twilight_mention/parse/
impl.rs

1use crate::timestamp::{Timestamp, TimestampStyle};
2
3use super::{MentionIter, MentionType, ParseMentionError, ParseMentionErrorType};
4use crate::fmt::CommandMention;
5use std::{num::NonZeroU64, str::Chars};
6use twilight_model::id::marker::CommandMarker;
7use twilight_model::id::{
8    marker::{ChannelMarker, EmojiMarker, RoleMarker, UserMarker},
9    Id,
10};
11
12/// Parse mentions out of buffers.
13///
14/// While the syntax of mentions will be validated and the IDs within them
15/// parsed, they won't be validated as being proper snowflakes or as real IDs in
16/// use.
17///
18/// **Note** that this trait is sealed and is not meant to be manually
19/// implemented.
20pub trait ParseMention: private::Sealed {
21    /// Leading sigil(s) of the mention after the leading arrow (`<`).
22    ///
23    /// In a channel mention, the sigil is `#`. In the case of a user mention,
24    /// the sigil would be `@`.
25    const SIGILS: &'static [&'static str];
26
27    /// Parse a mention out of a buffer.
28    ///
29    /// This will not search the buffer for a mention and will instead treat the
30    /// entire buffer as a mention.
31    ///
32    /// # Examples
33    ///
34    /// ```
35    /// use twilight_mention::ParseMention;
36    /// use twilight_model::id::{
37    ///     marker::{ChannelMarker, UserMarker},
38    ///     Id,
39    /// };
40    ///
41    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
42    /// assert_eq!(Id::<ChannelMarker>::new(123), Id::parse("<#123>")?,);
43    /// assert_eq!(Id::<UserMarker>::new(456), Id::parse("<@456>")?,);
44    /// assert!(Id::<ChannelMarker>::parse("not a mention").is_err());
45    /// # Ok(()) }
46    /// ```
47    ///
48    /// # Errors
49    ///
50    /// Returns a [`ParseMentionErrorType::LeadingArrow`] error type if the
51    /// leading arrow is not present.
52    ///
53    /// Returns a [`ParseMentionErrorType::Sigil`] error type if the mention
54    /// type's sigil is not present after the leading arrow.
55    ///
56    /// Returns a [`ParseMentionErrorType::TrailingArrow`] error type if the
57    /// trailing arrow is not present after the ID.
58    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
59    where
60        Self: Sized;
61
62    /// Search a buffer for mentions and parse out any that are encountered.
63    ///
64    /// Unlike [`parse`], this will not error if anything that is indicative of
65    /// a mention is encountered but did not successfully parse, such as a `<`
66    /// but with no trailing mention sigil.
67    ///
68    /// [`parse`]: Self::parse
69    #[must_use = "you must use the iterator to lazily parse mentions"]
70    fn iter(buf: &str) -> MentionIter<'_, Self>
71    where
72        Self: Sized,
73    {
74        MentionIter::new(buf)
75    }
76}
77
78impl ParseMention for Id<ChannelMarker> {
79    const SIGILS: &'static [&'static str] = &["#"];
80
81    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
82    where
83        Self: Sized,
84    {
85        parse_mention(buf, Self::SIGILS).map(|(id, _, _)| Id::from(id))
86    }
87}
88
89impl ParseMention for CommandMention {
90    const SIGILS: &'static [&'static str] = &["/"];
91
92    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
93    where
94        Self: Sized,
95    {
96        // Can't use `parse_mention` due to significant pattern differences for command mentions.
