1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198

use crate::{
    optim::SimpleOptimizer,
    record::{PrecisionSettings, Record},
};
use burn_tensor::backend::Backend;
use core::any::Any;
use serde::{Deserialize, Serialize};

/// [Optimizer adaptor](crate::optim::simple::adaptor::OptimizerAdaptor) record item.
pub enum AdaptorRecordV1<O: SimpleOptimizer<B>, B: Backend> {
    /// Rank 0.
    Rank0(O::State<0>),

    /// Rank 1.
    Rank1(O::State<1>),

    /// Rank 2.
    Rank2(O::State<2>),

    /// Rank 3.
    Rank3(O::State<3>),

    /// Rank 4.
    Rank4(O::State<4>),

    /// Rank 5.
    Rank5(O::State<5>),

    /// Rank 6.
    Rank6(O::State<6>),

    /// Rank 7.
    Rank7(O::State<7>),

    /// Rank 8.
    Rank8(O::State<8>),
}

impl<O: SimpleOptimizer<B>, B: Backend> Clone for AdaptorRecordV1<O, B> {
    fn clone(&self) -> Self {
        match self {
            AdaptorRecordV1::Rank0(record) => AdaptorRecordV1::Rank0(record.clone()),
            AdaptorRecordV1::Rank1(record) => AdaptorRecordV1::Rank1(record.clone()),
            AdaptorRecordV1::Rank2(record) => AdaptorRecordV1::Rank2(record.clone()),
            AdaptorRecordV1::Rank3(record) => AdaptorRecordV1::Rank3(record.clone()),
            AdaptorRecordV1::Rank4(record) => AdaptorRecordV1::Rank4(record.clone()),
            AdaptorRecordV1::Rank5(record) => AdaptorRecordV1::Rank5(record.clone()),
            AdaptorRecordV1::Rank6(record) => AdaptorRecordV1::Rank6(record.clone()),
            AdaptorRecordV1::Rank7(record) => AdaptorRecordV1::Rank7(record.clone()),
            AdaptorRecordV1::Rank8(record) => AdaptorRecordV1::Rank8(record.clone()),
        }
    }
}

/// [Optimizer adaptor](crate::optim::simple::adaptor::OptimizerAdaptor) record item.
#[derive(Serialize, Deserialize)]
#[serde(bound = "")]
pub enum AdaptorRecordItemV1<O: SimpleOptimizer<B>, B: Backend, S: PrecisionSettings> {
    /// Rank 0.
    Rank0(<O::State<0> as Record<B>>::Item<S>),

    /// Rank 1.
    Rank1(<O::State<1> as Record<B>>::Item<S>),

    /// Rank 2.
    Rank2(<O::State<2> as Record<B>>::Item<S>),

    /// Rank 3.
    Rank3(<O::State<3> as Record<B>>::Item<S>),

    /// Rank 4.
    Rank4(<O::State<4> as Record<B>>::Item<S>),

    /// Rank 5.
    Rank5(<O::State<5> as Record<B>>::Item<S>),

    /// Rank 6.
    Rank6(<O::State<6> as Record<B>>::Item<S>),

    /// Rank 7.
    Rank7(<O::State<7> as Record<B>>::Item<S>),

    /// Rank 8.
    Rank8(<O::State<8> as Record<B>>::Item<S>),
}

impl<O, B> AdaptorRecordV1<O, B>
where
    O: SimpleOptimizer<B>,
    B: Backend,
{
    /// Convert the record into the state.
    ///
    /// # Returns
    ///
    /// The state.
    ///
    /// # Panics
    ///
    /// Panics if the state dimension is not supported.
    pub fn into_state<const D: usize>(self) -> O::State<D> {
        let boxed_state: Box<dyn Any> = match self {
            AdaptorRecordV1::Rank0(s) => Box::new(s),
            AdaptorRecordV1::Rank1(s) => Box::new(s),
            AdaptorRecordV1::Rank2(s) => Box::new(s),
            AdaptorRecordV1::Rank3(s) => Box::new(s),
            AdaptorRecordV1::Rank4(s) => Box::new(s),
            AdaptorRecordV1::Rank5(s) => Box::new(s),
            AdaptorRecordV1::Rank6(s) => Box::new(s),
            AdaptorRecordV1::Rank7(s) => Box::new(s),
            AdaptorRecordV1::Rank8(s) => Box::new(s),
        };
        let state = boxed_state
            .downcast::<O::State<D>>()
            .expect("Unsupported state dimension, dimension up to 8 are supported.");
        *state
    }

