Function parse

std/re/src/main/parser.rs:7–21

Parse a pattern into a Program or fail with a positioned error. */

(pattern: &str)

/* Parse a pattern into a Program or fail with a positioned error. */
pub fn parse(pattern: &str) -> Result<Program, ParseError> {
    let chars: Vec<char> = pattern.chars().collect();
    let mut p = Parser {
        p: &chars,
        pos: 0,
        group_count: 0,
        names: Vec::new(),
        flags: Flags::default(),
    };
    let root = p.alternation()?;
    if p.pos != p.p.len() {
        return Err(p.err("unbalanced parenthesis"));
    }
    Ok(Program { root, group_count: p.group_count, names: p.names, flags: p.flags })
}

struct Parser<'a> {
    p: &'a [char],