From f948e866e01e892f97f5b6607434a09e45dadcae Mon Sep 17 00:00:00 2001
From: fglock <fglock@gmail.com>
Date: Mon, 21 Oct 2024 19:44:41 +0200
Subject: [PATCH] refactor

---
 src/main/java/org/perlonjava/parser/Parser.java           | 6 +++---
 src/main/java/org/perlonjava/parser/StatementParser.java  | 4 ++--
 src/main/java/org/perlonjava/parser/SubroutineParser.java | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/java/org/perlonjava/parser/Parser.java b/src/main/java/org/perlonjava/parser/Parser.java
index 1e0e848..c771e4d 100644
--- a/src/main/java/org/perlonjava/parser/Parser.java
+++ b/src/main/java/org/perlonjava/parser/Parser.java
@@ -86,7 +86,7 @@ public int getPrecedence(String operator) {
     public Node parse() {
         if (tokens.get(tokenIndex).text.equals("=")) {
             // looks like pod: insert a newline to trigger pod parsing
-            tokens.add(0, new LexerToken(LexerTokenType.NEWLINE, "\n"));
+            tokens.addFirst(new LexerToken(LexerTokenType.NEWLINE, "\n"));
         }
         return parseBlock();
     }
@@ -464,7 +464,7 @@ public Node parseCoreOperator(LexerToken token) {
             case "split":
                 // RuntimeList split(RuntimeScalar quotedRegex, RuntimeScalar string, RuntimeScalar limitArg)
                 operand = ListParser.parseZeroOrMoreList(this, 1, false, true, false, true);
-                Node separator = ((ListNode) operand).elements.remove(0);
+                Node separator = ((ListNode) operand).elements.removeFirst();
                 if (separator instanceof OperatorNode) {
                     if (((OperatorNode) separator).operator.equals("matchRegex")) {
                         ((OperatorNode) separator).operator = "quoteRegex";
@@ -508,7 +508,7 @@ public Node parseCoreOperator(LexerToken token) {
                 operand = ListParser.parseZeroOrMoreList(this, 0, false, true, false, false);
                 // Node handle = ((ListNode) operand).handle;
                 // ((ListNode) operand).handle = null;
-                Node handle = ((ListNode) operand).elements.remove(0);
+                Node handle = ((ListNode) operand).elements.removeFirst();
                 if (handle == null) {
                     handle = new IdentifierNode("main::STDOUT", currentIndex);
                 }
diff --git a/src/main/java/org/perlonjava/parser/StatementParser.java b/src/main/java/org/perlonjava/parser/StatementParser.java
index be3a26c..9cd3645 100644
--- a/src/main/java/org/perlonjava/parser/StatementParser.java
+++ b/src/main/java/org/perlonjava/parser/StatementParser.java
@@ -253,7 +253,7 @@ public static Node parseUseDeclaration(Parser parser, LexerToken token) {
                 RuntimeList codeList = Universal.can(canArgs, RuntimeContextType.SCALAR);
                 ctx.logDebug("Use can(" + packageName + ", " + importMethod + "): " + codeList);
                 if (codeList.size() == 1) {
-                    RuntimeScalar code = (RuntimeScalar) codeList.elements.get(0);
+                    RuntimeScalar code = (RuntimeScalar) codeList.elements.getFirst();
                     if (code.getBoolean()) {
                         // call the method
                         ctx.logDebug("Use call : " + importMethod + "(" + args + ")");
@@ -319,7 +319,7 @@ public static BlockNode parseOptionalPackageBlock(Parser parser, IdentifierNode
             BlockNode block = parser.parseBlock();
 
             // Insert packageNode as first statement in block
-            block.elements.add(0, packageNode);
+            block.elements.addFirst(packageNode);
 
             parser.ctx.symbolTable.exitScope();
             TokenUtils.consume(parser, LexerTokenType.OPERATOR, "}");
diff --git a/src/main/java/org/perlonjava/parser/SubroutineParser.java b/src/main/java/org/perlonjava/parser/SubroutineParser.java
index c83fc3a..d634d4c 100644
--- a/src/main/java/org/perlonjava/parser/SubroutineParser.java
+++ b/src/main/java/org/perlonjava/parser/SubroutineParser.java
@@ -12,7 +12,7 @@ public class SubroutineParser {
     /**
      * Parses a subroutine call.
      *
-     * @param parser
+     * @param parser  The parser object
      * @return A Node representing the parsed subroutine call.
      */
     static Node parseSubroutineCall(Parser parser) {