Parser - abstract resetForNewParse in prep for error handling

src/vm/parser.ts

@@ -70,14 +70,18 @@ export class Parser extends BehaviorSubject<Executable<CommandData>> {
                 })
                 return
             } finally {
-                this.parseCandidate = undefined
-                this.inputForCandidate = []
+                this.resetForNewParse()
             }
         }
 
         throw new InternalParseError('Encountered invalid token.')
     }
 
+    private resetForNewParse() {
+        this.parseCandidate = undefined
+        this.inputForCandidate = []
+    }
+
     private isKeyword(token: LexToken): token is (LexInput & {literal: undefined}) {
         return token.type === 'input' && !token.literal
     }