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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
use std::borrow::Cow;

use serde::ser::SerializeSeq;
use serde::{Deserialize, Serialize};

use crate::{
    PartialResultParams, Range, StaticRegistrationOptions, TextDocumentIdentifier,
    TextDocumentRegistrationOptions, WorkDoneProgressOptions, WorkDoneProgressParams,
};
/// A set of predefined token types. This set is not fixed
/// and clients can specify additional token types via the
/// corresponding client capabilities.
///
/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Hash, PartialOrd, Clone, Deserialize, Serialize)]
pub struct SemanticTokenType(Cow<'static, str>);

impl SemanticTokenType {
    pub const NAMESPACE: SemanticTokenType = SemanticTokenType::new("namespace");
    pub const TYPE: SemanticTokenType = SemanticTokenType::new("type");
    pub const CLASS: SemanticTokenType = SemanticTokenType::new("class");
    pub const ENUM: SemanticTokenType = SemanticTokenType::new("enum");
    pub const INTERFACE: SemanticTokenType = SemanticTokenType::new("interface");
    pub const STRUCT: SemanticTokenType = SemanticTokenType::new("struct");
    pub const TYPE_PARAMETER: SemanticTokenType = SemanticTokenType::new("typeParameter");
    pub const PARAMETER: SemanticTokenType = SemanticTokenType::new("parameter");
    pub const VARIABLE: SemanticTokenType = SemanticTokenType::new("variable");
    pub const PROPERTY: SemanticTokenType = SemanticTokenType::new("property");
    pub const ENUM_MEMBER: SemanticTokenType = SemanticTokenType::new("enumMember");
    pub const EVENT: SemanticTokenType = SemanticTokenType::new("event");
    pub const FUNCTION: SemanticTokenType = SemanticTokenType::new("function");
    pub const METHOD: SemanticTokenType = SemanticTokenType::new("method");
    pub const MACRO: SemanticTokenType = SemanticTokenType::new("macro");
    pub const KEYWORD: SemanticTokenType = SemanticTokenType::new("keyword");
    pub const MODIFIER: SemanticTokenType = SemanticTokenType::new("modifier");
    pub const COMMENT: SemanticTokenType = SemanticTokenType::new("comment");
    pub const STRING: SemanticTokenType = SemanticTokenType::new("string");
    pub const NUMBER: SemanticTokenType = SemanticTokenType::new("number");
    pub const REGEXP: SemanticTokenType = SemanticTokenType::new("regexp");
    pub const OPERATOR: SemanticTokenType = SemanticTokenType::new("operator");

    /// @since 3.17.0
    pub const DECORATOR: SemanticTokenType = SemanticTokenType::new("decorator");

    pub const fn new(tag: &'static str) -> Self {
        SemanticTokenType(Cow::Borrowed(tag))
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }
}

impl From<String> for SemanticTokenType {
    fn from(from: String) -> Self {
        SemanticTokenType(Cow::from(from))
    }
}

impl From<&'static str> for SemanticTokenType {
    fn from(from: &'static str) -> Self {
        SemanticTokenType::new(from)
    }
}

/// A set of predefined token modifiers. This set is not fixed
/// and clients can specify additional token types via the
/// corresponding client capabilities.
///
/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Hash, PartialOrd, Clone, Deserialize, Serialize)]
pub struct SemanticTokenModifier(Cow<'static, str>);

impl SemanticTokenModifier {
    pub const DECLARATION: SemanticTokenModifier = SemanticTokenModifier::new("declaration");
    pub const DEFINITION: SemanticTokenModifier = SemanticTokenModifier::new("definition");
    pub const READONLY: SemanticTokenModifier = SemanticTokenModifier::new("readonly");
    pub const STATIC: SemanticTokenModifier = SemanticTokenModifier::new("static");
    pub const DEPRECATED: SemanticTokenModifier = SemanticTokenModifier::new("deprecated");
    pub const ABSTRACT: SemanticTokenModifier = SemanticTokenModifier::new("abstract");
    pub const ASYNC: SemanticTokenModifier = SemanticTokenModifier::new("async");
    pub const MODIFICATION: SemanticTokenModifier = SemanticTokenModifier::new("modification");
    pub const DOCUMENTATION: SemanticTokenModifier = SemanticTokenModifier::new("documentation");
    pub const DEFAULT_LIBRARY: SemanticTokenModifier = SemanticTokenModifier::new("defaultLibrary");

    pub const fn new(tag: &'static str) -> Self {
        SemanticTokenModifier(Cow::Borrowed(tag))
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }
}

impl From<String> for SemanticTokenModifier {
    fn from(from: String) -> Self {
        SemanticTokenModifier(Cow::from(from))
    }
}

impl From<&'static str> for SemanticTokenModifier {
    fn from(from: &'static str) -> Self {
        SemanticTokenModifier::new(from)
    }
}

