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use std::mem;
use super::value::ProtobufValue;
use crate::singular::*;
pub trait ReflectOptional: 'static {
fn to_option(&self) -> Option<&dyn ProtobufValue>;
fn set_value(&mut self, value: &dyn ProtobufValue);
}
impl<V: ProtobufValue + Clone + 'static> ReflectOptional for Option<V> {
fn to_option(&self) -> Option<&dyn ProtobufValue> {
self.as_ref().map(|v| v as &dyn ProtobufValue)
}
fn set_value(&mut self, value: &dyn ProtobufValue) {
match value.as_any().downcast_ref::<V>() {
Some(v) => mem::replace(self, Some(v.clone())),
None => panic!(),
};
}
}
impl<V: ProtobufValue + Clone + 'static> ReflectOptional for SingularField<V> {
fn to_option(&self) -> Option<&dyn ProtobufValue> {
self.as_ref().map(|v| v as &dyn ProtobufValue)
}
fn set_value(&mut self, value: &dyn ProtobufValue) {
match value.as_any().downcast_ref::<V>() {
Some(v) => mem::replace(self, SingularField::some(v.clone())),
None => panic!(),
};
}
}
impl<V: ProtobufValue + Clone + 'static> ReflectOptional for SingularPtrField<V> {
fn to_option(&self) -> Option<&dyn ProtobufValue> {
self.as_ref().map(|v| v as &dyn ProtobufValue)
}
fn set_value(&mut self, value: &dyn ProtobufValue) {
match value.as_any().downcast_ref::<V>() {
Some(v) => mem::replace(self, SingularPtrField::some(v.clone())),
None => panic!(),
};
}
}
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