Struct SubjectParts 

pub struct SubjectParts {
    pub base_subject: String,
    pub part_index: Option<u32>,
    pub part_total: Option<u32>,
}

Fields extracted from a parsed Usenet/email subject line.

Returned by parse_subject. The base_subject field can be used as a stable grouping key across parts of the same series.

Field invariants

• base_subject is never empty when SubjectParts is returned (the only way to get an empty or no-marker subject back is if parse_subject returns Some with part_index = None).
• part_total is always Some when part_index is Some, because every supported marker format includes the total count.

Fields

base_subject: String

Subject line with the part-number marker removed and surrounding whitespace trimmed. Safe to use as a collection grouping key because all parts of the same series share the same base subject.

part_index: Option<u32>

1-based part number extracted from the marker. Some(0) indicates a TOC post (e.g. (00/17)). None when no recognised marker was found.

part_total: Option<u32>

Total number of parts as declared in the subject marker. Always Some when part_index is Some; None otherwise.

Trait Implementations

impl Debug for SubjectParts

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.