#[derive(Debug, Eq, PartialEq, Hash, PartialOrd, Clone, Deserialize, Serialize)]
pub struct TokenFormat(Cow<'static, str>);

impl TokenFormat {
    pub const RELATIVE: TokenFormat = TokenFormat::new("relative");

    pub const fn new(tag: &'static str) -> Self {
        TokenFormat(Cow::Borrowed(tag))
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }
}

impl From<String> for TokenFormat {
    fn from(from: String) -> Self {
        TokenFormat(Cow::from(from))
    }
}

impl From<&'static str> for TokenFormat {
    fn from(from: &'static str) -> Self {
        TokenFormat::new(from)
    }
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensLegend {
    /// The token types a server uses.
    pub token_types: Vec<SemanticTokenType>,

    /// The token modifiers a server uses.
    pub token_modifiers: Vec<SemanticTokenModifier>,
}

/// The actual tokens.
#[derive(Debug, Eq, PartialEq, Copy, Clone, Default)]
pub struct SemanticToken {
    pub delta_line: u32,
    pub delta_start: u32,
    pub length: u32,
    pub token_type: u32,
    pub token_modifiers_bitset: u32,
}

impl SemanticToken {
    fn deserialize_tokens<'de, D>(deserializer: D) -> Result<Vec<SemanticToken>, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let data = Vec::<u32>::deserialize(deserializer)?;
        let chunks = data.chunks_exact(5);

        if !chunks.remainder().is_empty() {
            return Result::Err(serde::de::Error::custom("Length is not divisible by 5"));
        }

        Result::Ok(
            chunks
                .map(|chunk| SemanticToken {
                    delta_line: chunk[0],
                    delta_start: chunk[1],
                    length: chunk[2],
                    token_type: chunk[3],
                    token_modifiers_bitset: chunk[4],
                })
                .collect(),
        )
    }

    fn serialize_tokens<S>(tokens: &[SemanticToken], serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        let mut seq = serializer.serialize_seq(Some(tokens.len() * 5))?;
        for token in tokens.iter() {
            seq.serialize_element(&token.delta_line)?;
            seq.serialize_element(&token.delta_start)?;
            seq.serialize_element(&token.length)?;
            seq.serialize_element(&token.token_type)?;
            seq.serialize_element(&token.token_modifiers_bitset)?;
        }
        seq.end()
    }

    fn deserialize_tokens_opt<'de, D>(
        deserializer: D,
    ) -> Result<Option<Vec<SemanticToken>>, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        #[derive(Deserialize)]
        #[serde(transparent)]
        struct Wrapper {
            #[serde(deserialize_with = "SemanticToken::deserialize_tokens")]
            tokens: Vec<SemanticToken>,
        }

        Ok(Option::<Wrapper>::deserialize(deserializer)?.map(|wrapper| wrapper.tokens))
    }

    fn serialize_tokens_opt<S>(
        data: &Option<Vec<SemanticToken>>,
        serializer: S,
    ) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        #[derive(Serialize)]
        #[serde(transparent)]
        struct Wrapper {
            #[serde(serialize_with = "SemanticToken::serialize_tokens")]
            tokens: Vec<SemanticToken>,
        }

        let opt = data.as_ref().map(|t| Wrapper { tokens: t.to_vec() });

        opt.serialize(serializer)
    }
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokens {
    /// An optional result id. If provided and clients support delta updating
    /// the client will include the result id in the next semantic token request.
    /// A server can then instead of computing all semantic tokens again simply
    /// send a delta.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub result_id: Option<String>,

