SQLParserUtils::*_TOKEN constants made private

UPGRADE.md

@@ -9,6 +9,7 @@
  * Removed `MysqlPlatform::getCollationFieldDeclaration()`.
  * Removed `AbstractPlatform::getIdentityColumnNullInsertSQL()`.
  * Removed `Table::addUnnamedForeignKeyConstraint()` and `Table::addNamedForeignKeyConstraint()`.
+ * `SQLParserUtils::*_TOKEN` constants made private.
 
 ## BC BREAK changes the `Driver::connect()` signature
 

src/SQLParserUtils.php

@@ -27,13 +27,14 @@ use const PREG_OFFSET_CAPTURE;
  */
 class SQLParserUtils
 {
+    private const POSITIONAL_TOKEN = '\?';
+    private const NAMED_TOKEN      = '(?<!:):[a-zA-Z_][a-zA-Z0-9_]*';
+
     /**#@+
+     * Quote characters within string literals can be preceded by a backslash.
      *
      * @deprecated Will be removed as internal implementation details.
      */
-    public const POSITIONAL_TOKEN = '\?';
-    public const NAMED_TOKEN      = '(?<!:):[a-zA-Z_][a-zA-Z0-9_]*';
-    // Quote characters within string literals can be preceded by a backslash.
     public const ESCAPED_SINGLE_QUOTED_TEXT   = "(?:'(?:\\\\)+'|'(?:[^'\\\\]|\\\\'?|'')*')";
     public const ESCAPED_DOUBLE_QUOTED_TEXT   = '(?:"(?:\\\\)+"|"(?:[^"\\\\]|\\\\"?)*")';
     public const ESCAPED_BACKTICK_QUOTED_TEXT = '(?:`(?:\\\\)+`|`(?:[^`\\\\]|\\\\`?)*`)';