span) -> TokenStream {
    let mut res = TokenStream::new();
    for tt in ts {
        let tt = match tt {

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