97
98        let mut echars = buf.chars().enumerate();
99
100        let c = echars.next();
101        if c.map_or(true, |(_, c)| c != '<') {
102            return Err(ParseMentionError {
103                kind: ParseMentionErrorType::LeadingArrow {
104                    found: c.map(|(_, c)| c),
105                },
106                source: None,
107            });
108        }
109
110        let c = echars.next();
111        if c.map_or(true, |(_, c)| c != '/') {
112            return Err(ParseMentionError {
113                kind: ParseMentionErrorType::Sigil {
114                    expected: Self::SIGILS,
115                    found: c.map(|(_, c)| c),
116                },
117                source: None,
118            });
119        }
120
121        let mut segments: Vec<&str> = Vec::new();
122        let mut current_segment: usize = 2;
123        let id_sep = loop {
124            match echars.next() {
125                None => {
126                    if !&buf[current_segment..].trim().is_empty() {
127                        segments.push(&buf[current_segment..]);
128                    }
129
130                    let (expected, found) = match segments.len() {
131                        // no segment found, require name and id
132                        0 => (2, 0),
133                        // only found name, needs id
134                        1 => (2, 1),
135                        // only found name and subcommand, needs id
136                        2 => (3, 2),
137                        // only found name, subcommand and subcommand group, needs id
138                        3 => (4, 3),
139                        // too many segments
140                        _ => {
141                            return Err(ParseMentionError {
142                                kind: ParseMentionErrorType::ExtraneousPart {
143                                    found: &buf[current_segment..],
144                                },
145                                source: None,
146                            })
147                        }
148                    };
149
150                    return Err(ParseMentionError {
151                        kind: ParseMentionErrorType::PartMissing { expected, found },
152                        source: None,
153                    });
154                }
155
156                Some((i, ':')) => {
157                    if !&buf[current_segment..i].trim().is_empty() {
158                        segments.push(&buf[current_segment..i]);
159                    }
160                    break i;
161                }
162
163                Some((i, ' ')) => {
164                    if !buf[current_segment..i].trim().is_empty() {
165                        segments.push(&buf[current_segment..i]);
166                    }
167
168                    current_segment = i + 1;
169                }
170
171                Some(_) => (),
172            }
173        };
174
175        let id = loop {
176            match echars.next() {
177                None => {
178                    return Err(ParseMentionError {
179                        kind: ParseMentionErrorType::TrailingArrow { found: None },
180                        source: None,
181                    })
182                }
183                Some((i, '>')) => break &buf[(id_sep + 1)..i],
184                Some((_, c)) if !c.is_numeric() => {
185                    return Err(ParseMentionError {
186                        kind: ParseMentionErrorType::TrailingArrow { found: Some(c) },
187                        source: None,
188                    })
189                }
190                _ => (),
191            }
192        };
193
194        let id: Id<CommandMarker> = match id.parse() {
195            Ok(id) => id,
196            Err(e) => {
197                return Err(ParseMentionError {
198                    kind: ParseMentionErrorType::IdNotU64 { found: id },
199                    source: Some(Box::new(e)),
200                })
201            }
202        };
203
204        let mut segments = segments.into_iter();
205        match_command_mention_from_segments(
206            id,
207            segments.next(),
208            segments.next(),
209            segments.next(),
210            segments.next(),
211        )
212    }
213}
214
215impl ParseMention for Id<EmojiMarker> {
216    const SIGILS: &'static [&'static str] = &[":"];
217
218    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
219    where
220        Self: Sized,
221    {
222        parse_mention(buf, Self::SIGILS).map(|(id, _, _)| Id::from(id))
223    }
224}
225
226impl ParseMention for MentionType {
227    /// Sigils for any type of mention.
228    ///
229    /// Contains all of the sigils of every other type of mention.
230    const SIGILS: &'static [&'static str] = &["#", ":", "@&", "@", "t:"];
231
232    /// Parse a mention from a string slice.
233    ///
234    /// # Examples
235    ///
236    /// Returns [`ParseMentionErrorType::TimestampStyleInvalid`] if a timestamp
237    /// style value is invalid.
