avatarr_parser/release_group/

mod.rs

// Ported from Sonarr v4.0.17.2952 (97e85a90):
//   src/NzbDrone.Core/Parser/Parser.cs — ParseReleaseGroup (lines 908-966)
//
// The release-group pipeline runs on the ORIGINAL un-preprocessed title
// (not the cascade-cleaned `simple_title`). It is called post-cascade by
// `parse_title` and returns the release group as an `Option<String>`.
//
// Pipeline order (Sonarr-faithful):
//   1. Trim + strip file extension
//   2. Apply Chinese-fansub PreSubstitutionRegex (first match wins)
//   3. Strip website prefix + torrent tracker suffix
//   4. Try anime [SubGroup] → return subgroup if matched
//   5. Apply clean-suffix strip (after anime check)
//   6. Try exception groups (25 context-bounded + 9 exact) → return if matched
//   7. Try trailing -GROUP extraction (hand-rolled) → return if matched
//   8. Return None

use once_cell::sync::Lazy;
use regex::Regex;

use crate::normalize;

// ---------------------------------------------------------------------------
// Constants: exception release groups (Sonarr Parser.cs line references)
// ---------------------------------------------------------------------------

/// Parser.cs:573 — 25 release groups that appear in parenthesised/bracketed
/// context (e.g. `(Silence)`, `[Joy]`). Requires a boundary char before and
/// a closing `]` or `)` after.
const EXCEPTION_GROUPS: &[&str] = &[
    "Silence",
    "afm72",
    "Panda",
    "Ghost",
    "MONOLITH",
    "Tigole",
    "Joy",
    "ImE",
    "UTR",
    "t3nzin",
    "Anime Time",
    "Project Angel",
    "Hakata Ramen",
    "HONE",
    "Vyndros",
    "SEV",
    "Garshasp",
    "Kappa",
    "Natty",
    "RCVR",
    "SAMPA",
    "YOGI",
    "r00t",
    "EDGE2020",
    "RZeroX",
];

/// Parser.cs:570 — 9 exact-match release groups that may appear anywhere
/// in the title (no context-boundary requirement beyond `\b`).
const EXCEPTION_EXACT_GROUPS: &[&str] = &[
    "D-Z0N3",
    "Fight-BB",
    "VARYG",
    "E.N.D",
    "KRaLiMaRKo",
    "BluDragon",
    "DarQ",
    "KCRT",
    "BEN THE MEN",
];

/// Regex for exact exception groups. `BEN THE MEN` uses flexible separators
/// (C#: `BEN[_. ]THE[_. ]MEN`); all others are literal.
static EXCEPTION_EXACT_REGEX: Lazy<Regex> = Lazy::new(|| {
    let alts: Vec<String> = EXCEPTION_EXACT_GROUPS
        .iter()
        .map(|&g| {
            if g == "BEN THE MEN" {
                r"BEN[_. ]THE[_. ]MEN".to_string()
            } else {
                regex::escape(g)
            }
        })
        .collect();
    let pattern = format!(r"(?i)(?P<releasegroup>{})\b", alts.join("|"));
    Regex::new(&pattern).expect("EXCEPTION_EXACT_REGEX")
});

/// Parser.cs:563 — invalid release groups (season/episode tag or 8-hex hash).
static INVALID_RELEASE_GROUP_REGEX: Lazy<Regex> =
    Lazy::new(|| Regex::new(r"(?i)^([se]\d+|[0-9a-f]{8})$").expect("INVALID_RELEASE_GROUP_REGEX"));

// ---------------------------------------------------------------------------
// Pre-processing regexes (release-group-specific)
// ---------------------------------------------------------------------------