    /// The actual tokens. For a detailed description about how the data is
    /// structured please see
    /// <https://github.com/microsoft/vscode-extension-samples/blob/5ae1f7787122812dcc84e37427ca90af5ee09f14/semantic-tokens-sample/vscode.proposed.d.ts#L71>
    #[serde(
        deserialize_with = "SemanticToken::deserialize_tokens",
        serialize_with = "SemanticToken::serialize_tokens"
    )]
    pub data: Vec<SemanticToken>,
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensPartialResult {
    #[serde(
        deserialize_with = "SemanticToken::deserialize_tokens",
        serialize_with = "SemanticToken::serialize_tokens"
    )]
    pub data: Vec<SemanticToken>,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[serde(untagged)]
pub enum SemanticTokensResult {
    Tokens(SemanticTokens),
    Partial(SemanticTokensPartialResult),
}

impl From<SemanticTokens> for SemanticTokensResult {
    fn from(from: SemanticTokens) -> Self {
        SemanticTokensResult::Tokens(from)
    }
}

impl From<SemanticTokensPartialResult> for SemanticTokensResult {
    fn from(from: SemanticTokensPartialResult) -> Self {
        SemanticTokensResult::Partial(from)
    }
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensEdit {
    pub start: u32,
    pub delete_count: u32,

    #[serde(
        default,
        skip_serializing_if = "Option::is_none",
        deserialize_with = "SemanticToken::deserialize_tokens_opt",
        serialize_with = "SemanticToken::serialize_tokens_opt"
    )]
    pub data: Option<Vec<SemanticToken>>,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[serde(untagged)]
pub enum SemanticTokensFullDeltaResult {
    Tokens(SemanticTokens),
    TokensDelta(SemanticTokensDelta),
    PartialTokensDelta { edits: Vec<SemanticTokensEdit> },
}

impl From<SemanticTokens> for SemanticTokensFullDeltaResult {
    fn from(from: SemanticTokens) -> Self {
        SemanticTokensFullDeltaResult::Tokens(from)
    }
}

impl From<SemanticTokensDelta> for SemanticTokensFullDeltaResult {
    fn from(from: SemanticTokensDelta) -> Self {
        SemanticTokensFullDeltaResult::TokensDelta(from)
    }
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensDelta {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub result_id: Option<String>,
    /// For a detailed description how these edits are structured please see
    /// <https://github.com/microsoft/vscode-extension-samples/blob/5ae1f7787122812dcc84e37427ca90af5ee09f14/semantic-tokens-sample/vscode.proposed.d.ts#L131>
    pub edits: Vec<SemanticTokensEdit>,
}

/// Capabilities specific to the `textDocument/semanticTokens/*` requests.
///
/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensClientCapabilities {
    /// Whether implementation supports dynamic registration. If this is set to `true`
    /// the client supports the new `(TextDocumentRegistrationOptions & StaticRegistrationOptions)`
    /// return value for the corresponding server capability as well.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub dynamic_registration: Option<bool>,

    /// Which requests the client supports and might send to the server
    /// depending on the server's capability. Please note that clients might not
    /// show semantic tokens or degrade some of the user experience if a range
    /// or full request is advertised by the client but not provided by the
    /// server. If for example the client capability `requests.full` and
    /// `request.range` are both set to true but the server only provides a
    /// range provider the client might not render a minimap correctly or might
    /// even decide to not show any semantic tokens at all.
    pub requests: SemanticTokensClientCapabilitiesRequests,

    /// The token types that the client supports.
    pub token_types: Vec<SemanticTokenType>,

    /// The token modifiers that the client supports.
    pub token_modifiers: Vec<SemanticTokenModifier>,

    /// The token formats the clients supports.
    pub formats: Vec<TokenFormat>,

    /// Whether the client supports tokens that can overlap each other.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub overlapping_token_support: Option<bool>,

    /// Whether the client supports tokens that can span multiple lines.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub multiline_token_support: Option<bool>,

    /// Whether the client allows the server to actively cancel a
    /// semantic token request, e.g. supports returning
    /// ErrorCodes.ServerCancelled. If a server does the client
    /// needs to retrigger the request.
    ///
    /// @since 3.17.0
    #[serde(skip_serializing_if = "Option::is_none")]
    pub server_cancel_support: Option<bool>,

    /// Whether the client uses semantic tokens to augment existing
    /// syntax tokens. If set to `true` client side created syntax
    /// tokens and semantic tokens are both used for colorization. If
    /// set to `false` the client only uses the returned semantic tokens
    /// for colorization.
    ///
    /// If the value is `undefined` then the client behavior is not
    /// specified.
    ///
    /// @since 3.17.0
    #[serde(skip_serializing_if = "Option::is_none")]
    pub augments_syntax_tokens: Option<bool>,
}

