update regex util

src/regex_util.rs

@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 
-use regex::Regex;
+use regex::{Captures, Regex};
 
 pub trait RegexFullMatch {
     /// Eq of C fullMatch
@@ -10,18 +10,16 @@ pub trait RegexFullMatch {
 pub trait RegexConsume {
     /// Eq of C Consume
     fn consume_start<'a>(&self, s: &'a str) -> Option<Cow<'a, str>> {
-        self.consume_start_capturing(s, &mut [])
+        self.consume_start_capturing(s).map(| res| res.0)
     }
 
-    fn consume_start_capturing<'a, 'b>(&self, s: &'a str, groups: &mut [&'b str]) -> Option<Cow<'a, str>>
-        where 'a: 'b;
+    fn consume_start_capturing<'a>(&self, s: &'a str) -> Option<(Cow<'a, str>, Captures<'a>)>;
     
     fn find_and_consume<'a>(&self, s: &'a str) -> Option<Cow<'a, str>> {
-        self.find_and_consume_capturing(s, &mut [])
+        self.find_and_consume_capturing(s).map(| res| res.0)
     }
     
-    fn find_and_consume_capturing<'a, 'b>(&self, s: &'a str, groups: &mut [&'b str]) -> Option<Cow<'a, str>>
-        where 'a: 'b;
+    fn find_and_consume_capturing<'a>(&self, s: &'a str) -> Option<(Cow<'a, str>, Captures<'a>)>;
 }
 
 trait RegexMatchStart {
@@ -50,42 +48,24 @@ impl RegexMatchStart for Regex {
 }
 
 impl RegexConsume for Regex {
-    fn consume_start_capturing<'a, 'b>(&self, s: &'a str, groups: &mut [&'b str]) -> Option<Cow<'a, str>>
-        where 'a: 'b {
-        _consume(self, s, groups, true)
+    fn consume_start_capturing<'a>(&self, s: &'a str) -> Option<(Cow<'a, str>, Captures<'a>)> {
+        _consume(self, s, true)
     }
 
-    fn find_and_consume_capturing<'a, 'b>(&self, s: &'a str, groups: &mut [&'b str]) -> Option<Cow<'a, str>>
-        where 'a: 'b {
-        _consume(self, s, groups, false)
+    fn find_and_consume_capturing<'a>(&self, s: &'a str) -> Option<(Cow<'a, str>, Captures<'a>)> {
+        _consume(self, s, false)
     }
 }
 
-fn _consume<'a, 'b>(
+fn _consume<'a>(
     r: &Regex, input: &'a str, 
-    groups: &mut [&'b str], anchor_at_start: bool
-) -> Option<Cow<'a, str>>
-    where 'a: 'b {
+    anchor_at_start: bool
+) -> Option<(Cow<'a, str>, Captures<'a>)> {
     let captures = r.captures(input)?;
     let full_capture = captures.get(0)?;
     if anchor_at_start && full_capture.start() != 0 {
         return None
     }
-    // Check if expected groups count is leq
-    // captures.len includes full group (0), so take captures.len() - 1
-    if groups.len() > captures.len() - 1 {
-        return None;
-    }
 
-    // If less matches than expected - fail.
-    for i in 1..=groups.len() {
-        // Groups are counted from 1 rather than 0.
-        if let Some(capture) = captures.get(i) {
-            groups[i-1] = capture.as_str();
-        } else {
-            // should never happen
-            return None
-        }
-    }
-    Some(Cow::Borrowed(&input[full_capture.end()..]))
+    Some((Cow::Borrowed(&input[full_capture.end()..]), captures))
 }