/// Parser.cs:20-57 — Chinese fansub normalization regexes.
/// For release-group extraction, these normalise bracketed anime titles so the
/// `[SubGroup]` regex at step 4 can find the subgroup in the first bracket.
/// Order matters: first match wins (break after).
///
/// C# lookaheads (`(?=...)`) are dropped — Rust regex does not support
/// look-around. The remaining pattern constrains matches sufficiently for
/// release-group extraction (we only need the `[subgroup]` bracket).
static PRE_SUB_REGEXES: Lazy<Vec<(Regex, &'static str)>> = Lazy::new(|| {
    vec![
        // [0] Korean series without season number
        (
            Regex::new(r"\.E(\d{2,4})\.\d{6}\.(.*-NEXT)$").expect("PRE_SUB_0"),
            ".S01E$1.$2",
        ),
        // [1] Chinese anime with English + Chinese titles
        (
            Regex::new(
                r"(?i)^\[(?:(?P<subgroup>[^\]]+?)(?:[\x{4e00}-\x{9fcc}]+)?)\]\[(?P<title>[^\]]+?)(?:\s(?P<chinesetitle>[\x{4e00}-\x{9fcc}][^\]]*?))\]\[(?:(?:[\x{4e00}-\x{9fcc}]+?)?(?P<episode>\d{1,4})(?:[\x{4e00}-\x{9fcc}]+?)?)\]",
            )
            .expect("PRE_SUB_1"),
            "[${subgroup}] ${title} - ${episode} - ",
        ),
        // [2] LoliHouse/ZERO/Lilith-Raws/Skymoon-Raws/orion origin
        (
            Regex::new(
                r"(?i)^\[(?P<subgroup>[^\]]*?(?:LoliHouse|ZERO|Lilith-Raws|Skymoon-Raws|orion origin)[^\]]*?)\](?P<title>[^\[\]]+?)(?:\s-\s(?P<episode>[0-9-]+)\s*|\[\x{7b2c}?(?P<episode2>[0-9]+(?:-[0-9]+)?)\x{8bdd}?(?:END|\x{5b8c})?\])\[",
            )
            .expect("PRE_SUB_2"),
            "[${subgroup}][${title}][${episode}${episode2}][",
        ),
        // [3] Chinese with season number (lookahead dropped)
        (
            Regex::new(
                r"(?i)^\[(?P<subgroup>[^\]]+)\](?:\s?\x{2605}[^\[\s-]+\s?)?\[?(?:(?P<chinesetitle>[^\]]*?)(?:\]\[|\s*[_/\x{00b7}]\s*)){0,2}(?P<title>[^\[\]]+?)(?:\s(?:S?(?:(?:0)(?P<season>\d)|(?P<season2>[1-9]\d))))\]?(?:\[\d{4}\])?\[\x{7b2c}?(?P<episode>[0-9]+(?:-[0-9]+)?)\x{8bdd}?\x{96c6}?(?:\s?END|\x{5b8c}|\s?Fin)?\]",
            )
            .expect("PRE_SUB_3"),
            "[${subgroup}] ${title} S${season}${season2} - ${episode} ",
        ),
        // [4] GM-Team releases (lookahead dropped)
        (
            Regex::new(
                r"(?i)^\[(?P<subgroup>[^\]]+)\](?:(?P<chinesub>\[[^\]]*\])+)\[(?P<title>[^\]]+?)\](?P<junk>\[[^\]]+\])*\[(?P<episode>[0-9]+(?:-[0-9]+)?)(?:\sEND|\sFin)?\]",
            )
            .expect("PRE_SUB_4"),
            "[${subgroup}] ${title} - ${episode} ",
        ),
    ]
});

/// Parser.cs:565 — anime release group: leading `[SubGroup]`
static ANIME_RELEASE_GROUP_REGEX: Lazy<Regex> =
    Lazy::new(|| Regex::new(r"^\[(?P<subgroup>[^\]]+)\]").expect("ANIME_RELEASE_GROUP_REGEX"));

/// Parser.cs:549 — clean suffixes stripped before the trailing-group search.
/// These are indexer/scene tags appended after the real release group.
static CLEAN_RELEASE_GROUP_REGEX: Lazy<Regex> = Lazy::new(|| {
    Regex::new(
        r"(?i)(?:-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z0-9]*|WhiteRev|BUYMORE|AsRequested|AlternativeToRequested|GEROV|Z0iDS3N|Chamele0n|4P|4Planet|AlteZachen|RePACKPOST))+$",
    )
    .expect("CLEAN_RELEASE_GROUP_REGEX")
});

/// Resolution tokens. A candidate that IS one of these, or is followed by one
/// anywhere in the remaining title, gets rejected.
const RESOLUTION_TOKENS: &[&str] = &["480p", "576p", "720p", "1080p", "2160p"];

