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Merge remote-tracking branch 'jgallagher/master' into vtab

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This commit is contained in:
gwenn 2018-05-12 15:31:16 +02:00
commit f4beb18904
1 changed files with 27 additions and 5 deletions
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32
src/types/to_sql.rs
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@ -15,6 +15,8 @@ pub enum ToSqlOutput<'a> {
ZeroBlob(i32),
}
// Generically allow any type that can be converted into a ValueRef
// to be converted into a ToSqlOutput as well.
impl<'a, T: ?Sized> From<&'a T> for ToSqlOutput<'a>
where &'a T: Into<ValueRef<'a>>
{
@ -23,11 +25,31 @@ impl<'a, T: ?Sized> From<&'a T> for ToSqlOutput<'a>
}
}
impl<'a, T: Into<Value>> From<T> for ToSqlOutput<'a> {
fn from(t: T) -> Self {
ToSqlOutput::Owned(t.into())
}
}
// We cannot also generically allow any type that can be converted
// into a Value to be converted into a ToSqlOutput because of
// coherence rules (https://github.com/rust-lang/rust/pull/46192),
// so we'll manually implement it for all the types we know can
// be converted into Values.
macro_rules! from_value(
($t:ty) => (
impl<'a> From<$t> for ToSqlOutput<'a> {
fn from(t: $t) -> Self { ToSqlOutput::Owned(t.into())}
}
)
);
from_value!(String);
from_value!(Null);
from_value!(bool);
from_value!(i8);
from_value!(i16);
from_value!(i32);
from_value!(i64);
from_value!(isize);
from_value!(u8);
from_value!(u16);
from_value!(u32);
from_value!(f64);
from_value!(Vec<u8>);
impl<'a> ToSql for ToSqlOutput<'a> {
fn to_sql(&self) -> Result<ToSqlOutput> {