238    ///
239    /// [`ParseMentionError::TimestampStyleInvalid`]: super::error::ParseMentionErrorType::TimestampStyleInvalid
240    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
241    where
242        Self: Sized,
243    {
244        let (id, maybe_modifier, found) = parse_mention(buf, Self::SIGILS)?;
245
246        for sigil in Id::<ChannelMarker>::SIGILS {
247            if *sigil == found {
248                return Ok(MentionType::Channel(Id::from(id)));
249            }
250        }
251
252        for sigil in Id::<EmojiMarker>::SIGILS {
253            if *sigil == found {
254                return Ok(MentionType::Emoji(Id::from(id)));
255            }
256        }
257
258        for sigil in Id::<RoleMarker>::SIGILS {
259            if *sigil == found {
260                return Ok(MentionType::Role(Id::from(id)));
261            }
262        }
263
264        for sigil in Timestamp::SIGILS {
265            if *sigil == found {
266                let maybe_style = parse_maybe_style(maybe_modifier)?;
267
268                return Ok(MentionType::Timestamp(Timestamp::new(
269                    id.get(),
270                    maybe_style,
271                )));
272            }
273        }
274
275        for sigil in Id::<UserMarker>::SIGILS {
276            if *sigil == found {
277                return Ok(MentionType::User(Id::from(id)));
278            }
279        }
280
281        unreachable!("mention type must have been found");
282    }
283}
284
285impl ParseMention for Id<RoleMarker> {
286    const SIGILS: &'static [&'static str] = &["@&"];
287
288    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
289    where
290        Self: Sized,
291    {
292        parse_mention(buf, Self::SIGILS).map(|(id, _, _)| Id::from(id))
293    }
294}
295
296impl ParseMention for Timestamp {
297    const SIGILS: &'static [&'static str] = &["t:"];
298
299    /// Parse a timestamp from a string slice.
300    ///
301    /// # Examples
302    ///
303    /// Returns [`ParseMentionErrorType::TimestampStyleInvalid`] if the
304    /// timestamp style value is invalid.
305    ///
306    /// [`ParseMentionError::TimestampStyleInvalid`]: super::error::ParseMentionErrorType::TimestampStyleInvalid
307    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
308    where
309        Self: Sized,
310    {
311        let (unix, maybe_modifier, _) = parse_mention(buf, Self::SIGILS)?;
312
313        Ok(Timestamp::new(
314            unix.get(),
315            parse_maybe_style(maybe_modifier)?,
316        ))
317    }
318}
319
320impl ParseMention for Id<UserMarker> {
321    /// Sigil for User ID mentions.
322    const SIGILS: &'static [&'static str] = &["@"];
323
324    fn parse(buf: &str) -> Result<Self, ParseMentionError<'_>>
325    where
326        Self: Sized,
327    {
328        parse_mention(buf, Self::SIGILS).map(|(id, _, _)| Id::from(id))
329    }
330}
331
332/// Matches the four segments of [`CommandMention::parse`] into the final `Result` for it.
333#[inline]
334fn match_command_mention_from_segments<'s>(
335    id: Id<CommandMarker>,
336    first: Option<&'s str>,
337    second: Option<&'s str>,
338    third: Option<&'s str>,
339    fourth: Option<&'s str>,
340) -> Result<CommandMention, ParseMentionError<'s>> {
341    match (first, second, third, fourth) {
342        (_, _, _, Some(extra)) => Err(ParseMentionError {
343            kind: ParseMentionErrorType::ExtraneousPart { found: extra },
344            source: None,
345        }),
346        (None, _, _, _) => {
347            Err(ParseMentionError {
348                kind: ParseMentionErrorType::PartMissing {
349                    // at least two for command
350                    expected: 2,
351                    // we found the id until now
352                    found: 1,
353                },
354                source: None,
355            })
356        }
357        (Some(name), None, None, None) => Ok(CommandMention::Command {
358            name: name.to_owned(),
359            id,
360        }),
361        (Some(name), Some(sub_command), None, None) => Ok(CommandMention::SubCommand {
362            name: name.to_owned(),
363            sub_command: sub_command.to_owned(),
364            id,
365        }),
366        (Some(name), Some(sub_command_group), Some(sub_command), None) => {
367            Ok(CommandMention::SubCommandGroup {
368                name: name.to_owned(),
369                sub_command: sub_command.to_owned(),
370                sub_command_group: sub_command_group.to_owned(),
371                id,
372            })
373        }
374        _ => unreachable!(),
375    }
376}
377
378/// Parse a possible style value string slice into a [`TimestampStyle`].
379///
380/// # Errors
381///
382/// Returns [`ParseMentionErrorType::TimestampStyleInvalid`] if the timestamp
383/// style value is invalid.