#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensClientCapabilitiesRequests {
    /// The client will send the `textDocument/semanticTokens/range` request if the server provides a corresponding handler.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub range: Option<bool>,

    /// The client will send the `textDocument/semanticTokens/full` request if the server provides a corresponding handler.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub full: Option<SemanticTokensFullOptions>,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[serde(untagged)]
pub enum SemanticTokensFullOptions {
    Bool(bool),
    Delta {
        /// The client will send the `textDocument/semanticTokens/full/delta` request if the server provides a corresponding handler.
        /// The server supports deltas for full documents.
        #[serde(skip_serializing_if = "Option::is_none")]
        delta: Option<bool>,
    },
}

/// @since 3.16.0
#[derive(Debug, Eq, PartialEq, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensOptions {
    #[serde(flatten)]
    pub work_done_progress_options: WorkDoneProgressOptions,

    /// The legend used by the server
    pub legend: SemanticTokensLegend,

    /// Server supports providing semantic tokens for a specific range
    /// of a document.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub range: Option<bool>,

    /// Server supports providing semantic tokens for a full document.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub full: Option<SemanticTokensFullOptions>,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensRegistrationOptions {
    #[serde(flatten)]
    pub text_document_registration_options: TextDocumentRegistrationOptions,

    #[serde(flatten)]
    pub semantic_tokens_options: SemanticTokensOptions,

    #[serde(flatten)]
    pub static_registration_options: StaticRegistrationOptions,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[serde(untagged)]
pub enum SemanticTokensServerCapabilities {
    SemanticTokensOptions(SemanticTokensOptions),
    SemanticTokensRegistrationOptions(SemanticTokensRegistrationOptions),
}

impl From<SemanticTokensOptions> for SemanticTokensServerCapabilities {
    fn from(from: SemanticTokensOptions) -> Self {
        SemanticTokensServerCapabilities::SemanticTokensOptions(from)
    }
}

impl From<SemanticTokensRegistrationOptions> for SemanticTokensServerCapabilities {
    fn from(from: SemanticTokensRegistrationOptions) -> Self {
        SemanticTokensServerCapabilities::SemanticTokensRegistrationOptions(from)
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensWorkspaceClientCapabilities {
    /// Whether the client implementation supports a refresh request sent from
    /// the server to the client.
    ///
    /// Note that this event is global and will force the client to refresh all
    /// semantic tokens currently shown. It should be used with absolute care
    /// and is useful for situation where a server for example detect a project
    /// wide change that requires such a calculation.
    pub refresh_support: Option<bool>,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensParams {
    #[serde(flatten)]
    pub work_done_progress_params: WorkDoneProgressParams,

    #[serde(flatten)]
    pub partial_result_params: PartialResultParams,

    /// The text document.
    pub text_document: TextDocumentIdentifier,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensDeltaParams {
    #[serde(flatten)]
    pub work_done_progress_params: WorkDoneProgressParams,

    #[serde(flatten)]
    pub partial_result_params: PartialResultParams,

    /// The text document.
    pub text_document: TextDocumentIdentifier,

    /// The result id of a previous response. The result Id can either point to a full response
    /// or a delta response depending on what was received last.
    pub previous_result_id: String,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SemanticTokensRangeParams {
    #[serde(flatten)]
    pub work_done_progress_params: WorkDoneProgressParams,

    #[serde(flatten)]
    pub partial_result_params: PartialResultParams,

    /// The text document.
    pub text_document: TextDocumentIdentifier,

    /// The range the semantic tokens are requested for.
    pub range: Range,
}

#[derive(Debug, Eq, PartialEq, Clone, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[serde(untagged)]
pub enum SemanticTokensRangeResult {
    Tokens(SemanticTokens),
    Partial(SemanticTokensPartialResult),
}

impl From<SemanticTokens> for SemanticTokensRangeResult {
    fn from(tokens: SemanticTokens) -> Self {
        SemanticTokensRangeResult::Tokens(tokens)
    }
}

impl From<SemanticTokensPartialResult> for SemanticTokensRangeResult {
    fn from(partial: SemanticTokensPartialResult) -> Self {
        SemanticTokensRangeResult::Partial(partial)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::tests::{test_deserialization, test_serialization};

