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use crate::{matcher_needed::*, parselib::seek_end_of_options};
/// `PositionalMatcher` matches positional arguments — values not associated
/// with any named flag.
///
/// # Rules
///
/// * Before `--`: skips any argument that starts with the style's long or short
/// prefix (those belong to named matchers).
/// * After `--`: takes **everything** — the `--` marker signals that all
/// remaining values are positional, even if they look like flags.
/// * Runs at the lowest priority (see [`PickerArgAttr::Positional`](crate::PickerArgAttr::Positional)).
pub struct PositionalMatcher;
impl PositionalMatcher {
/// Check whether `raw` looks like a named flag (starts with a prefix).
#[inline(always)]
fn is_flag_like(raw: &str, style: &ParserStyle) -> bool {
raw.starts_with(style.long_prefix) || raw.starts_with(style.short_prefix)
}
}
impl Matcher for PositionalMatcher {
fn on_match_one(
args: &[MaskedArg],
style: &ParserStyle,
_arg_info: &PickerArgInfo,
) -> Option<usize> {
let end = seek_end_of_options(args, style);
for arg in args {
if end.is_some_and(|e| arg.raw_idx == e) {
// Hit `--`: everything from here on is positional,
// including the first arg after `--`.
continue;
}
if end.is_some_and(|e| arg.raw_idx > e) {
// After `--`: accept everything.
return Some(arg.raw_idx);
}
// Before `--`: skip flag-like args.
if !Self::is_flag_like(arg.raw, style) {
return Some(arg.raw_idx);
}
}
None
}
fn on_match_all(
args: &[MaskedArg],
style: &ParserStyle,
_arg_info: &PickerArgInfo,
) -> Vec<usize> {
let end = seek_end_of_options(args, style);
let mut after_end = false;
let mut result = Vec::new();
for arg in args {
if end.is_some_and(|e| arg.raw_idx == e) {
after_end = true;
continue;
}
if after_end || !Self::is_flag_like(arg.raw, style) {
result.push(arg.raw_idx);
}
}
result
}
}
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