Fix some bugs (#17)

* add test

* fix: fix some bugs

Author: tanzaku

crates/lexer-generator/resources/scan.l

@@ -1137,9 +1137,9 @@ other			.
 							loop {
 								nchars -= 1;
 
-								if nchars > 1 &&
+								if !(nchars > 1 &&
 									(get_char_by_byte_pos(&yytext, nchars - 1) == '+' ||
-									get_char_by_byte_pos(&yytext, nchars - 1) == '-') {
+									get_char_by_byte_pos(&yytext, nchars - 1) == '-')) {
 									break;
 								}
 							}

crates/lexer-generator/src/lexer_generator.rs

@@ -129,7 +129,7 @@ fn construct_rule_defs(flex_file: &FlexFile) -> String {
                 // {original_pattern}
                 Rule {{
                     state: State::{s},
-                    pattern: Regex::new(r#"^({pattern})"#).unwrap(),
+                    pattern: Regex::new(r#"(?-u)^({pattern})"#).unwrap(),
                     kind: RuleKind::{rule_kind},
                 }}"###,
                 original_pattern = rule.pattern,