Commit inicial - WordPress Análisis de Precios Unitarios

- WordPress core y plugins
- Tema Twenty Twenty-Four configurado
- Plugin allow-unfiltered-html.php simplificado
- .gitignore configurado para excluir wp-config.php y uploads

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

wp-content/plugins/wp-ultimate-csv-importer/lib/NXP/Classes/Operator.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace NXP\Classes;
+
+use NXP\Exception\IncorrectExpressionException;
+use ReflectionFunction;
+
+class Operator
+{
+    /**
+     * @var callable(\SplStack)
+     */
+    public $function;
+
+    public int $places = 0;
+
+    /**
+     * Operator constructor.
+     */
+    public function __construct(public string $operator, public bool $isRightAssoc, public int $priority, callable $function)
+    {
+        $this->function = $function;
+        $reflection = new ReflectionFunction($function);
+        $this->places = $reflection->getNumberOfParameters();
+    }
+
+    /**
+     * @param array<Token> $stack
+     *
+     * @throws IncorrectExpressionException
+     */
+    public function execute(array &$stack) : Token
+    {
+        if (\count($stack) < $this->places) {
+            throw new IncorrectExpressionException();
+        }
+        $args = [];
+
+        for ($i = 0; $i < $this->places; $i++) {
+            \array_unshift($args, \array_pop($stack)->value);
+        }
+
+        $result = \call_user_func_array($this->function, $args);
+
+        return new Token(Token::Literal, $result);
+    }
+}