384fn parse_maybe_style(value: Option<&str>) -> Result<Option<TimestampStyle>, ParseMentionError<'_>> {
385    Ok(if let Some(modifier) = value {
386        Some(
387            TimestampStyle::try_from(modifier).map_err(|source| ParseMentionError {
388                kind: ParseMentionErrorType::TimestampStyleInvalid { found: modifier },
389                source: Some(Box::new(source)),
390            })?,
391        )
392    } else {
393        None
394    })
395}
396
397/// # Errors
398///
399/// Returns [`ParseMentionErrorType::LeadingArrow`] if the leading arrow is not
400/// present.
401///
402/// Returns [`ParseMentionErrorType::Sigil`] if the mention type's sigil is not
403/// present after the leading arrow.
404///
405/// Returns [`ParseMentionErrorType::TrailingArrow`] if the trailing arrow is
406/// not present after the ID.
407fn parse_mention<'a>(
408    buf: &'a str,
409    sigils: &'a [&'a str],
410) -> Result<(NonZeroU64, Option<&'a str>, &'a str), ParseMentionError<'a>> {
411    let mut chars = buf.chars();
412
413    let c = chars.next();
414
415    if c != Some('<') {
416        return Err(ParseMentionError {
417            kind: ParseMentionErrorType::LeadingArrow { found: c },
418            source: None,
419        });
420    }
421
422    let maybe_sigil = sigils.iter().find(|sigil| {
423        if chars.as_str().starts_with(*sigil) {
424            for _ in 0..sigil.chars().count() {
425                chars.next();
426            }
427
428            return true;
429        }
430
431        false
432    });
433
434    let sigil = if let Some(sigil) = maybe_sigil {
435        *sigil
436    } else {
437        return Err(ParseMentionError {
438            kind: ParseMentionErrorType::Sigil {
439                expected: sigils,
440                found: chars.next(),
441            },
442            source: None,
443        });
444    };
445
446    if sigil == ":" && !separator_sigil_present(&mut chars) {
447        return Err(ParseMentionError {
448            kind: ParseMentionErrorType::PartMissing {
449                found: 1,
450                expected: 2,
451            },
452            source: None,
453        });
454    }
455
456    let end_position = chars
457        .as_str()
458        .find('>')
459        .ok_or_else(|| ParseMentionError::trailing_arrow(None))?;
460    let maybe_split_position = chars.as_str().find(':');
461
462    let end_of_id_position = maybe_split_position.unwrap_or(end_position);
463
464    let remaining = chars
465        .as_str()
466        .get(..end_of_id_position)
467        .ok_or_else(|| ParseMentionError::trailing_arrow(None))?;
468
469    let num = remaining.parse().map_err(|source| ParseMentionError {
470        kind: ParseMentionErrorType::IdNotU64 { found: remaining },
471        source: Some(Box::new(source)),
472    })?;
473
474    // If additional information - like a timestamp style - is present then we
475    // can just get a subslice of the string via the split and ending positions.
476    let style = maybe_split_position.and_then(|split_position| {
477        chars.next();
478
479        // We need to remove 1 so we don't catch the `>` in it.
480        let style_end_position = end_position - 1;
481
482        chars.as_str().get(split_position..style_end_position)
483    });
484
485    Ok((num, style, sigil))
486}
487
488// Don't use `Iterator::skip_while` so we can mutate `chars` in-place;
489// `skip_while` is consuming.
490fn separator_sigil_present(chars: &mut Chars<'_>) -> bool {
491    for c in chars {
492        if c == ':' {
493            return true;
494        }
495    }
496
497    false
498}
499
500/// Rust doesn't allow leaking private implementations, but if we make the trait
501/// public in a private scope then it gets by the restriction and doesn't allow
502/// Sealed to be named.