// ---------------------------------------------------------------------------
// Trailing -GROUP extraction (hand-rolled, step 7)
// ---------------------------------------------------------------------------
//
// Sonarr's ReleaseGroupRegex has two branches (ORed with `|`):
//
// Branch A: `-(?<releasegroup>[a-z0-9]+(?<part2>-[a-z0-9]+)?
//            (?!.+?(?:480p|576p|720p|1080p|2160p)))
//            (?<!(?:WEB-DL|Blu-Ray|480p|576p|720p|1080p|2160p|DTS-HD|
//            DTS-X|DTS-MA|DTS-ES|-ES|-EN|-CAT|[ ._]\d{4}-\d{2}|-\d{2})
//            (?:\k<part2>)?)
//            (?:\b|[-._ ]|$)`
//
// Branch B: `[-._ ]\[(?<releasegroup>[a-z0-9]+)\]$`
//
// Since Rust regex doesn't support lookaround or backreferences, we hand-roll
// the matching with explicit checks.

/// Patterns that, when they appear as the full `PREFIX-GROUP` or
/// `PREFIX-GROUP-PART2` match, indicate a codec/format — not a release group.
const BLACKLIST_FULL: &[&str] = &["WEB-DL", "Blu-Ray", "DTS-HD", "DTS-X", "DTS-MA", "DTS-ES"];

/// Suffixes that, when they are the entire candidate (single segment after a
/// dash), indicate a language/format tag — not a release group.
const BLACKLIST_SINGLE_SEGMENT: &[&str] = &["ES", "EN", "CAT"];

/// A trailing-group candidate found by the scanner.
struct TrailingCandidate {
    /// Position of the leading dash in the title.
    dash_pos: usize,
    /// End of the full candidate (after optional `-part2`).
    full_end: usize,
    /// The candidate text (everything after the leading dash).
    group: String,
}

/// Find all `-GROUP` or `-GROUP-PART2` candidates in the title.
fn find_trailing_group_candidates(title: &str) -> Vec<TrailingCandidate> {
    let mut candidates = Vec::new();
    let bytes = title.as_bytes();
    let len = bytes.len();
    let mut i = 0;

    while i < len {
        if bytes[i] == b'-' {
            let group_start = i + 1;
            if group_start >= len {
                break;
            }

            // Consume first segment: [a-zA-Z0-9]+
            let mut j = group_start;
            while j < len && bytes[j].is_ascii_alphanumeric() {
                j += 1;
            }
            if j == group_start {
                i += 1;
                continue;
            }

            let first_end = j;

            // Check for optional second segment: -[a-zA-Z0-9]+
            let mut full_end = first_end;
            if j < len && bytes[j] == b'-' {
                let seg2_start = j + 1;
                let mut k = seg2_start;
                while k < len && bytes[k].is_ascii_alphanumeric() {
                    k += 1;
                }
                if k > seg2_start {
                    full_end = k;
                }
            }

            let group_text = title[group_start..full_end].to_string();
            candidates.push(TrailingCandidate {
                dash_pos: i,
                full_end,
                group: group_text,
            });
            i = full_end;
        } else {
            i += 1;
        }
    }

    candidates
}

/// Check if the character(s) after the candidate constitute a valid boundary.
/// Sonarr requires `(?:\b|[-._ ]|$)` after the group.
///
/// The boundary definition mirrors .NET's `\b`: a transition between `\w`
/// (word char) and `\W` (non-word char). Since our candidate scanner only
/// captures ASCII alphanumeric groups, we need the next character to be
/// a non-word char. Unlike simple `!is_ascii_alphanumeric()`, we treat
/// Unicode alphabetic chars (`ë` = `ë`, etc.) as word chars — matching
/// .NET's `\w` class, which includes accented letters.
fn has_valid_boundary(title: &str, end: usize) -> bool {
    if end >= title.len() {
        return true; // end of string = `$`
    }
    // Get the character at `end`. If it's a word char (alphanumeric or
    // Unicode letter/digit), the boundary fails. Explicit separators
    // `[-._ ]` always count as boundaries.
    let remaining = &title[end..];
    if let Some(ch) = remaining.chars().next() {
        // Explicit separators always pass
        if matches!(ch, '-' | '.' | '_' | ' ') {
            return true;
        }
        // Unicode-aware word char check (mirrors .NET \w)
        // Rejects: accented letters (ë, é, etc.), CJK chars, any
        // Unicode alphabetic/numeric that isn't an ASCII separator.
        if ch.is_alphanumeric() {
            return false;
        }
        // Non-alphanumeric, non-separator: comma, bracket, etc.
        true
    } else {
        true // should not happen if end < len, but defensive
    }
}

