Struct RegexAnalyzer 

pub struct RegexAnalyzer;

Analysis utilities for Perl regex patterns: capture extraction and hover text.

Implementations

impl RegexAnalyzer

pub fn extract_named_captures(pattern: &str) -> Vec<CaptureGroup>

Extract all named capture groups from a Perl regex pattern.

Scans the pattern for (?<name>...) groups and returns them in left-to-right order. Non-capturing groups ((?:...)), lookaheads, and lookbehinds do not increment the capture index. Escaped parentheses (\() are skipped.

Example

use perl_regex::RegexAnalyzer;
let caps = RegexAnalyzer::extract_named_captures("(?<year>\\d{4})-(?<month>\\d{2})");
assert_eq!(caps.len(), 2);
assert_eq!(caps[0].name, "year");
assert_eq!(caps[0].index, 1);

pub fn hover_text_for_regex(pattern: &str, modifiers: &str) -> String

Generate hover text for a Perl regex pattern and its modifiers.

Summarises the named capture groups and explains the meaning of each modifier flag (i, m, s, x, g, a, d, l, u, n, p, r, c, o, e). Repeated modifiers are deduplicated. Unknown modifier flags are collected and appended as Unknown modifiers: \…`` at the end of the hover text.

Example

use perl_regex::RegexAnalyzer;
let text = RegexAnalyzer::hover_text_for_regex("(?<id>\\d+)", "i");
assert!(text.contains("id"));
assert!(text.contains("case"));