refactor: inline exp source list

scie-grammar/src/rule/begin_end_rule.rs

-use crate::rule::reg_exp_source::{RegExpSource, RegExpSourceList};
+use crate::rule::{RegExpSource, RegExpSourceList};
 use crate::rule::{Rule, AbstractRule};
 use crate::inter::ILocation;
 use crate::rule::rule_factory::ICompilePatternsResult;

scie-grammar/src/rule/begin_while_rule.rs

 use crate::rule::{AbstractRule, Rule};
-use crate::rule::reg_exp_source::{RegExpSource, RegExpSourceList};
+use crate::rule::{RegExpSource, RegExpSourceList};
 use crate::rule::rule_factory::ICompilePatternsResult;
 use crate::inter::ILocation;
 

scie-grammar/src/rule/match_rule.rs

 use crate::rule::{AbstractRule, Rule};
 use crate::inter::ILocation;
-use crate::rule::reg_exp_source::RegExpSource;
+use crate::rule::RegExpSource;
 
 #[derive(Clone, Debug, Serialize)]
 pub struct MatchRule {

scie-grammar/src/rule/mod.rs

 pub mod rule_factory;
 pub mod rule_convert;
-pub mod reg_exp_source;
 
 pub mod abstract_rule;
 pub mod begin_end_rule;
@@ -19,7 +18,6 @@ pub use self::match_rule::MatchRule;
 pub use self::capture_rule::CaptureRule;
 
 use crate::inter::{ILocation, IRawGrammar, IRawRepository};
-use reg_exp_source::{RegExpSource, RegExpSourceList};
 use crate::rule::rule_factory::ICompilePatternsResult;
 use core::fmt;
 use serde::{Serialize, Serializer};
@@ -82,3 +80,21 @@ pub trait IGrammarRegistry {
 }
 
 pub trait IRuleFactoryHelper: IGrammarRegistry + IRuleRegistry {}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct RegExpSourceList {}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct RegExpSource {
+    pub source: String,
+    pub rule_id: i32,
+}
+
+impl RegExpSource {
+    pub fn new(reg_exp_source: String, rule_id: i32) -> RegExpSource {
+        RegExpSource {
+            source: reg_exp_source,
+            rule_id,
+        }
+    }
+}

scie-grammar/src/rule/reg_exp_source.rs

-#[derive(Clone, Debug, Serialize)]
-pub struct RegExpSourceList {}
-
-#[derive(Clone, Debug, Serialize)]
-pub struct RegExpSource {
-    pub source: String,
-    pub rule_id: i32,
-}
-
-impl RegExpSource {
-    pub fn new(reg_exp_source: String, rule_id: i32) -> RegExpSource {
-        RegExpSource {
-            source: reg_exp_source,
-            rule_id,
-        }
-    }
-}