503///
504/// Yes, this is the correct way of sealing a trait:
505///
506/// <https://rust-lang.github.io/api-guidelines/future-proofing.html>
507mod private {
508    use super::super::MentionType;
509    use crate::fmt::CommandMention;
510    use crate::timestamp::Timestamp;
511    use twilight_model::id::{
512        marker::{ChannelMarker, EmojiMarker, RoleMarker, UserMarker},
513        Id,
514    };
515
516    pub trait Sealed {}
517
518    impl Sealed for Id<ChannelMarker> {}
519    impl Sealed for CommandMention {}
520    impl Sealed for Id<EmojiMarker> {}
521    impl Sealed for MentionType {}
522    impl Sealed for Id<RoleMarker> {}
523    impl Sealed for Timestamp {}
524    impl Sealed for Id<UserMarker> {}
525}
526
527#[cfg(test)]
528mod tests {
529    use super::{
530        super::{MentionType, ParseMentionErrorType},
531        private::Sealed,
532        ParseMention,
533    };
534    use crate::fmt::CommandMention;
535    use crate::{
536        parse::ParseMentionError,
537        timestamp::{Timestamp, TimestampStyle},
538    };
539    use static_assertions::assert_impl_all;
540    use twilight_model::id::{
541        marker::{ChannelMarker, EmojiMarker, RoleMarker, UserMarker},
542        Id,
543    };
544
545    assert_impl_all!(Id<ChannelMarker>: ParseMention, Sealed);
546    assert_impl_all!(CommandMention: ParseMention, Sealed);
547    assert_impl_all!(Id<EmojiMarker>: ParseMention, Sealed);
548    assert_impl_all!(MentionType: ParseMention, Sealed);
549    assert_impl_all!(Id<RoleMarker>: ParseMention, Sealed);
550    assert_impl_all!(Id<UserMarker>: ParseMention, Sealed);
551
552    #[test]
553    fn sigils() {
554        assert_eq!(&["#"], Id::<ChannelMarker>::SIGILS);
555        assert_eq!(&["/"], CommandMention::SIGILS);
556        assert_eq!(&[":"], Id::<EmojiMarker>::SIGILS);
557        assert_eq!(&["#", ":", "@&", "@", "t:"], MentionType::SIGILS);
558        assert_eq!(&["@&"], Id::<RoleMarker>::SIGILS);
559        assert_eq!(&["@"], Id::<UserMarker>::SIGILS);
560    }
561
562    #[test]
563    fn parse_channel_id() {
564        assert_eq!(Id::<ChannelMarker>::new(123), Id::parse("<#123>").unwrap());
565        assert_eq!(
566            &ParseMentionErrorType::Sigil {
567                expected: &["#"],
568                found: Some('@'),
569            },
570            Id::<ChannelMarker>::parse("<@123>").unwrap_err().kind(),
571        );
572    }
573
574    #[test]
575    fn parse_command_mention() {
576        assert_eq!(
577            &ParseMentionErrorType::PartMissing {
578                expected: 2,
579                found: 1,
580            },
581            CommandMention::parse("</ :123>").unwrap_err().kind()
582        );
583
584        assert_eq!(
585            CommandMention::Command {
586                name: "command".to_owned(),
587                id: Id::new(123)
588            },
589            CommandMention::parse("</command:123>").unwrap()
590        );
591
592        assert_eq!(
593            CommandMention::SubCommand {
594                name: "command".to_owned(),
595                sub_command: "subcommand".to_owned(),
596                id: Id::new(123)
597            },
598            CommandMention::parse("</command subcommand:123>").unwrap()
599        );
600
601        // this is more relaxed than the discord client
602        assert_eq!(
603            CommandMention::SubCommand {
604                name: "command".to_owned(),
605                sub_command: "subcommand".to_owned(),
606                id: Id::new(123)
607            },
608            CommandMention::parse("</command  subcommand:123>").unwrap()
609        );
610
611        assert_eq!(
612            CommandMention::SubCommandGroup {
613                name: "command".to_owned(),
614                sub_command: "subcommand".to_owned(),
615                sub_command_group: "subcommand_group".to_owned(),
616                id: Id::new(123)
617            },
618            CommandMention::parse("</command subcommand_group subcommand:123>").unwrap()
619        );
620
621        assert_eq!(
622            &ParseMentionErrorType::ExtraneousPart { found: "d" },
623            CommandMention::parse("</a b c d:123>").unwrap_err().kind()
624        );
625
626        assert_eq!(
627            &ParseMentionErrorType::IdNotU64 { found: "0" },
628            CommandMention::parse("</a:0>").unwrap_err().kind()
