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use crate::records::variant::{
Variant1, Variant2, Variant3, Variant4, Variant5, Variant6, Variant7,
};
pub fn variant_get_if() {
// This file should not contain shared logic; the real translation is provided
// via the per-arity `get_if` methods generated below.
// The C++ method:
// template<typename T>
// const T* get_if() const
// maps to returning `Option<&T>` / `Option<&mut T>` in the Rust port.
// However, per the schedule, this specific one-shot item is the `const T*` version,
// so we return `Option<&T>`.
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static> Variant1<T0> {
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
// SAFETY:
// - In this port, VariantN stores the active alternative as a real value inside the enum.
// - `get_type_id::<T>()` guarantees the active variant matches `T`.
// - We can safely take a reference to the correct payload.
if tid == 0 {
self.get_if_0().and_then(|v| {
let r: &T = unsafe { &*(v as *const T0 as *const T) };
Some(r)
})
} else {
None
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static> Variant2<T0, T1> {
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static, T2: 'static> Variant3<T0, T1, T2> {
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
2 => self.get_if_2().and_then(|v2| {
let r: &T = unsafe { &*(v2 as *const T2 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static, T2: 'static, T3: 'static> Variant4<T0, T1, T2, T3> {
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
2 => self.get_if_2().and_then(|v2| {
let r: &T = unsafe { &*(v2 as *const T2 as *const T) };
Some(r)
}),
3 => self.get_if_3().and_then(|v3| {
let r: &T = unsafe { &*(v3 as *const T3 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static, T2: 'static, T3: 'static, T4: 'static> Variant5<T0, T1, T2, T3, T4> {
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
2 => self.get_if_2().and_then(|v2| {
let r: &T = unsafe { &*(v2 as *const T2 as *const T) };
Some(r)
}),
3 => self.get_if_3().and_then(|v3| {
let r: &T = unsafe { &*(v3 as *const T3 as *const T) };
Some(r)
}),
4 => self.get_if_4().and_then(|v4| {
let r: &T = unsafe { &*(v4 as *const T4 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static, T2: 'static, T3: 'static, T4: 'static, T5: 'static>
Variant6<T0, T1, T2, T3, T4, T5>
{
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
2 => self.get_if_2().and_then(|v2| {
let r: &T = unsafe { &*(v2 as *const T2 as *const T) };
Some(r)
}),
3 => self.get_if_3().and_then(|v3| {
let r: &T = unsafe { &*(v3 as *const T3 as *const T) };
Some(r)
}),
4 => self.get_if_4().and_then(|v4| {
let r: &T = unsafe { &*(v4 as *const T4 as *const T) };
Some(r)
}),
5 => self.get_if_5().and_then(|v5| {
let r: &T = unsafe { &*(v5 as *const T5 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}
/// Returns `Some(&T)` if the active alternative has type `T`, else `None`.
impl<T0: 'static, T1: 'static, T2: 'static, T3: 'static, T4: 'static, T5: 'static, T6: 'static>
Variant7<T0, T1, T2, T3, T4, T5, T6>
{
pub fn get_if<T: 'static>(&self) -> Option<&T> {
let tid = Self::get_type_id::<T>();
if tid < 0 {
return None;
}
if self.index() as i32 == tid {
match tid {
0 => self.get_if_0().and_then(|v0| {
let r: &T = unsafe { &*(v0 as *const T0 as *const T) };
Some(r)
}),
1 => self.get_if_1().and_then(|v1| {
let r: &T = unsafe { &*(v1 as *const T1 as *const T) };
Some(r)
}),
2 => self.get_if_2().and_then(|v2| {
let r: &T = unsafe { &*(v2 as *const T2 as *const T) };
Some(r)
}),
3 => self.get_if_3().and_then(|v3| {
let r: &T = unsafe { &*(v3 as *const T3 as *const T) };
Some(r)
}),
4 => self.get_if_4().and_then(|v4| {
let r: &T = unsafe { &*(v4 as *const T4 as *const T) };
Some(r)
}),
5 => self.get_if_5().and_then(|v5| {
let r: &T = unsafe { &*(v5 as *const T5 as *const T) };
Some(r)
}),
6 => self.get_if_6().and_then(|v6| {
let r: &T = unsafe { &*(v6 as *const T6 as *const T) };
Some(r)
}),
_ => None,
}
} else {
None
}
}
}