/// Check if a resolution token appears anywhere after `pos` in the title.
fn resolution_after(title: &str, pos: usize) -> bool {
    if pos >= title.len() {
        return false;
    }
    let rest = &title[pos..];
    let rest_lower = rest.to_ascii_lowercase();
    RESOLUTION_TOKENS.iter().any(|&r| rest_lower.contains(r))
}

/// Check if the candidate itself IS a resolution token.
fn is_resolution(candidate: &str) -> bool {
    RESOLUTION_TOKENS
        .iter()
        .any(|&r| r.eq_ignore_ascii_case(candidate))
}

/// Check if the `PREFIX-CANDIDATE` context (looking backward from the dash)
/// matches a blacklisted full pattern like `WEB-DL`, `DTS-HD`, etc.
fn context_is_blacklisted(title: &str, candidate: &TrailingCandidate) -> bool {
    let dash_pos = candidate.dash_pos;

    // Scan backward from the dash to find the preceding alphanumeric token
    let mut prefix_start = dash_pos;
    while prefix_start > 0 && title.as_bytes()[prefix_start - 1].is_ascii_alphanumeric() {
        prefix_start -= 1;
    }

    if prefix_start < dash_pos {
        let full_token = &title[prefix_start..candidate.full_end];
        for &bl in BLACKLIST_FULL {
            if bl.eq_ignore_ascii_case(full_token) {
                return true;
            }
        }
    }

    // Single-segment candidates against the single-segment blacklist
    // Sonarr: `-ES`, `-EN`, `-CAT`
    if !candidate.group.contains('-') {
        for &bl in BLACKLIST_SINGLE_SEGMENT {
            if bl.eq_ignore_ascii_case(&candidate.group) {
                return true;
            }
        }
    }

    // Date pattern: `[ ._]\d{4}-\d{2}` — reject YYYY-MM at end.
    // Also catches YYYY-MM-DD when the candidate is MM-DD (2-segment).
    static DATE_PATTERN: Lazy<Regex> =
        Lazy::new(|| Regex::new(r"\d{4}-\d{2}$").expect("DATE_PATTERN"));
    if DATE_PATTERN.is_match(&title[..candidate.full_end]) {
        return true;
    }
    // Check if the full span ending at `full_end` is part of a YYYY-MM-DD
    // sequence where our candidate captured the MM-DD portion.
    static FULL_DATE_PATTERN: Lazy<Regex> =
        Lazy::new(|| Regex::new(r"\d{4}-\d{1,2}-\d{2}$").expect("FULL_DATE_PATTERN"));
    if FULL_DATE_PATTERN.is_match(&title[..candidate.full_end]) {
        return true;
    }

    // Reject bare 2-digit candidates (e.g. `-02` from a date)
    // Sonarr: `-\d{2}` in the lookbehind list
    static TWO_DIGIT: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\d{2}$").expect("TWO_DIGIT"));
    if TWO_DIGIT.is_match(&candidate.group) {
        return true;
    }

    false
}

/// Trailing `[group]` at end of title: `[-._ ]\[([A-Za-z0-9]+)\]$`
static TRAILING_BRACKET_GROUP_REGEX: Lazy<Regex> = Lazy::new(|| {
    Regex::new(r"[-._ ]\[(?P<releasegroup>[a-zA-Z0-9]+)\]$").expect("TRAILING_BRACKET_GROUP_REGEX")
});

// ---------------------------------------------------------------------------
// Exception context-bounded search (step 6)
// ---------------------------------------------------------------------------

/// Regex for the 25 exception groups. Sonarr requires:
///   - lookbehind `(?<=[._ \[])` — char before must be `.`, ` `, `_`, or `[`
///   - lookahead `(?=\]|\))` — char after must be `]` or `)`
///
/// We include the preceding char in the match and extract only the named group.
static EXCEPTION_RELEASE_GROUP_REGEX: Lazy<Regex> = Lazy::new(|| {
    let alts: Vec<String> = EXCEPTION_GROUPS.iter().map(|&g| regex::escape(g)).collect();
    let pattern = format!(r"(?i)[._ \[](?P<releasegroup>{})[)\]]", alts.join("|"));
    Regex::new(&pattern).expect("EXCEPTION_RELEASE_GROUP_REGEX")
});

