Function prql_to_sql

prqlc/prqlc-macros/src/lib.rs:16–37

(input: TokenStream)

#[proc_macro]
pub fn prql_to_sql(input: TokenStream) -> TokenStream {
    let input: Expr = syn::parse(input).unwrap();

    let prql_string = match input {
        Expr::Lit(ExprLit {
            lit: Lit::Str(lit_str),
            ..
        }) => lit_str.value(),
        _ => panic!("prql_to_sql! proc macro expected a string"),
    };

    let opts = prqlc::Options::default().no_format().no_signature();

    let sql_string = match prqlc::compile(&prql_string, &opts) {
        Ok(r) => r,
        Err(err) => {
            panic!("{}", err);
        }
    };

    TokenStream::from_iter(vec![TokenTree::Literal(Literal::string(&sql_string))])
}