some more regex tests

1 files changed, 17 insertions, 1 deletions

diff --git a/src/parse/regex/mod.rs b/src/parse/regex/mod.rs
index 98056cb..51527ae 100644
--- a/src/parse/regex/mod.rs
+++ b/src/parse/regex/mod.rs
@@ -107,7 +107,7 @@ fn parse_rep(s: &mut super::Cursor<'_>) -> Result<Pattern> {
     // TODO: non-greedy
 }
 
-const SYMBOLS: &[u8] = b"{}[]()*+-?|. ";
+const SYMBOLS: &[u8] = b"{}[]()*+-?|.\\ ";
 fn is_symbol(x: u8) -> bool {
     SYMBOLS.contains(&x)
 }
@@ -183,6 +183,22 @@ fn parse_atom(s: &mut super::Cursor<'_>) -> Result<Pattern> {
             s.highlight_from(begin, OtherHighlights::RegexSymbol);
             Ok(Pattern::Range(0, 127))
         }
+        b'\\' => {
+            s.adv();
+            if s.has() {
+                let escaped = s.adv();
+                s.highlight_from(begin, OtherHighlights::RegexSymbol);
+
+                if is_symbol(escaped) {
+                    Ok(Pattern::Byte(escaped))
+                } else {
+                    // TODO interpret \w and others
+                    Err(ParseError::Unknown(escaped))
+                }
+            } else {
+                Err(ParseError::Eof)
+            }
+        }
         x if is_symbol(x) => Ok(Pattern::Nothing),
         ch => {
             s.adv();