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Remove obsolete doc section

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`FromSql` / `ToSql` are now implemented for i64 and usize
This commit is contained in:
gwenn 2020-11-22 09:37:52 +01:00
parent 32ee895b63
commit 3aeb5d7e08
1 changed files with 0 additions and 10 deletions
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src/types/from_sql.rs
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@ -76,16 +76,6 @@ impl Error for FromSqlError {
pub type FromSqlResult<T> = Result<T, FromSqlError>; pub type FromSqlResult<T> = Result<T, FromSqlError>;
/// A trait for types that can be created from a SQLite value. /// A trait for types that can be created from a SQLite value.
///
/// Note that `FromSql` and `ToSql` are defined for most integral types, but
/// not `u64` or `usize`. This is intentional; SQLite returns integers as
/// signed 64-bit values, which cannot fully represent the range of these
/// types. Rusqlite would have to
/// decide how to handle negative values: return an error or reinterpret as a
/// very large postive numbers, neither of which
/// is guaranteed to be correct for everyone. Callers can work around this by
/// fetching values as i64 and then doing the interpretation themselves or by
/// defining a newtype and implementing `FromSql`/`ToSql` for it.
pub trait FromSql: Sized { pub trait FromSql: Sized {
/// Converts SQLite value into Rust value. /// Converts SQLite value into Rust value.
fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self>; fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self>;