// ---------------------------------------------------------------------------
// Public API
// ---------------------------------------------------------------------------

/// Extract the release group from a release title.
///
/// This is a standalone post-cascade function — it operates on the ORIGINAL
/// un-preprocessed title, not the `simple_title` from the regex cascade.
///
/// Returns `None` when no release group is found, the group is purely numeric,
/// or the group matches the invalid-group pattern (e.g. `S01`, hex hashes).
pub fn parse_release_group(title: &str) -> Option<String> {
    // Step 1: Trim + strip file extension
    let title = title.trim();
    if title.is_empty() {
        return None;
    }
    let mut title = normalize::remove_file_extension(title);

    // Step 2: Apply Chinese-fansub PreSubstitutionRegex (first match wins)
    for (re, replacement) in PRE_SUB_REGEXES.iter() {
        if re.is_match(&title) {
            title = re.replace(&title, *replacement).into_owned();
            break;
        }
    }

    // Step 3: Strip website prefix + torrent tracker suffix
    title = crate::episode::regexes::WEBSITE_PREFIX_REGEX
        .replace(&title, "")
        .into_owned();
    title = crate::episode::regexes::CLEAN_TORRENT_SUFFIX_REGEX
        .replace(&title, "")
        .into_owned();

    // Step 4: Try anime [SubGroup]
    if let Some(caps) = ANIME_RELEASE_GROUP_REGEX.captures(&title)
        && let Some(m) = caps.name("subgroup")
    {
        let subgroup = m.as_str().trim();
        if !subgroup.is_empty() {
            return Some(subgroup.to_string());
        }
    }

    // Step 5: Apply clean-suffix strip (AFTER anime check)
    title = CLEAN_RELEASE_GROUP_REGEX.replace(&title, "").into_owned();

    // Step 6a: Try exception groups (context-bounded, 25 entries)
    // Last match wins (Sonarr uses `.OfType<Match>().Last()`)
    let mut last_exception: Option<String> = None;
    for caps in EXCEPTION_RELEASE_GROUP_REGEX.captures_iter(&title) {
        if let Some(m) = caps.name("releasegroup") {
            last_exception = Some(m.as_str().to_string());
        }
    }
    if let Some(group) = last_exception {
        return Some(group);
    }

    // Step 6b: Try exact exception groups (9 entries, no context boundary)
    let mut last_exact: Option<String> = None;
    for caps in EXCEPTION_EXACT_REGEX.captures_iter(&title) {
        if let Some(m) = caps.name("releasegroup") {
            last_exact = Some(m.as_str().to_string());
        }
    }
    if let Some(group) = last_exact {
        return Some(group);
    }

    // Step 7: Try trailing -GROUP extraction (hand-rolled)
    //
    // Two sub-strategies (Sonarr ORs them in one regex):
    //   A) `-GROUP` or `-GROUP-PART2` with validation
    //   B) Trailing `[group]` at end of title

    // Strategy A: find all `-GROUP(-PART2)?` candidates
    let candidates = find_trailing_group_candidates(&title);

    // Iterate from last to first (last valid match wins in Sonarr)
    for candidate in candidates.iter().rev() {
        let group = &candidate.group;

        // Must be followed by a valid boundary
        if !has_valid_boundary(&title, candidate.full_end) {
            continue;
        }

        // Reject if resolution appears anywhere after the candidate
        if resolution_after(&title, candidate.full_end) {
            continue;
        }

        // Reject if the candidate itself is a resolution token
        if is_resolution(group) {
            continue;
        }

        // Reject if the prefix-candidate context matches a blacklisted pattern
        if context_is_blacklisted(&title, candidate) {
            continue;
        }

        // Reject pure numeric groups
        if group.parse::<i64>().is_ok() {
            continue;
        }