    #[test]
    fn test_semantic_tokens_support_serialization() {
        test_serialization(
            &SemanticTokens {
                result_id: None,
                data: vec![],
            },
            r#"{"data":[]}"#,
        );

        test_serialization(
            &SemanticTokens {
                result_id: None,
                data: vec![SemanticToken {
                    delta_line: 2,
                    delta_start: 5,
                    length: 3,
                    token_type: 0,
                    token_modifiers_bitset: 3,
                }],
            },
            r#"{"data":[2,5,3,0,3]}"#,
        );

        test_serialization(
            &SemanticTokens {
                result_id: None,
                data: vec![
                    SemanticToken {
                        delta_line: 2,
                        delta_start: 5,
                        length: 3,
                        token_type: 0,
                        token_modifiers_bitset: 3,
                    },
                    SemanticToken {
                        delta_line: 0,
                        delta_start: 5,
                        length: 4,
                        token_type: 1,
                        token_modifiers_bitset: 0,
                    },
                ],
            },
            r#"{"data":[2,5,3,0,3,0,5,4,1,0]}"#,
        );
    }

    #[test]
    fn test_semantic_tokens_support_deserialization() {
        test_deserialization(
            r#"{"data":[]}"#,
            &SemanticTokens {
                result_id: None,
                data: vec![],
            },
        );

        test_deserialization(
            r#"{"data":[2,5,3,0,3]}"#,
            &SemanticTokens {
                result_id: None,
                data: vec![SemanticToken {
                    delta_line: 2,
                    delta_start: 5,
                    length: 3,
                    token_type: 0,
                    token_modifiers_bitset: 3,
                }],
            },
        );

        test_deserialization(
            r#"{"data":[2,5,3,0,3,0,5,4,1,0]}"#,
            &SemanticTokens {
                result_id: None,
                data: vec![
                    SemanticToken {
                        delta_line: 2,
                        delta_start: 5,
                        length: 3,
                        token_type: 0,
                        token_modifiers_bitset: 3,
                    },
                    SemanticToken {
                        delta_line: 0,
                        delta_start: 5,
                        length: 4,
                        token_type: 1,
                        token_modifiers_bitset: 0,
                    },
                ],
            },
        );
    }

    #[test]
    #[should_panic]
    fn test_semantic_tokens_support_deserialization_err() {
        test_deserialization(
            r#"{"data":[1]}"#,
            &SemanticTokens {
                result_id: None,
                data: vec![],
            },
        );
    }

    #[test]
    fn test_semantic_tokens_edit_support_deserialization() {
        test_deserialization(
            r#"{"start":0,"deleteCount":1,"data":[2,5,3,0,3,0,5,4,1,0]}"#,
            &SemanticTokensEdit {
                start: 0,
                delete_count: 1,
                data: Some(vec![
                    SemanticToken {
                        delta_line: 2,
                        delta_start: 5,
                        length: 3,
                        token_type: 0,
                        token_modifiers_bitset: 3,
                    },
                    SemanticToken {
                        delta_line: 0,
                        delta_start: 5,
                        length: 4,
                        token_type: 1,
                        token_modifiers_bitset: 0,
                    },
                ]),
            },
        );

        test_deserialization(
            r#"{"start":0,"deleteCount":1}"#,
            &SemanticTokensEdit {
                start: 0,
                delete_count: 1,
                data: None,
            },
        );
    }

    #[test]
    fn test_semantic_tokens_edit_support_serialization() {
        test_serialization(
            &SemanticTokensEdit {
                start: 0,
                delete_count: 1,
                data: Some(vec![
                    SemanticToken {
                        delta_line: 2,
                        delta_start: 5,
                        length: 3,
                        token_type: 0,
                        token_modifiers_bitset: 3,
                    },
                    SemanticToken {
                        delta_line: 0,
                        delta_start: 5,
                        length: 4,
                        token_type: 1,
                        token_modifiers_bitset: 0,
                    },
                ]),
            },
            r#"{"start":0,"deleteCount":1,"data":[2,5,3,0,3,0,5,4,1,0]}"#,
        );

        test_serialization(
            &SemanticTokensEdit {
                start: 0,
                delete_count: 1,
                data: None,
            },
            r#"{"start":0,"deleteCount":1}"#,
        );
    }
}