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macro_rules! uint_enum { ($( #[$gattr:meta] )* pub enum $ty:ident { $( $( #[$attr:meta] )* $variant:ident = $val:expr,)* }) => { #[allow(missing_docs)] uint_enum!($( #[$gattr ])* (pub) enum $ty { $( $( #[$attr] )* $variant = $val, )* }); }; ($( #[$gattr:meta] )* enum $ty:ident { $( $( #[$attr:meta] )* $variant:ident = $val:expr,)* }) => { #[allow(missing_docs)] uint_enum!($( #[$gattr ])* () enum $ty { $( $( #[$attr] )* $variant = $val, )* }); }; ($( #[$gattr:meta] )* ( $($vis:tt)* ) enum $ty:ident { $( $( #[$attr:meta] )* $variant:ident = $val:expr,)* }) => { #[derive(Debug, Copy, Clone, PartialEq)] $( #[$gattr] )* #[allow(missing_docs)] $( $vis )* enum $ty { $( $( #[$attr ])* $variant = $val, )* } impl ::std::convert::TryFrom<u8> for $ty { type Error = (); fn try_from(n: u8) -> ::std::result::Result<$ty, ()> { match n { $( x if x == $ty::$variant as u8 => Ok($ty::$variant), )* _ => Err(()), } } } impl ::std::convert::TryFrom<u32> for $ty { type Error = (); fn try_from(n: u32) -> ::std::result::Result<$ty, ()> { match n { $( x if x == $ty::$variant as u32 => Ok($ty::$variant), )* _ => Err(()), } } } } } macro_rules! to_sql { ($target:ident, $( $ty:ty: ($variant:expr, $val:expr) ;)* ) => { $( impl crate::ToSql for $ty { fn to_sql(&self) -> crate::tds::codec::ColumnData<'_> { let $target = self; $variant(Some($val)) } } impl crate::ToSql for Option<$ty> { fn to_sql(&self) -> crate::tds::codec::ColumnData<'_> { match self { Some(val) => { let $target = val; $variant(Some($val)) }, None => $variant(None) } } } )* }; } macro_rules! from_sql { ($( $ty:ty: $($pat:pat => ($borrowed_val:expr, $owned_val:expr)),* );* ) => { $( impl<'a> crate::FromSql<'a> for $ty { fn from_sql(data: &'a crate::tds::codec::ColumnData<'static>) -> crate::Result<Option<Self>> { match data { $( $pat => Ok($borrowed_val), )* _ => Err(crate::Error::Conversion(format!("cannot interpret {:?} as an {} value", data, stringify!($ty)).into())) } } } impl crate::FromSqlOwned for $ty { fn from_sql_owned(data: crate::tds::codec::ColumnData<'static>) -> crate::Result<Option<Self>> { match data { $( $pat => Ok($owned_val), )* _ => Err(crate::Error::Conversion(format!("cannot interpret {:?} as an {} value", data, stringify!($ty)).into())) } } } )* }; ($( $ty:ty: $($pat:pat => $borrowed_val:expr),* );* ) => { $( impl<'a> crate::FromSql<'a> for $ty { fn from_sql(data: &'a crate::tds::codec::ColumnData<'static>) -> crate::Result<Option<Self>> { match data { $( $pat => Ok($borrowed_val), )* _ => Err(crate::Error::Conversion(format!("cannot interpret {:?} as an {} value", data, stringify!($ty)).into())) } } } impl crate::FromSqlOwned for $ty { fn from_sql_owned(data: crate::tds::codec::ColumnData<'static>) -> crate::Result<Option<Self>> { match data { $( $pat => Ok($borrowed_val), )* _ => Err(crate::Error::Conversion(format!("cannot interpret {:?} as an {} value", data, stringify!($ty)).into())) } } } )* }; }