629        );
630
631        assert_eq!(
632            &ParseMentionErrorType::TrailingArrow { found: Some('b') },
633            CommandMention::parse("</a:b>").unwrap_err().kind()
634        );
635
636        assert_eq!(
637            &ParseMentionErrorType::TrailingArrow { found: None },
638            CommandMention::parse("</a:123").unwrap_err().kind()
639        );
640
641        for (input, expected, found) in [
642            ("</", 2, 0),
643            ("</a", 2, 1),
644            ("</a b", 3, 2),
645            ("</a b c", 4, 3),
646        ] {
647            assert_eq!(
648                &ParseMentionErrorType::PartMissing { expected, found },
649                CommandMention::parse(input).unwrap_err().kind()
650            );
651        }
652
653        assert_eq!(
654            &ParseMentionErrorType::ExtraneousPart { found: "d" },
655            CommandMention::parse("</a b c d").unwrap_err().kind()
656        );
657    }
658
659    #[test]
660    fn parse_emoji_id() {
661        assert_eq!(
662            Id::<EmojiMarker>::new(123),
663            Id::parse("<:name:123>").unwrap()
664        );
665        assert_eq!(
666            &ParseMentionErrorType::Sigil {
667                expected: &[":"],
668                found: Some('@'),
669            },
670            Id::<EmojiMarker>::parse("<@123>").unwrap_err().kind(),
671        );
672    }
673
674    #[test]
675    fn parse_mention_type() {
676        assert_eq!(
677            MentionType::Channel(Id::new(123)),
678            MentionType::parse("<#123>").unwrap()
679        );
680        assert_eq!(
681            MentionType::Emoji(Id::new(123)),
682            MentionType::parse("<:name:123>").unwrap()
683        );
684        assert_eq!(
685            MentionType::Role(Id::new(123)),
686            MentionType::parse("<@&123>").unwrap()
687        );
688        assert_eq!(
689            MentionType::User(Id::new(123)),
690            MentionType::parse("<@123>").unwrap()
691        );
692        assert_eq!(
693            &ParseMentionErrorType::Sigil {
694                expected: &["#", ":", "@&", "@", "t:"],
695                found: Some(';'),
696            },
697            MentionType::parse("<;123>").unwrap_err().kind(),
698        );
699    }
700
701    #[test]
702    fn parse_role_id() {
703        assert_eq!(Id::<RoleMarker>::new(123), Id::parse("<@&123>").unwrap());
704        assert_eq!(
705            &ParseMentionErrorType::Sigil {
706                expected: &["@&"],
707                found: Some('@'),
708            },
709            Id::<RoleMarker>::parse("<@123>").unwrap_err().kind(),
710        );
711    }
712
713    #[test]
714    fn parse_timestamp() -> Result<(), ParseMentionError<'static>> {
715        assert_eq!(Timestamp::new(123, None), Timestamp::parse("<t:123>")?);
716        assert_eq!(
717            Timestamp::new(123, Some(TimestampStyle::RelativeTime)),
718            Timestamp::parse("<t:123:R>")?
719        );
720        assert_eq!(
721            &ParseMentionErrorType::TimestampStyleInvalid { found: "?" },
722            Timestamp::parse("<t:123:?>").unwrap_err().kind(),
723        );
724
725        Ok(())
726    }
727
728    #[test]
729    fn parse_user_id() {
730        assert_eq!(Id::<UserMarker>::new(123), Id::parse("<@123>").unwrap());
731        assert_eq!(
732            &ParseMentionErrorType::IdNotU64 { found: "&123" },
733            Id::<UserMarker>::parse("<@&123>").unwrap_err().kind(),
734        );
735    }
736
737    #[test]
738    fn parse_id_wrong_sigil() {
739        assert_eq!(
740            &ParseMentionErrorType::Sigil {
741                expected: &["@"],
742                found: Some('#'),
743            },
744            super::parse_mention("<#123>", &["@"]).unwrap_err().kind(),
745        );
746        assert_eq!(
747            &ParseMentionErrorType::Sigil {
748                expected: &["#"],
749                found: None,
750            },
751            super::parse_mention("<", &["#"]).unwrap_err().kind(),
752        );
753        assert_eq!(
754            &ParseMentionErrorType::Sigil {
755                expected: &["#"],
756                found: None,
757            },
758            super::parse_mention("<", &["#"]).unwrap_err().kind(),
759        );
760    }
761}
twilight_mention/parse/impl.rs

twilight_mention/parse/
impl.rs