    /// Convert the state into the record.
    ///
    /// # Arguments
    ///
    /// * `state`: The state.
    ///
    /// # Returns
    ///
    /// The record.
    pub fn from_state<const D: usize>(state: O::State<D>) -> Self {
        let state: Box<dyn Any> = Box::new(state);

        match D {
            0 => AdaptorRecordV1::Rank0(*state.downcast().unwrap()),
            1 => AdaptorRecordV1::Rank1(*state.downcast().unwrap()),
            2 => AdaptorRecordV1::Rank2(*state.downcast().unwrap()),
            3 => AdaptorRecordV1::Rank3(*state.downcast().unwrap()),
            4 => AdaptorRecordV1::Rank4(*state.downcast().unwrap()),
            5 => AdaptorRecordV1::Rank5(*state.downcast().unwrap()),
            6 => AdaptorRecordV1::Rank6(*state.downcast().unwrap()),
            7 => AdaptorRecordV1::Rank7(*state.downcast().unwrap()),
            8 => AdaptorRecordV1::Rank8(*state.downcast().unwrap()),
            _ => panic!("Unsupported state dimension, dimension up to 8 are supported."),
        }
    }
}

impl<O, B> Record<B> for AdaptorRecordV1<O, B>
where
    O: SimpleOptimizer<B>,
    B: Backend,
{
    type Item<S: PrecisionSettings> = AdaptorRecordItemV1<O, B, S>;

    fn into_item<S: PrecisionSettings>(self) -> Self::Item<S> {
        match self {
            AdaptorRecordV1::Rank0(record) => AdaptorRecordItemV1::Rank0(record.into_item()),
            AdaptorRecordV1::Rank1(record) => AdaptorRecordItemV1::Rank1(record.into_item()),
            AdaptorRecordV1::Rank2(record) => AdaptorRecordItemV1::Rank2(record.into_item()),
            AdaptorRecordV1::Rank3(record) => AdaptorRecordItemV1::Rank3(record.into_item()),
            AdaptorRecordV1::Rank4(record) => AdaptorRecordItemV1::Rank4(record.into_item()),
            AdaptorRecordV1::Rank5(record) => AdaptorRecordItemV1::Rank5(record.into_item()),
            AdaptorRecordV1::Rank6(record) => AdaptorRecordItemV1::Rank6(record.into_item()),
            AdaptorRecordV1::Rank7(record) => AdaptorRecordItemV1::Rank7(record.into_item()),
            AdaptorRecordV1::Rank8(record) => AdaptorRecordItemV1::Rank8(record.into_item()),
        }
    }

    fn from_item<S: PrecisionSettings>(item: Self::Item<S>, device: &B::Device) -> Self {
        match item {
            AdaptorRecordItemV1::Rank0(item) => {
                AdaptorRecordV1::Rank0(<O::State<0> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank1(item) => {
                AdaptorRecordV1::Rank1(<O::State<1> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank2(item) => {
                AdaptorRecordV1::Rank2(<O::State<2> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank3(item) => {
                AdaptorRecordV1::Rank3(<O::State<3> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank4(item) => {
                AdaptorRecordV1::Rank4(<O::State<4> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank5(item) => {
                AdaptorRecordV1::Rank5(<O::State<5> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank6(item) => {
                AdaptorRecordV1::Rank6(<O::State<6> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank7(item) => {
                AdaptorRecordV1::Rank7(<O::State<7> as Record<B>>::from_item(item, device))
            }
            AdaptorRecordItemV1::Rank8(item) => {
                AdaptorRecordV1::Rank8(<O::State<8> as Record<B>>::from_item(item, device))
            }
        }
    }
}