        // Reject invalid pattern (S01, E15, 8-char hex)
        if INVALID_RELEASE_GROUP_REGEX.is_match(group) {
            continue;
        }

        return Some(group.clone());
    }

    // Strategy B: trailing `[group]` at end of title
    if let Some(caps) = TRAILING_BRACKET_GROUP_REGEX.captures(&title)
        && let Some(m) = caps.name("releasegroup")
    {
        let group = m.as_str();
        if group.parse::<i64>().is_err() && !INVALID_RELEASE_GROUP_REGEX.is_match(group) {
            return Some(group.to_string());
        }
    }

    // Step 8: No group found
    None
}

// ---------------------------------------------------------------------------
// Unit tests
// ---------------------------------------------------------------------------

#[cfg(test)]
mod unit_tests {
    use super::*;

    #[test]
    fn trailing_group_candidate_search() {
        let cases = find_trailing_group_candidates("Series.S01E01.720p.HDTV.x264-LOL");
        assert!(
            cases.iter().any(|c| c.group == "LOL"),
            "should find LOL, got: {:?}",
            cases.iter().map(|c| &c.group).collect::<Vec<_>>()
        );

        let cases2 =
            find_trailing_group_candidates("SomeShow S01E168 1080p WEB-DL AAC 2.0 x264-Erai-raws");
        assert!(
            cases2.iter().any(|c| c.group == "Erai-raws"),
            "should find Erai-raws with hyphen, got: {:?}",
            cases2.iter().map(|c| &c.group).collect::<Vec<_>>()
        );
    }

    #[test]
    fn trailing_group_last_match_wins() {
        let candidates =
            find_trailing_group_candidates("Series-Title.S01E01.720p-FIRST.HDTV-SECOND");
        let last = candidates.last().map(|c| c.group.as_str());
        assert_eq!(last, Some("SECOND"), "last match should win");
    }

    #[test]
    fn invalid_release_group_rejection() {
        assert!(
            INVALID_RELEASE_GROUP_REGEX.is_match("S01"),
            "S01 should be invalid"
        );
        assert!(
            INVALID_RELEASE_GROUP_REGEX.is_match("s02"),
            "s02 should be invalid"
        );
        assert!(
            INVALID_RELEASE_GROUP_REGEX.is_match("E15"),
            "E15 should be invalid"
        );
        assert!(
            INVALID_RELEASE_GROUP_REGEX.is_match("6B7FD717"),
            "8-char hex should be invalid"
        );
        assert!(
            INVALID_RELEASE_GROUP_REGEX.is_match("6b7fd717"),
            "lowercase 8-char hex should be invalid"
        );
        assert!(
            !INVALID_RELEASE_GROUP_REGEX.is_match("LOL"),
            "LOL should be valid"
        );
    }

    #[test]
    fn blacklist_rejection() {
        let title = "Series.S01E01.720p.WEB-DL.x264";
        let candidates = find_trailing_group_candidates(title);
        let dl_candidate = candidates.iter().find(|c| c.group == "DL");
        assert!(dl_candidate.is_some(), "should find -DL candidate");
        assert!(
            context_is_blacklisted(title, dl_candidate.expect("dl candidate")),
            "WEB-DL should be context-blacklisted"
        );

        let title2 = "Series.S01E01.DTS-HD.MA.5.1.x264";
        let candidates2 = find_trailing_group_candidates(title2);
        let hd_candidate = candidates2.iter().find(|c| c.group == "HD");
        assert!(hd_candidate.is_some(), "should find -HD candidate");
        assert!(
            context_is_blacklisted(title2, hd_candidate.expect("hd candidate")),
            "DTS-HD should be context-blacklisted"
        );
    }

    #[test]
    fn resolution_suffix_rejection() {
        // "Series.720p.HDTV.x264-LOL.1080p" — position 25 is '.' after LOL
        // From 25 onward: ".1080p" contains "1080p"
        assert!(
            resolution_after("Series.720p.HDTV.x264-LOL.1080p", 25),
            "should detect 1080p after position 25"
        );
        // "Series.720p.HDTV.x264-LOL" — len=25, no content after
        assert!(
            !resolution_after("Series.720p.HDTV.x264-LOL", 25),
            "no resolution after group at end"
        );
        assert!(is_resolution("1080p"), "1080p should be a resolution");
        assert!(is_resolution("720p"), "720p should be a resolution");
        assert!(!is_resolution("LOL"), "LOL should not be a resolution");
    }
}