Function literal_ty 

pub(crate) fn literal_ty<'db>(
    interner: DbInterner<'db>,
    value: &Literal,
    default_int: impl FnOnce(&DefaultAny<'db>) -> Ty<'db>,
    default_uint: impl FnOnce(&DefaultAny<'db>) -> Ty<'db>,
    default_float: impl FnOnce(&DefaultAny<'db>) -> Ty<'db>,
) -> Ty<'db>