add regex literals

1 files changed, 3 insertions, 0 deletions

diff --git a/src/z/parser/lexer.zig b/src/z/parser/lexer.zig
index 66d4211..5beefde 100644
--- a/src/z/parser/lexer.zig
+++ b/src/z/parser/lexer.zig
@@ -43,6 +43,7 @@ pub fn Lexer(TokenKind: type) type {
         last_buffer: []const u8,
         tokens: []const Token(TokenKind) = &.{},
         context: TokenKind.Context = .{},
+        last_context: TokenKind.Context = .{},
 
         pub fn init(buffer: []const u8) Self {
             return .{
@@ -114,11 +115,13 @@ pub fn Lexer(TokenKind: type) type {
 
         pub fn revert(self: *Self) void {
             self.buffer = self.last_buffer;
+            self.context = self.last_context;
         }
 
         pub fn commit(self: *Self, tok: Token(TokenKind)) void {
             self.tokens = self.tokens ++ [_]Token(TokenKind){tok.stop(self)};
             self.last_buffer = self.buffer;
+            self.last_context = self.context;
         }
     };
 }