fix: use global initializer instead of per-parse initializer

Author: hegemonic

lib/parser.js

@@ -4,6 +4,29 @@
 
 "use strict";
 
+
+  const Types = require('./types');
+
+  function optional(obj) {
+    obj.optional = true;
+
+    return obj;
+  }
+
+  function repeatable(obj) {
+    obj.repeatable = true;
+
+    return obj;
+  }
+
+  function nullable(obj, modifier) {
+    if (modifier) {
+      obj.nullable = (modifier === '?' ? true : false);
+    }
+
+    return obj;
+  }
+
 class peg$SyntaxError extends SyntaxError {
   constructor(message, expected, found, location) {
     super(message);
@@ -5006,29 +5029,6 @@ function peg$parse(input, options) {
     return s0;
   }
 
-
-  const Types = require('./types');
-
-  function optional(obj) {
-    obj.optional = true;
-
-    return obj;
-  }
-
-  function repeatable(obj) {
-    obj.repeatable = true;
-
-    return obj;
-  }
-
-  function nullable(obj, modifier) {
-    if (modifier) {
-      obj.nullable = (modifier === '?' ? true : false);
-    }
-
-    return obj;
-  }
-
   peg$result = peg$startRuleFunction();
 
   const peg$success = (peg$result !== peg$FAILED && peg$currPos === input.length);

lib/parser.pegjs

@@ -9,7 +9,7 @@
  * @license MIT License <http://opensource.org/licenses/mit-license.php/>
  */
 
-{
+{{
   const Types = require('./types');
 
   function optional(obj) {
@@ -31,7 +31,7 @@
 
     return obj;
   }
-}
+}}
 
 TypeExpression
   = TypeUnionLegacySyntax