132 lines
3.7 KiB
Rust
132 lines
3.7 KiB
Rust
#[macro_export]
|
|
macro_rules! query_def_type {
|
|
(@ ($type:ty)) => {
|
|
$type
|
|
};
|
|
(@ 'dyn ($type:ty)) => {
|
|
$type
|
|
};
|
|
(@ 'vec ($type:ty)) => {
|
|
Vec<$type>
|
|
};
|
|
(@ 'map ($key:ty, $value:ty)) => {
|
|
::std::collections::HashMap<$key, $value>
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! query_def_field {
|
|
(@dyn $type:ty) => {
|
|
Option<<$type as $crate::DynamicQuery>::Definition>
|
|
};
|
|
(@ ($type:ty)) => {
|
|
bool
|
|
};
|
|
(@ 'dyn ($type:ty)) => {
|
|
$crate::query_def_field!(@dyn $type)
|
|
};
|
|
(@ 'vec ($type:ty)) => {
|
|
$crate::query_def_field!(@dyn $type)
|
|
};
|
|
(@ 'map ($key:ty, $value:ty)) => {
|
|
$crate::query_def_field!(@dyn $value)
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! query_def_filter {
|
|
// note about this: 'dyn is implied for 'vec and 'map because if the type is not 'dyn, then the
|
|
// special handling is not necessary in the first place.
|
|
(@ $query:expr, $value:ident, 'vec ($_type:path)) => {
|
|
match $query {
|
|
Some(query) => {
|
|
if let Some(ref mut value) = $value {
|
|
for value in value.iter_mut() {
|
|
value.filter_ref(&query);
|
|
}
|
|
}
|
|
}
|
|
None => {
|
|
*$value = None;
|
|
}
|
|
}
|
|
};
|
|
(@ $query:expr, $value:ident, 'map ($_key:path, $_value:path)) => {
|
|
match $query {
|
|
Some(query) => {
|
|
if let Some(ref mut value) = $value {
|
|
for (_, value) in value.iter_mut() {
|
|
value.filter_ref(&query);
|
|
}
|
|
}
|
|
}
|
|
None => {
|
|
*$value = None;
|
|
}
|
|
}
|
|
};
|
|
(@ $query:expr, $value:ident, 'dyn ($($_type:tt)+)) => {
|
|
if let Some(ref mut value) = $value {
|
|
if let Some(ref query) = $query {
|
|
value.filter_ref(&query);
|
|
}
|
|
}
|
|
};
|
|
(@ $query:expr, $value:ident, ($($_type:tt)+)) => {
|
|
if !*$query {
|
|
*$value = None;
|
|
}
|
|
};
|
|
}
|
|
|
|
/// Defines a dynamic query structure.
|
|
#[macro_export]
|
|
macro_rules! query_def {
|
|
(
|
|
$($vis:vis $data:ident($def:ident) {
|
|
$(
|
|
$(#[$field_meta:meta])
|
|
*
|
|
$field:ident: $($qualifier:lifetime)? ($($type:tt)+),
|
|
)+
|
|
})
|
|
*
|
|
) => {
|
|
$(
|
|
#[derive(Debug, Clone)]
|
|
#[cfg_attr(feature = "serde", derive(::serde::Serialize, ::serde::Deserialize))]
|
|
$vis struct $data {
|
|
$(
|
|
#[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
|
|
$(#[$field_meta])
|
|
*
|
|
pub $field: Option<$crate::query_def_type!(@ $($qualifier)? ($($type)+))>,
|
|
)+
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
#[cfg_attr(feature = "serde", derive(::serde::Serialize, ::serde::Deserialize))]
|
|
$vis struct $def {
|
|
$(
|
|
#[cfg_attr(feature = "serde", serde(default))]
|
|
pub $field: $crate::query_def_field!(@ $($qualifier)? ($($type)+)),
|
|
)+
|
|
}
|
|
|
|
impl $crate::DynamicQuery for $data {
|
|
type Definition = $def;
|
|
|
|
fn filter_ref(&mut self, def: &Self::Definition) {
|
|
$(
|
|
let query = &def.$field;
|
|
let value = &mut self.$field;
|
|
$crate::query_def_filter!(@ query, value, $($qualifier)? ($($type)+));
|
|
)
|
|
+
|
|
}
|
|
}
|
|
)
|
|
*
|
|
};
|
|
}
|