Macro expr::scalar::func::macros::sqlfunc

macro_rules! sqlfunc {
    (fn $fn_name : ident $($tail : tt) *) => { ... };
    (#[sqlname = $name : expr] fn $fn_name : ident $($tail : tt) *) => { ... };
    (#[sqlname = $name : expr]
 #[preserves_uniqueness = $preserves_uniqueness : expr] fn $fn_name :
 ident($($params : tt) *) $($tail : tt) *) => { ... };
    (#[sqlname = $name : expr]
 #[preserves_uniqueness = $preserves_uniqueness : expr] fn $fn_name : ident <
 $lt : lifetime > (mut $param_name : ident : $input_ty : ty) -> $output_ty :
 ty $body : block) => { ... };
    (#[sqlname = $name : expr]
 #[preserves_uniqueness = $preserves_uniqueness : expr] fn $fn_name : ident <
 $lt : lifetime > ($param_name : ident : $input_ty : ty) -> $output_ty : ty
 $body : block) => { ... };
}